273 commando Build

Discussion in 'Small Block Mopar Engine' started by stroker402, Apr 3, 2018.

  1. stroker402

    stroker402 Well-Known Member

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    I'm starting page and will be posting pics and info building my 273 commando. This engine I'm using is an original engine with 70K miles on it . Has the oem high compression pistons with a standard bore . I will be installing my closed chamber 920 heads, headers , ld340 intake and a custom grind isky T-3 solid cam that was just ordered 455 lift 260 adv duration.
    I have a question as this build procedes >>>
    What would be the difference in compression if I were to use the oem steel shim head gasket at 10.5:1 vs. the mr gasket 1121g Head Gasket; Flexible Graphite Core; Elastomer Coated; 4.140 in. Gasket Bore; 0.028 in. Compressed Thickness .028 thick . Since the bore of 4.14 is quite large for the 3.65 oem bore , I would loose some compression . Can anyone tell me what would be approx loss by using the 4.14 gasket bore .

    IMG_6393.JPG
     
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    • brian6pac

      brian6pac Well-Known Member

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      The LD340 wont match the ports of the 920 and will hurt the power you are trying to make.
       
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      • stroker402

        stroker402 Well-Known Member

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        Yes , I know what you mean . But that is what the engine cam with. I do have a stock 4 barrel intake that I could modify if need be. At least it would have the same ports.
        DOES ANYONE WHAT TO DO A TRADE/SWAP FOR A LD4B INTAKE ??

        I remember reading an article about a 273 running the stock intake and it was making some good HP.
         
        Last edited: Apr 3, 2018
      • pishta

        pishta I know I'm right....

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        closed chambered heads wont fit those 4bbl pistons with a shim head gasket. Measure before you bolt on.
         
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        • stroker402

          stroker402 Well-Known Member

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          273's had closed chamber heads from factory, also mopar used oem 0.21 steel shim gasket from factory . and mr. gasket is .028 . why won't they fit ?
           
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          • Plymouth 65

            Plymouth 65 Floorable Deplorable

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            273 Commando pistons are above deck pistons, you're closed chamber heads will interfere. You'll require really thick head gaskets or open chamber heads like the heads that came with that motor originally. 65'
             
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            • stroker402

              stroker402 Well-Known Member

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              1965 commando's had closed chamber 315 heads and steel shim head gaskets, That's what I read from other posts.
              from another post >> 273 4-Barrel Thin Head Gasket {.021" thickness}
              Original Part #2463 338
              General Information

              Near impossible to find a set of Original {.020"} Thin-Steel Head Gaskets {#2463 338} for the 273 4-Barrel.

              But, if you dig a little, you can find a set from the 1968 318 {#2806 984}, {.020" thickness} which are designed for the 3.91" Bore.

              Or possibly.

              1969 Part #2951 259 {.028" thickness}
              1970 Part #2946 082 {.028" thickness}
              another post >>> The steel shim gasket wasn't just on the 4 barrel 273...they used on the 2bbl as well...big blocks had 'em too. That's what they used back then.
               
              Last edited: Apr 3, 2018
            • Plymouth 65

              Plymouth 65 Floorable Deplorable

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              That's correct, I'm not certain if there's a difference between the 315 head combustion chamber cc's and the 920 head combustion chamber cc's. 65'
               
            • pishta

              pishta I know I'm right....

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              OK, its just good practice if they are not the original heads and gaskets. I get the 4bbls were used with same heads but Ive seen open and closed heads come off a 273.
               
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              • stroker402

                stroker402 Well-Known Member

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                same chambers , 920's flowed better , and 315 had the joofy intake bolt angle .
                 
              • stroker402

                stroker402 Well-Known Member

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                Yes ,that is good practice to check all those things for sure .
                 
              • pishta

                pishta I know I'm right....

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                What is the flow difference between the 2 years? Any numbers?
                 
              • stroker402

                stroker402 Well-Known Member

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                got to look it up , should be here on fabo
                 
              • Plymouth 65

                Plymouth 65 Floorable Deplorable

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                Didn't know the 920's had the same combustion chamber volume and flowed better. The early 273 does have a different bolt angle. 65'
                 
              • stroker402

                stroker402 Well-Known Member

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                Small Block Cylinder Heads

                CC's / Port Volume / Size / Flow

                1966 - 1967 {273} Casting #2658920

                Heart-Shaped Combustion Chamber

                Factory CC Level..........................62.0 to 65.5 CC's
                Recommended Minimum CC's......57.3 CC's

                Intake Port Gasket Size...............1.05" x 2.07"
                Exhaust Port Gasket Size.............1.14" x 1.59"

                Intake Valve................................1.78"
                Exhaust Valve..............................1.50"

                Intake Bowl Size.........................1.53" {86% of Valve}

                Intake Port.................................125 CC
                Exhaust Port...............................61 CC

                Intake Flow...............................160 CFM @ .450" Lift
                Exhaust Flow.............................107 CFM @ .450" Lift

                Intake-to-Exhaust Flow.............64.8%
                 
              • pishta

                pishta I know I'm right....

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                Cool, How do those numbers compare to the 315 or 080 heads of 65?

                The 920's did not have a larger intake valve stock. I read that somewhere and said, "I dont think so Tim"
                Page 3 of the 66 D-Dart TSB states "standard valves" in the valve grind spec section.
                 
              • stroker402

                stroker402 Well-Known Member

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                Table 1. Chrysler Small Block Cylinder Head Volumes (cc)

                Casting Number Year Chamber Exhaust
                Port Intake
                Port
                2465315 / 2658920 1965-1966 64.5 60 127
                3418915 1971-1972 71 69 149
                4027596 1980-1984 71 65 149
                4323345 1985 --> 74 62 150
                4323302
                 
              • str12-340

                str12-340 FABO Gold Member FABO Gold Member

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                I'd swap a D4B for an LD340. Are you still wanting to do that?
                 
              • pishta

                pishta I know I'm right....

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                so the 315 and the 920 have identical port sizes. Probably the same head with a different bolt angle, Im wondering if the data was on 2 different test benches.
                 
              • str12-340

                str12-340 FABO Gold Member FABO Gold Member

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                Correction LD4B for an LD340
                 
              • toolmanmike

                toolmanmike FABO Staff Staff Member FABO Gold Member

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                And both are listed as having the same closed combustion chamber. 57-64.5 cc's. The #675 head (3 different part numbers) were open chambered and had chamber cc's between 60 and 67/5 cc according to the Larry Shepard book.
                 
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                • 4spdragtop

                  4spdragtop FABO Gold Member FABO Gold Member

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                • pishta

                  pishta I know I'm right....

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                  Here is way too much data from Stan Weiss' Cylinder heads Stan Weiss' - Cylinder Head Flow Data at 28 Inches of Water -- DFW / FLW Flow Files for use with Engine Simulation Software

                  website has nice table, you'll have to work on this one.

                  Stan Weiss' - Cylinder Head Flow Data at 28 Inches of Water -- DFW / FLW Flow Files for use with Engine Simulation Software


                  Manufacturer
                  Part Number Port/Vol
                  Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
                  Chrysler 051 Iron MMM 158/66 - N/A 50/49 113/97 165/123 188/133 193/137 189/137 - - - - -
                  Chrysler 915 360 Mr_340 Iron 160/70 1.88/1.60 N/A - 118/85 166/119 190/126 196/129 193/133 - - - - -
                  Chrysler 915J Iron HPMM 156/73 2.02/1.60 N/A 66/63 123/110 170/135 206/145 220/148 216/148 - - - - -
                  Chrysler 915J Ported I-Nailhead E-Tulip SF600 Iron 192/- 2.02/1.60 N/A 66/46 134/90 191/128 238/157 271/170 283/176 - - - - -
                  Chrysler 915 Ported Iron N/A 2.02/1.60 N/A 62/58 134/115 190/141 233/158 259/172 274/182 - - - - -
                  Chrysler 915 Ported BJR Racing Iron N/A 1.88/1.60
                  -
                  No Pipe N/A 91/89 184/133 222/176 239/191 283/196 276/201 - - - - -
                  Chrysler J N/A 2.02/1.60 N/A 62/47 112/99 157/128 193/137 200/140 201/141 - - - - -
                  Chrysler J Ported Shady Dell Speed Shop N/A 2.02/1.60
                  4.25
                  No Pipe N/A 62/52 135/103 199/135 240/159 258/183 255/186 - - - - -
                  Chrysler 974 Cleaned and milled IQ52 Iron N/A 1.88/1.60
                  -
                  Pipe N/A 58/50 115/92 173/132 202/143 208/145 - - - - - -
                  Chrysler 974 Cleaned and milled IQ52 11/32 SS Iron N/A 2.02/1.60
                  -
                  Pipe N/A 65/50 132/103 184/131 207/143 210/146 - - - - - -
                  Chrysler 340 std. Iron 160/70 2.02/1.60 64 - - - - - 189/142 - - - - -
                  Chrysler 340 X 894 Iron MMM 158/73 - N/A 58/45 125/95 172/122 208/135 221/140 210/142 - - - - -
                  Manufacturer
                  Part Number Port/Vol
                  Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
                  Chrysler 587 360 Mr_340 Iron 160/70 1.88/1.60 N/A - 110/90 165/117 190/135 190/140 185/141 - - - - -
                  Chrysler 587 360 Mr_340 Iron N/A 2.02/1.60 N/A - 127/97 181/128 213/143 215/147 215/147 - - - - -
                  Chrysler 587 340 Iron 160/70 1.88/1.60 63.3 - - - - 214/136 213/142 - - - - -
                  Chrysler 587 340 Iron CCM 160/70 1.88/1.60
                  -
                  No Pipe 63.3 52/46 107/87 162/112 195/121 191/124 192/126 - - - - -
                  Chrysler 587 340 Ported Iron HPMM N/A 1.88/1.60
                  -
                  No Pipe N/A 63/57 126/95 181/132 230/138 253/160 241/179 - - - - -
                  Chrysler 308 360 Iron 160/68 1.88/1.60 65 - - - 201/142 209/147 204/147 - - - - -
                  Chrysler 308 360 Iron 160/68 1.88/1.60 N/A 54/52 108/100 164/135 195/152 208/157 - - - - - -
                  Chrysler 308 360 - Hughes Stage I Ported Iron 172/- - N/A - - - - 245/- - - - - - -
                  Chrysler 308 360 - Hughes Stage II Ported Iron 195/- - N/A - - - - - 265/- - - - - -
                  Chrysler MP 5249574 / 579 Bowl Blend - Intake Gasket Matched BJR Racing N/A 2.02/1.60
                  -
                  No Pipe N/A 84/84 161/119 207/145 241/185 255/192 241/192 - - - - -
                  Chrysler Truck Magnum Iron N/A 1.92/1.625 N/A - 131/97 186/132 212/145 212/146 214/147 215/147 - - - -
                  Chrysler Truck Magnum Ported Shady Dell Speed Shop Iron N/A 1.92/1.625 N/A - 133/116 196/157 225/172 250/177 259/181 260/181 - - - -
                  Manufacturer
                  Part Number Port/Vol
                  Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
                  Chrysler 137 360 Magnum CCM 153/- 1.92/1.625 60 60/54 118/99 165/131 195/137 209/138 205/138 - - - - -
                  Chrysler Magnum BJR Racing N/A 1.92/1.625
                  -
                  No Pipe N/A 84/80 132/118 201/134 226/134 235/134 236/134 - - - - -
                  Chrysler Magnum Ported BJR Racing N/A 1.92/1.625
                  -
                  No Pipe N/A 84/84 139/130 201/190 231/192 246/190 252/190 - - - - -
                  Chrysler 576 360 High Swirl CCM Iron 160/68 2.02/1.60 70 62/55 112/99 160/119 182/126 192/128 187/130 - - - - -
                  Chrysler 302 318 Swirl 160/68 1.78/1.50 N/A - 105/71 152/104 187/113 190/117 190/120 - - - - -
                  Chrysler 302 318 Swirl 160/68 1.78/1.50
                  -
                  No Pipe N/A - 92/71 130/104 164/113 170/117 172/120 - - - - -
                  Chrysler 302 318 Swirl Ported Shady Dell Speed Shop 151/- 2.02/1.60
                  4.25
                  No Pipe N/A - 148/86 212/114 241/131 247/140 241/145 - - - - -
                  Chrysler 302 Ported Hughes Engines N/A 2.02/- N/A 70/- 141/- 202/- 239/- 268/- 250/- - - - - -
                  Chrysler 302 Full Ported Hughes Engines N/A 2.055/- N/A 67/- 127/- 187/- 241/- 285/- 298/- - - - - -
                  Chrysler 302 Flowtech - Steven Magnotti SF110 Alum N/A 1.88/1.617 N/A 50/42 109/97 164/118 177/146 190/163 198/- - - - - -
                  Chrysler 596 '78 360 Iron CCM 158/66 - 65.5 53/48 107/89 159/114 185/121 199/123 193/124 - - - - -
                  Chrysler 596 Iron 158/66 1.88/1.60 N/A 63/48 117/98 174/121 193/126 192/128 - - - - - -
                  Manufacturer
                  Part Number Port/Vol
                  Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
                  Chrysler 596 Ported Shady Dell Iron N/A 1.88/- N/A 59/- 120/- 183/- 226/- 241/- 249/- - - - - -
                  Chrysler 596 Hughes Iron N/A 1.88/1.60 N/A 66/51 89/103 136/131 184/140 184/141 - - - - - -
                  Chrysler 596 Ported / Stealth Hughes Iron N/A 2.02/1.60 N/A 71/80 144/124 192/149 226/160 223/168 - - - - - -
                  Chrysler Magnum Hughes N/A 1.92/1.62 N/A 51/55 121/109 181/148 207/171 209/176 208/178 - - - - -
                  Chrysler Magnum 360 N/A 1.925/1.625 N/A - 121/109 181/148 207/170 209/176 - - - - - -
                  Chrysler Magnum 360 Ported ET Performance 177/- 1.955/1.625
                  4.155 N/A 66/51 127/102 174/140 218/169 249/186 - - - - - -
                  Chrysler 140 Magnum R/T CCM 180/71 1.925/1.625 60 70/62 137/111 181/142 209/163 211/168 211/171 - - - - -
                  Chrysler 140 Magnum R/T MMM N/A 1.92/1.625
                  -
                  No Pipe N/A 60/56 123/107 173/150 205/170 219/177 223/180- 220/- - - - -
                  Chrysler 140 Magnum R/T Blend Bowl to VJ MMM N/A 1.92/1.625
                  -
                  No Pipe N/A 62/55 125/108 177/149 217/173 238/183 246/187 242/189 - - - -
                  Chrysler 140 Magnum R/T Full Port MMM N/A 1.92/1.625
                  -
                  No Pipe N/A 66/59 128/116 178/155 222/179 246/204 264/213 271/217 - - - -
                  Chrysler Magnum R/T Shady Dell Speed Shop N/A 1.92/1.625
                  -
                  No Pipe N/A - 136/110 195/155 227/173 239/179 245/182 241/183 - - - -
                  Chrysler Magnum R/T Ported Shady Dell Speed Shop N/A 1.92/1.625
                  4.25
                  No Pipe N/A - 148/112 209/155 243/189 257/198 268/201 281/203 - - - -
                  Manufacturer
                  Part Number Port/Vol
                  Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
                  Chrysler Magnum R/T Ported Shady Dell Speed Shop N/A 2.02/1.625
                  4.25
                  No Pipe N/A - 138/105 200/152 245/186 282/198 304/205 293/209 - - - -
                  Chrysler MP Commando / Magnum N/A 2.02/1.60 N/A - 116/84 166/115 213/141 250/163 263/177 273/187 280/188 - - -
                  Chrysler MP Commando / Magnum Ported N/A 2.02/1.60 N/A - 102/94 150/126 201/152 239/176 271/187 291/193 301/196 - - -
                  Chrysler Commando N/A 2.02/1.60 N/A - 104/93 153/131 201/153 240/162 245/166 245/166 - - - -
                  Chrysler Commando Ported Shady Dell Speed Shop N/A 2.05/1.60
                  4.25
                  No Pipe N/A - 148/123 207/192 254/233 289/243 312/243 312/243 - - - -
                  Chrysler W2 P5007355 RedEye Iron N/A 2.02/1.60 68 64/59 120/122 169/147 210/156 237/161 250/168 260/168 - - - -
                  Chrysler W2 P5249769 RedEye Iron N/A 2.02/1.60 65 61/58 120/123 169/147 208/156 232/161 238/162 244/162 - - - -
                  Chrysler W2 P5249769 Ported Bullet Cylinder Heads Iron 230/91 2.08/1.60 65 72/57 141/109 201/173 254/206 294/222 310/231 318/238 - - - -
                  Chrysler W2 P5007445AB RedEye Iron N/A 2.02/1.60 65 62/59 121/122 170/149 211/160 243/170 257/172 265/172 - - - -
                  Chrysler W2 P5007708AB RedEye Iron N/A 2.02/1.60 47 60/57 117/118 165/145 205/155 233/163 247/165 254/165 - - - -
                  Chrysler W2 Iron 185/- 2.02/1.60 N/A 63/57 121/105 169/132 211/144 238/148 242/150 - - - - -
                  Chrysler W2 Iron HPMM N/A 2.02/1.60 N/A - - 173/141 215/148 244/151 254/151 - - - - -
                  Manufacturer
                  Part Number Port/Vol
                  Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
                  Chrysler W2 Ported Iron N/A 2.02/1.60 N/A - - 188/170 236/197 272/209 300/213 315/230 - - - -
                  Chrysler W2 810 Flowtech - Steven Magnotti SF110 Alum N/A 2.08/-
                  4.00 N/A 70/- 140/- 204/- 247/- 252/- - - - - - -
                  Chrysler W2 810 Fully Ported Flowtech - Steven Magnotti SF110 Alum N/A 2.08/-
                  4.00 N/A 75/- 154/- 221/- 273/- 293/- 302/- - - - - -
                  Chrysler W2 994 Johnson 188/- 2.02/1.60 N/A 59/50 122/110 182/154 229/173 262/176 265/174 250/172 - - - -
                  Chrysler W2 994 Ported Ryan Johnson 196/- 2.02/1.60 N/A 60/50 127/105 184/154 232/185 274/200 302/208 280/211 - - - -
                  Chrysler W2 Ported Shady Dell Speed Shop N/A 2.02/1.60
                  4.25
                  No Pipe N/A 83/55 148/108 205/160 255/193 291/209 313/215 321/217 - - - -
                  Chrysler W2 Ported Batten Stage 3 Alum 235/- 2.08/1.60
                  4.25
                  No Pipe N/A - 138/112 199/164 253/193 292/206 316/212 329/213 - - - -
                  Chrysler W5 Shady Dell Speed Shop Alum N/A 2.02/1.60
                  -
                  No Pipe N/A 61/45 104/83 155/122 207/149 244/164 263/172 263/173 - - - -
                  Chrysler W5 '96 Flowtech - Steven Magnotti SF110 Alum N/A 2.05/1.60
                  4.00 N/A 51/65 104/110 160/137 205/150 241/159 257/162 266/166 - - - -
                  Chrysler W5 Ported Shady Dell Speed Shop Alum N/A 2.08/1.60
                  4.25
                  No Pipe N/A - 142/114 204/150 256/195 300/225 319/238 328/244 - - - -
                  Chrysler W5 Max Ported Shady Dell Speed Shop Alum N/A 2.08/1.60
                  4.25
                  No Pipe N/A - 145/120 209/171 260/217 303/245 335/258 337/263 - - - -
                  Chrysler W5 Ported Mr P Body Alum N/A 2.02/-
                  4.03 N/A 72/- 151/- 217/- 257/- 279/- 290/- 295/- 303/- - - -
                  Manufacturer
                  Part Number Port/Vol
                  Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
                  Dodge P-7 Ported Chapman Alum 327/- 2.18/1.61
                  -
                  No Pipe 49.5 - 139/112 225/161 300/211 359/247 376/258 379/267 381/271 - - -
                  Dodge P-7 Ported HRD Alum N/A 2.16/1.62 N/A - 133/124 233/179 313/227 347/254 380/267 394/276 403/281 - - -
                  Dodge P-7 Ported ET Performance Alum 302/- 2.18/1.625
                  4.18 52.5 67/46 138/102 227/143 301/187 355/216 376/240 389/249 403/254 - - -
                  Dodge P-7 Ported ET Performance Alum 330/- 2.18/1.625
                  4.18 54.5 67/46 142/102 230/143 302/187 363/216 385/240 394/249 400/254 - - -
                  Dodge Cup Head Ported MBE Alum 328/- -
                  -
                  No Pipe N/A - - - - - - - 412/- - - -
                  Chrysler W7 Ported Shady Dell Speed Shop Alum 252/- 2.15/1.60
                  4.25
                  No Pipe N/A - 148/100 216/147 272/194 311/224 350/244 362/257 - - - -
                  Chrysler W8 Ported Chapman 269/- 2.18/1.625
                  -
                  No Pipe 59 71/56 153/110 224/176 284/216 327/223 343/243 352/252 - - - -
                  Chrysler W8 RS Ported Chapman 278/- 2.18/1.625
                  -
                  No Pipe 47.5 70/52 151/109 225/178 288/222 334/245 351/258 355/265 - - - -
                  Chrysler W8 CNC by M2 Race Systems 272/- 2.18/1.60
                  4.125 48 - - 236/165 297/218 340/244 361/255 373/262 373/267 - - -
                  Chrysler W8 Ported Shady Dell Speed Shop N/A 2.16/1.625
                  4.25
                  No Pipe N/A - 128/97 198/138 277/200 339/236 377/259 392/271 393/276 - - -
                  Chrysler W8 Ported ET Performance N/A 2.18/1.625
                  4.155 N/A 69/51 134/101 199/144 256/187 310/218 353/238 371/250 -/258 - - -
                  Chrysler W8 Brett Ported 298/- 2.18/- N/A - - - 276/- 329/- 367/- 382/- 394/- 403/- - -
                  Manufacturer
                  Part Number Port/Vol
                  Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
                  Chrysler W8 Ported Truck Series N/A 2.18/1.65 N/A - 139/106 202/156 266/205 312/235 358/251 380/261 384/266 - - -
                  Chrysler W9 N/A 2.15/1.60 N/A - 129/103 190/147 240/172 288/183 295/185 295/185 - - - -
                  Chrysler W9 261 Ported Chapman 360 Sprint 261/- 2.15/1.625
                  -
                  No Pipe 60 68/52 150/112 230/181 293/220 335/239 340/243 342/250 - - - -
                  Chrysler W9 261 Ported Chapman Sprint 261/- 2.18/1.625
                  -
                  No Pipe 60 - 148/103 217/159 276/204 320/226 306/241 351/251 - - - -
                  Chrysler W9 268 Ported Chapman 268/- 2.20/1.625
                  -
                  No Pipe 64 68/52 151/112 230/181 294/220 338/239 347/243 350/250 - - - -
                  Chrysler W9 274 Hutter 274/- 2.18/1.625 60 - 134/111 209/161 271/201 320/240 347/253 365/260 - - - -
                  Chrysler W9 RP 278 Ported Chapman Midget 278/124 2.15/1.60
                  -
                  No Pipe 45 66/49 145/116 221/201 289/244 339/260 368/267 371/270 - - - -
                  Chrysler W9 RP 296 Ported Chapman 296/124 2.20/1.60
                  -
                  No Pipe 46 68/47 146/110 227/169 299/217 342/240 369/252 383/259 385/262 - - -
                  Chrysler W9 RP 325 Ported Chapman 325/- 2.25/1.625
                  -
                  No Pipe 46 72/58 137/119 214/192 282/246 341/260 379/266 405/269 419/272 - - -
                  Chrysler W9 Ported Shady Dell Speed Shop 272/- 2.15/1.60
                  4.25
                  No Pipe N/A - 141/103 200/159 245/204 304/226 350/241 379/251 - - - -
                  Chrysler W9 Ported ET Performance N/A 2.18/1.60
                  4.155 58 75/59 144/124 219/192 274/226 318/242 350/251 351/258 348/263 - - -
                  Chrysler W9 Ported Jones Engineering 300/- 2.20/1.60 48 - 156/118 230/175 292/223 340/241 373/249 390/261 399/265 - - -
                  Manufacturer
                  Part Number Port/Vol
                  Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
                  AIRWOLF 220 Dr Js Performance Alum 220/- 2.08/1.60 N/A 72/- 144/- 219/- 273/- 301/- 312/- 316/- 319/- 321/- 326/- -
                  Brodix SP MO Alum 192/- 2.08/1.60 67 - 129/119 180/160 221/182 249/190 263/195 269/198 - - - -
                  Brodix B1 BA SUPR Alum 192/- 2.08/1.60 67 - 129/119 180/160 221/182 249/190 263/195 269/198 - - - -
                  Brodix B1 BA Alum 195/- 2.08/1.60 65 - 129/119 180/160 221/182 249/190 263/195 269/198 - - - -
                  Brodix B1 BA '94 Flowtech - Steven Magnotti Intake 30 Deg Back Cut SF110 Alum 195/- 2.08/1.60
                  4.25 N/A 68/46 129/105 171/139 198/162 223/178 227/184 -/187 - - - -
                  Brodix B1 BA '94 Flowtech - Steven Magnotti Ported Exhaust plus Seats Recut SF110 Alum 205/- 2.08/1.60
                  4.25 N/A 63/50 130/109 185/171 231/213 274/226 291/236 297/242 - - - -
                  Brodix B1 BA '94 Flowtech - Steven Magnotti Ported Intake - Exhaust plus Seats Recut SF110 Alum N/A 2.20/1.60
                  4.25 N/A 65/50 136/109 196/171 248/213 284/226 308/236 320/242 - - - -
                  Brodix B1 BA Ported Alum N/A 2.08/1.60 65 - 145/121 203/169 250/195 286/208 300/214 303/217 - - - -
                  Brodix B1 BA Shady Dell Speed Shop Alum N/A 2.08/1.60
                  4.25
                  No Pipe N/A - 120/101 169/137 202/160 226/168 239/172 245/172 - - - -
                  Brodix B1 BA Ported Shady Dell Speed Shop Alum N/A 2.08/1.60
                  4.25
                  No Pipe N/A - 135/102 192/143 239/173 276/191 297/207 314/217 - - - -
                  Brodix B1 BA Ported Scott Brown Alum 214/- 2.08/1.60
                  4.03
                  2" Pipe N/A 69/62 138/120 188/157 232/215 264/237 288/249 298/263 - - - -
                  Brodix B1 BA MC Ported Alum 239/- 2.14/1.60 67 - 147/120 216/170 272/198 309/210 332/215 347/220 - - - -
                  Manufacturer
                  Part Number Port/Vol
                  Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
                  Brodix B1 BA MC Shady Dell Speed Shop Alum 239/- 2.15/1.60 67 72/- 128/- 183/- 209/- 241/- 255/- 266/- - - - -
                  Brodix B1 BA MC Ported Shady Dell Speed Shop Alum N/A 2.15/1.60
                  4.25
                  No Pipe N/A 83/76 152/124 210/172 254/207 296/226 326/236 349/242 - - - -
                  Brodix B1 Ported Bullet Cylinder Heads Alum N/A 2.08/1.60 65 65/57 129/111 187/177 238/216 271/235 291/241 295/244 - - - -
                  Edelbrock Performer RPM (340) 6077 NPS Out of Box Alum 171/77 2.02/1.60
                  4.016
                  No Pipe N/A 61/53 121/101 173/135 212/155 235/164 247/168 246/168 - - - -
                  Edelbrock Performer Intake Gasket Matched Exhaust Ported BJR Racing Alum N/A 2.02/1.60
                  -
                  No Pipe N/A 92/86 167/127 207/152 242/195 280/205 285/210 291/216 - - - -
                  Edelbrock Performer RPM Ported Anderson Port Development SF1020 Alum N/A 2.02/1.60 N/A 73/- 138/- 191/- 246/- 292/- 321/- 334/- 338/- 342/- - -
                  Edelbrock Performer RPM Magnum 61779 SF1020 Alum 176/75 2.02/1.60 58 62/52 119/105 175/142 225/169 251/185 260/190 - - - - -
                  Edelbrock Performer RPM Magnum Dr Js Performance Alum N/A 2.02/1.60
                  -
                  Pipe N/A 59/51 116/100 171/138 219/159 247/177 254/182 260/189 - - - -
                  Edelbrock Performer RPM Magnum Ported Dr Js Performance Alum N/A 2.02/1.60
                  -
                  Pipe N/A 74/62 151/118 221/160 263/196 288/217 294/220 297/236 - - - -
                  Edelbrock Ported Hughes Alum N/A 2.02/1.60 N/A 63/66 141/129 206/150 253/176 282/182 285/188 - - - - -
                  Edelbrock CNC Hughes Stage 3 Alum N/A 2.08/1.60 N/A 71/76 146/118 215/156 262/173 286/189 294/198 298/200 - - - -
                  Edelbrock Magnum MMM Alum N/A 2.02/1.60 N/A 62/52 119/105 175/142 225/169 251/185 260/190 - - - - -
                  Manufacturer
                  Part Number Port/Vol
                  Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
                  Edelbrock Magnum Shady Dell Speed Shop Alum N/A 2.02/1.60
                  4.25
                  No Pipe N/A - 128/105 184/139 225/164 249/177 265/183 267/184 - - - -
                  Edelbrock Magnum Stage 3 Ported Shady Dell Speed Shop Alum N/A 2.02/1.60
                  4.25
                  No Pipe N/A - 145/112 204/152 255/190 286/202 297/208 297/211 - - - -
                  Edelbrock Stage 4 Ported Shady Dell Speed Shop Alum N/A 2.05/1.60
                  4.25
                  No Pipe N/A - 147/112 207/164 255/193 279/212 293/226 293/231 - - - -
                  Edelbrock Stage 3 Ported Aerohead Alum N/A 2.08/1.60 N/A 72/66 132/113 197/145 248/170 277/183 302/191 306/197 - - - -
                  EngineQuest CH318A 5.2l/5.9l Magnum Iron 172/- 1.92/1.625 N/A 68/57 124/114 179/155 213/180 227/187 233/189 - - - - -
                  EngineQuest CH318A 5.2l/5.9l Magnun Ported Iron N/A 2.02/1.60 N/A 69/60 138/124 200/169 247/200 273/219 275/229 - - - - -
                  EngineQuest CH318B Magnun Iron 172/- 1.92/1.625 N/A 66/55 121/101 179/142 214/168 226/174 235/175 238/- - - - -
                  EngineQuest CH318B Magnun Ported SKMFX Engines Iron N/A 2.02/1.60 N/A 65/56 132/110 189/150 240/168 278/178 300/184 301/185 - - - -
                  Indy 360X IQ52 Out of Box Iron N/A -
                  -
                  Pipe N/A 57/52 124/105 184/- 230/- 255/- 257/201 249/208 - - - -
                  Indy 360X Hughes Iron 179/67 1.92/1.625 62 - 116/91 177/138 224/167 252/174 263/177 264/179 - - - -
                  Indy 360X Brian Hafliger Iron N/A 2.02/-
                  4.03 N/A 68/- 142/- 201/- 249/- 281/- 296/- 294/- - - - -
                  Indy 360-1 210/85 2.10/1.65 63 - 102/79 147/112 200/145 252/170 278/183 280/189 - - - -
                  Manufacturer
                  Part Number Port/Vol
                  Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
                  Indy 360-1 Out of Box Shady Dell Speed Shop N/A 2.10/1.625
                  4.25
                  No Pipe N/A 72/52 138/90 198/132 240/163 271/177 278/186 271/190 - - - -
                  Indy 360-1 Ported Shady Dell Speed Shop 228/- 2.10/1.625
                  4.25
                  No Pipe N/A - 157/110 217/158 263/204 304/222 322/230 334/241 - - - -
                  Indy 360-1 Full Porting 245/95 2.14/1.65 N/A - 135/115 202/155 259/185 295/206 325/219 339/226 - - - -
                  Indy 360-1 245 Out of Box Shady Dell Speed Shop 255/- 2.15/- N/A 69/- 147/- 213/- 269/- 294/- 312/- 322/- - - - -
                  Indy 360-1 245 Ported Shady Dell Speed Shop 255/- 2.15/- N/A 70/- 144/- 210/- 269/- 313/- 344/- 361/- - - - -
                  Indy 360-2 180/85 2.10/1.65 63 - 83/79 138/112 186/145 230/170 249/183 252/189 - - - -
                  Indy 360-2 180/85 2.10/1.65 63 - 83/79 138/112 186/145 230/170 249/183 252/189 - - - -
                  Indy 360-2 Full Porting 230/99 2.10/1.65 65 - 146/107 209/145 259/183 295/202 310/215 317/220 - - - -
                  Indy 360-2 Full Porting - Bowls Blended Exhaust Short Turn Brian N/A 2.10/1.65 N/A - 151/128 220/172 277/209 300/231 320/244 320/253 - - - -
                  Indy 360-2 Ported Shady Dell Speed Shop Oval 230/- 2.10/1.625
                  4.25
                  No Pipe N/A - 146/112 210/158 266/198 309/225 323/243 323/255 - - - -
                  Indy 360 R Ported Bullet Cylinder Heads 230/91 2.10/1.60 64 70/51 138/105 208/159 259/188 300/213 318/224 334/235 - - - -
                  RHS Mild Bowl/Seat Blend N/A 2.02/1.60 N/A 69/58 141/119 197/161 241/184 267/193 271/195 - - - - -
                  Manufacturer
                  Part Number Port/Vol
                  Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
                  Shanons Engineering 360 Full Porting N/A 2.19/1.65 63 - - - - - - 338/226 - - - -
                   
                • toolmanmike

                  toolmanmike FABO Staff Staff Member FABO Gold Member

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                  Lots of good info there but I don't see any 273 heads on the list unless I missed them.

                  The Galen parts book lists the
                  #315 head as a 64-65 head with 1.78/ 1.50 valves and a closed chamber #080 head as a 64-65 head with 1.78/ 1.50 valves and a closed chamber
                  #178 head as a 1966 head with 1.78/ 1.50 valves and a closed chamber (early)
                  #234 head as a 1966 head with 1.78/ 1.50 valves and a closed chamber (late)
                  #920 head as a 1966 head with 1.87/ 1.50 valves and a closed chamber (273-4 with CAP)
                  #951 head as a 1966 head with 1.87/ 1.50 valves and a closed chamber (D Dart)
                  #920 head as a 66-67 273 and 67 318 with 1.78/ 1.50 valves and a closed chamber
                  In 1968 the 273/318 heads went to a open chamber with the same 1.78/ 1.50 valves

                  I have a set of #920's but without matching the part number I don't know what they came off of. I doubt if they are the 1.87 intake valve heads.
                   
                • stroker402

                  stroker402 Well-Known Member

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                  Jan 30, 2006
                  Location:
                  milwaukee wi.
                  Local Time:
                  8:52 PM
                  Toolmanmike and others can you answer this question >>>>>>>>>>>>>>>>>>>>>>>
                  Are steel shim head gaskets made of embossed steel like they are described as or are they made with a composite material like felpros?
                  I've seen a pair on the internet saying they were the steel shim gaskets but they looked like they were composite like felpros. this image is for a 273 head gasket and it does not look like a steel shim gasket at all . what gives?
                  maybe some you have torn apart these engine over the years can tell us what is suppose to be installed from the factory , steel metal shim or composite ?

                  s-l400-jpg.jpg