How hard can a 273,run? (street/strip)?

[Abodybomber]

Just looking, for actual experiences, here. How hard,have you seen these, worked?

 

[duster360]

:happy1:

 

[dibbons]

Street legal 1965 273 .060 over; stock rods, crank and cylinder head; 600 double pumper, Cyclone fenderwell headers, 1012C camshaft, 10.5 TRW, Tarantula intake, Chrysler 4-speed, 4.56 8 3/4 suregrip, 10" M & H slicks. Build date 1975 by Auto Technology student (me) at Hartnell Community College, Salinas, California. Best E.T. 12.72 @ 108 MPH (purchased as a 273 2-barrel automatic with one burned exhaust valve for $125.00)

View attachment 1965 Valiant Effort copy.jpg

 

[Abodybomber]

Street legal 1965 273 .060 over; stock rods, crank and cylinder head; 600 double pumper, Cyclone fenderwell headers, 1012C camshaft, 10.5 TRW, Tarantula intake, Chrysler 4-speed, 4.56 8 3/4 suregrip, 10" M & H slicks. Build date 1975 by Auto Technology student (me) at Hartnell Community College, Salinas, California. Best E.T. 12.72 @ 108 MPH (purchased as a 273 2-barrel automatic with one burned exhaust valve for $125.00)

Isky 1012c cam specs:
390110 1012-C 4500-8000

.580 .028 312° 274°
.580 .028 312° 274°
SOLID 104°
That's a big camshaft! Nice numbers.

 

[66fs]

My best was a "64" 273. TRW +.040 10.5:1 forged pistons, Bored and honed with torque plates, file to fit Speed Pro rings, "72" 340 J heads with 1.88 intake valves milled .040 block side .038 intake side chambers cc'd all equal within .2 cc sharp edges smoothed in the bowl and ports gasket matched, "71" 340 intake and TQ, used "72" 340 cam, Mopar Performance electronic ignition, 8 3/4 Suregrip 4.10 gears, 340 flywheel and a 440 10.95 B&B Chrysler pressure plate and clutch. Factory exhaust manifolds with duals and turbo mufflers. Never ran a timed 1/4 mile but it was real fast and quick. It would burn the tires all the way through first, halfway through second, a little into third. I used to run it up to 140 mph once a month when it was my daily driver. With 2.76 gears, for trips, it would get mid to high 20's mpg and would shift into 4th gear at 100 mph. Pulled the 273 because gas wasn't good enough, swapped in a built 170 /6, still have that 273.

 

[ddartdude]

The notes on the time slips that I got from the driver of my D/Dart (Ralph Costa) state it was shifted at from 6700-7000 RPM's and went through the traps at between 6900 and 7000. It ran a best ET of 12.95 and as fast as 105 MPH back in 1966.

The car was set up for D/Stock. It had 5.30 gears and ran on 7" wide slicks inflated to 9-14 psi. At that time, they used rosin on the slicks for traction.

 

[dibbons]

I was just wondering if the above D/Dart was street legal (since we are talking about street/strip)? I was cruising Main St. in Salinas, CA on Fridays nights in bumper to bumper traffic in my Valiant! It was flat towed to Fremont, CA for Wednesday night grudge racing and Sunday bracket races.

 

[66fs]

I was just wondering if the above D/Dart was street legal (since we are talking about street/strip)? I was cruising Main St. in Salinas, CA on Fridays nights in bumper to bumper traffic in my Valiant! It was flat towed to Fremont, CA for Wednesday night grudge racing and Sunday bracket races.

I would not want to drive it much with 5:30 gears. I could only take 4:10's for 3 or 4 months.

 

[ddartdude]

I was just wondering if the above D/Dart was street legal (since we are talking about street/strip)? I was cruising Main St. in Salinas, CA on Fridays nights in bumper to bumper traffic in my Valiant! It was flat towed to Fremont, CA for Wednesday night grudge racing and Sunday bracket races.

That I know of, this D/Dart was not driven on the street. It currently has 372 miles on the odo. However ..... the first D/Dart that I had bougth had 127,000 miles on it. It's the all white one that's gone across the BJ and Mecum stages quite a few times. The original owner of that car drove it over 75,000 miles on California freeways with the 4.86 gears in it. Those were changed for 3.23's at this point in it's life and used for the next 50,000 or so miles. Because of exhaust leaks, he had removed the Doug's headers and installed a factory HP exhaust system on the car. He stored the headers in his garage and they came with the car when I bought it. He also replaced his homemade crash box trans for one out of a 65 dart.

So, yes, D/Darts were street driven.

I know of others that have many street driven miles on them.

 

[2 Darts]

#44 Dart 2d place 1967 SCCA TransAm series. The Barracudas were fielded by Team Starfish. (I'm not making this up. It was the 60s after all.) Yes, they were flogged.

 

[Hipo65]

My dad had a 66 hi-po 273 (to replace the dead 318 in it)he built in tech school (in 1976) it was .030 over 10.5:1 trw's solid cam that was very close to the 68 std. trans 340 appliance headders 2800 tci stall in the manual valveboded 727 with 4:10 out back in a 67 plymouth belveadere (buchered that!) He ran low 14's all day with it! Still regrets selling that car! Ill see if i can post a pic after work of it! I love thease motors!

 

[69 Cuda 440]

Just looking, for actual experiences, here. How hard,have you seen these, worked?

Back-in-the-Day

A 'hot stock' 273/235 HP A-Body that was a 'Street/Strip' car.

* NHRA Stock 'Cheater' Camshaft
* Hooker Headers
* Gears {4.56}
* Weber Clutch Set-Up {#2500 lb. Spring-Rate}
* Stock Flywheel {9.5"} w/122-Tooth
* Stewart-Warner Electric Fuel Pump
* Hurst Shifter
* Competition 3/Angle Valve Job
* Fan-Clutch
* Deep-Groove Pulleys
* Torque-Strap
* Battery {located in trunk compartment}
* Moderately {set-up} Rear Suspension
* Pinion Snubber
* Front Shocks {70/30}
* Sun Tachometer
* M & H Racemaster 7" Slicks
* Engine Block 'Stock'

14.60's @ 95 MPH

 

[perfacar]

hi, 1970's , 235/273 dart. lunati stock cam, 3 angle valve grind, trw pistons, 5.13 gear, 7 'slicks, stock four speed trans, launch at 6000, shift at 6000, ran 13.31 @ 102.38 , drove it on street and raced it.

 

[69 Cuda 440]

Year 1971

Car ........................ 1966 Valiant {convertible}
Shipping Weight....... #2850 lbs.
Engine..................... 273 'Commando'
Pistons.................... 10.5-1 {Factory Pistons -Standard Bore} - Clearance .005"
Piston Rings ............ Speed Pro
Bearings ................. Federal-Mogul
Oil-Pump ................ Sealed Power {High-Volume}
Oil-Control .............. Windage Tray

Note: Engine Block 'not' Decked.
Note: Internal Engine components 'not' Balanced.

Camshaft ............. 'General Kinetics'
Type .................... Mechanical
Lift ...................... .455"/.455"
Duration ................ 276*/276*
Overlap ................. 44*

Cylinder Heads ....... #2658920 > Competition Valve-Job {3/Angle}
CC'd ..................... 60.0
Valve Springs ........ '340' Single-Coil w/Damper {#234 lbs. @ Valve Open}

Intake .................. Stock Cast Iron Single-Plane #2536563
> Center butterfly section removed, and outer plenum edges smoothed.
> 'Mr. Gasket' {1" Spacer} Heat-Dissipator

Carburetor ............ Carter AFB #4120S {500 CFM} ~ Re-jetted

Distributor ............. 'Stock Factory' Dual-Point {w/Performance Curve}

Headers ................. 'Belanger' {1 1/2" Pipe x 44" Tube-Length}
Collector Size ........ . 10" Length x 3" Outlet

Transmission........... A-904
Built by; ................ 'Vitar'
Valve-Body ............ Manual
Converter .............. 2700 RPM Stall-Rate

Gears .................... 4.33

Suspension ............ Stock {Heavy-Duty}

Slicks .................... Goodyear {7" Wide x 27" Tall}

Performance .......... 14.80's @ 93 MPH

NHRA Class ........... K/SA {12.00 to 12.49 Wt/Hp}

1971 Track Results ... Won '9' Class Trophy's out of 17 Events

 

[Darter6]

Abodybomber, We have a new member that goes by 684door.He has and owned a 68 Dart with a 273 for over 20 years that ran in the 12's and was street driven.I met him and his Dad about 10 years ago.They made that 273 fly.He should be your new friend.

 

[Hipo65]

As promised here's a pic of dads 67 belvedere that ran a warmed over hi-po 273 in it! he did well @ Kearney drag way in Kearney ne. in about '78-'79 Hes has awards for the brackets he ran in it clicked off 14.30's all day everyday! (Just as I came into the picture!) I barley remember that car sold it when I was 4 years,old back in '83! But he went with the 273 for one it was cheap & froze up & knew they can be built to run! That's what started my love for the little cast aside 273! Last I new it was in texas somewhere...

 

[cosgig]

If I can find it, there was an article in MCG about a guy and his 67 Dart running mid 10's with a 273, and no add on help either!! Geof

 

[jerry6]

As promised here's a pic of dads 67 belvedere that ran a warmed over hi-po 273 in it! he did well @ Kearney drag way in Kearney ne. in about '78-'79 Hes has awards for the brackets he ran in it clicked off 14.30's all day everyday! (Just as I came into the picture!) I barley remember that car sold it when I was 4 years,old back in '83! But he went with the 273 for one it was cheap & froze up & knew they can be built to run! That's what started my love for the little cast aside 273! Last I new it was in texas somewhere...

Wow , love them old Belvedre , 14.3 is pretty good for that car with a 273 , my friends were running 14.2 to 14.6 with sock 340 Dusters and Darts with a set of headers not much else .

 

[684door]

Abodybomber, I am the guy that Darter6 was referring too. I have a full interior 68 Dart 4 door. The car was street /strip and ran 12.60's at 104 with 1.68 60 foot times. The key is RPMs. I came out of the hole at 3800-4000 RPM. Shifted at 6800 and went through the traps at 6800. 273 30 over 10.5:1, 557 mopar solid cam, ported 360 heads, rpm manifold, 700 holley DP, 904 4800 stall, and 4.88 gears.

 

[krazykuda]

273's can run like a raped ape.... :burnout:

 

[mad accountant]

My dad had a 66 Formula S with the 273 and a 4 speed. Swears nothing could touch him in "friendly" quarter mile runs except his brothers GTX. Had quite a few stories about blowing the doors off supposedly faster cars

 

[69 Cuda 440]

Year 1969

Sleeper Compact Wagon

1964 Plymouth Valiant V-200 'Station Wagon'

* 1967 > 273/180 HP 2-Barrel Engine
* {8.8-1} Compression-Ratio {Flat-Top Pistons w/Notches}

* Cylinder Heads 'Closed-Chamber' {#2658920}
* Milled to 51.3 CC's to get the Compression-Ratio to {9.8-1}
* Ported-and-Polished
* Competition Valve-Job

* Crower 'Mechanical' Camshaft
> .477"/.477" Lift ~ 280*/280* Duration ~ 56* Overlap

Custom fabricated 3 x 2-Barrel Intake from 'General Casting'

Carburetors from a 1964 Pontiac GTO 389/348 HP 'Tri-Power'
* Rochester Carburetors
> #7024178; Front
> #7024175; Center
> #7024179; Rear
> Total CFM's = 767

* 4-Speed {A-833}
* Schieffer Clutch Set-Up
* 40 Lb. 10" Flywheel
* Hurst Shifter
* 8 3/4" Rear
* 6-Leaf Rear Springs
* 4.56 Gears
* Kustom Headers {Fenderwell}
* 8" Wide Slicks

* Performance ........ 14.10's @ 98 MPH

 

[Abodybomber]

Year 1969

Sleeper Compact Wagon

1964 Plymouth Valiant V-200 'Station Wagon'

* 1967 > 273/180 HP 2-Barrel Engine
* {8.8-1} Compression-Ratio {Flat-Top Pistons w/Notches}

* Cylinder Heads 'Closed-Chamber' {#2658920}
* Milled to 51.3 CC's to get the Compression-Ratio to {9.8-1}
* Ported-and-Polished
* Competition Valve-Job

* Crower 'Mechanical' Camshaft
> .477"/.477" Lift ~ 280*/280* Duration ~ 56* Overlap




Custom fabricated 3 x 2-Barrel Intake from 'General Casting'

Carburetors from a 1964 Pontiac GTO 389/348 HP 'Tri-Power'
* Rochester Carburetors
> #7024178; Front
> #7024175; Center
> #7024179; Rear
> Total CFM's = 767

* 4-Speed {A-833}
* Schieffer Clutch Set-Up
* 40 Lb. 10" Flywheel
* Hurst Shifter
* 8 3/4" Rear
* 6-Leaf Rear Springs
* 4.56 Gears
* Kustom Headers {Fenderwell}
* 8" Wide Slicks

* Performance ........ 14.10's @ 98 MPH

Nice sleeper combination.(thinking outside the box, I like it.)

 

[cuda64]

So while everyone is on the subject, im running a 64 273 my brother has a crane cam for a stock 340. Would i be able to run that ? Will i have to change lifters and pushrods ? I know i have to find the special (early 273) intake for it already, would it be best to change heads will that lower on compression to much ? Thanks everyone

 

[Hipo65]

If you use the 66-67 273 heads it wont change the comp raito at all & opens the door for intake manifolds! & yes that cam will work in there. my dads 273 in his old belvedere used a small crower solid cam that was close to stock 340 specs. you will need @ least a true 2500 stall to work correctly if not a little more. Also if anyone has seen or head of this 67 belvedere (above) please let me know! it would floor him to know its whereabouts! last known in southeast Ne. mid 80's