camshaft for 225

Slant 6 Engines

  1. seaguila

    seaguila Member

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    Good afternoon, I wanted to know in a standard engine what type of camshaft can be placed to have the maximum rpm, I have a compscam camshaft (264) ... have they placed larger in a standard engine?
    Greetings.
     
  2. AJ/FormS

    AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s

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    You might first ask, what's the recommended maximum rpm for your engine.
    If you have a 225, the stroke is 4.125, which somewhat limits the rpm.... as do the stock valve sizes, as does the standard compression ratio, as does the stock porting. And forget the stock manifolding and carb.
    The bigger the cam, the higher the operating rpm, and the lazier the bottom end gets. Which leads to a higher stall TC and a bigger number rear gear. or more transmission gears.
    Or perhaps you already know these things, and your question is cuz you're building a race engine? But then you wouldn't have said;

    But then ; you did say TYPE. So then the answer is a solid-lifter roller cam; but IDK if anybody makes one for your slanty. Next in line as to type is the Solid flat-tappet type. And the hydraulic-flat tappet type comes in dead last... as to types, for maximum rpm.
    But in your case, I doubt you need to worry about it cuz all types will rev higher than your engine will, when making max power. And not all types can be installed in your slanty. At least not affordably.
     
    Last edited: Jan 14, 2020
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    • Darter6

      Darter6 Well-Known Member

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      The largest cam in a factory 225 was the mid 70's to 1980 solid cam before they went to a Hydraulic. The comp you have is a good replacement but will need valve springs to go with it. The Comp #64-241-4 has a .440/.440 lift with 220/220/ @.050 Duration.The lift on a factory cam is in the .375 ball park.
      This can be used in a basic stock 225 without any problem. If you decide to remove the head for spring replacement, You,if you have a budget for it should go thru the valves with a basic valve job.Have the head milled a minimum of .060 to .100 max to up the compression.NOW This is just for a BASIC performance improvement.
      As AJ/FormS stated above,now the snow ball effect comes into play with many more components.
       
      Last edited: Jan 14, 2020
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      • Darter6

        Darter6 Well-Known Member

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        Before you know it the "Snow Ball Effect" will end up looking like this... IMG_1932.jpg
         
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        • kesteb

          kesteb Well-Known Member

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          Yes, there are some on slantsix.org that would think that cam is a toy. There are several engine build combinations in the engine section. I would check them out. I have no idea how they will relate to what is available in Argentina thou.
           
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          • seaguila

            seaguila Member

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            I have the following K 220/220 solid energy flat chamber K kit for Chrysler 170-225 6 cylinders, I have larger valves (250 chevy, I don't remember the measurement) I have 9.5: 1 compression, 2 Holley 36-36 barrels. Pistons, vines, screws, metals ..... standard. How many RPM maximum? and with what camshaft ... I don't know if my query is understood?

            IMG_20180623_134325860bis.jpg

            IMG_20180623_134334406bis.jpg

            IMG_20180623_134342617web.jpg
             
            Last edited: Jan 15, 2020
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            • kesteb

              kesteb Well-Known Member

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              What is the suggested rpm range for your cam? It should be on the cam card.

              For example, I am using the Erson 270* cam and have the rpm limiter set at 5200 rpm. I could go higher, but choose not too.

              The head has 1.7" intake and 1.44" exhaust valves. I used the Erson cam kit for the lifters, keepers and springs. The chambers are 52cc and it has a "home" port job.

              The block is bored .30 over and has cast pistons and cast iron rings. The pistons set .140 down the bore. I had to cut the block .40 to reach that figure. The rods are rebuilt and use ARP bolts. Final compression ratio is 8.75. The block is a 1978 vintage.

              I am using a Clifford intake with a Edelbrock 500AVS carburetor. The exhaust is a set of Dutra's similar to your manifolds. The head pipes are 2 1/8" pipe that are Y together by the transmission cross member. They feed into a 2 1/2" tail pipe, the muffler dumps before the rear axle.

              This all sits in a 1965 Dodge Dart with a 1964 4 speed and 3.55 geared 8.25 rear axle. It runs good.
               
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              • RustyRatRod

                RustyRatRod Weenie idiot loser. FABO Gold Member

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                The 225 has a 4.125" stroke. As such, it is not a "high revver" and I would not try to make it one. I would say 5500 and 6000 would be my "absolute" limit. Of course there are exceptions, but those start to get into race stuff.
                 
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                • kesteb

                  kesteb Well-Known Member

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                  I guess you have never watched any of the YouTube videos from Argentina. I don't think they buy that limit down there.
                   
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                  • RustyRatRod

                    RustyRatRod Weenie idiot loser. FABO Gold Member

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                    I guess you didn't comprehend my response. I said there were exceptions. I'm not gonna tell somebody to go out and rev their engine and blow it all to pieces.
                     
                  • kesteb

                    kesteb Well-Known Member

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                    No, I understood your response. It's the stock "a 225 has a 4.125 stroke so it can't rev" response.
                     
                  • RustyRatRod

                    RustyRatRod Weenie idiot loser. FABO Gold Member

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                    Comprehension is key. I didn't say it "couldn't" rev. I said "I would not try to make it a high revver". I stand by that, because I don't like breakin stuff.
                     
                  • my68barracuda

                    my68barracuda Well-Known Member

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                    Thanks for the motor photo’s, very clean. Do you have a rear exhaust manifold on the motor that matches the front one shown? Are those easy to get in Argentina ? If so you could probably sell them to folks here.
                    Not wanting to side track your cam question, but that style of exhaust manifold is really rare up here.
                    Also, it looks like there is a line that feeds hot engine coolant to the intake manifold to warm it, can you post a photo of that?
                    Thanks.
                     
                    Last edited: Jan 16, 2020
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                    • 273

                      273 Well-Known Member

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                      You want rpm or power ? You can spin the engine way past where it stops making power especially if you upgrade valve springs.

                      head flow has more to do with how much useable rpm you can have. A 285 cam with. Stock 318 heads vs ported W2 is gonna have way different power bands even though the same cam.

                      stock /6 head or even ported don’t flow to well, you’ll have a hard time getting high rpm power out of a 225.

                      what kind of performance you looking for ??
                       
                    • RustyRatRod

                      RustyRatRod Weenie idiot loser. FABO Gold Member

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                      My question here would have to be "for what purpose?" If it's no longer producing power, why keep spinnin it?
                       
                    • 273

                      273 Well-Known Member

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                      I wouldn’t but it sound like the OP is only after revs, by the sounds of the post. Not a well setup combo, I could be wrong.
                       
                    • Charrlie_S

                      Charrlie_S Well-Known Member

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                      Kevin, in the u-tube videos I have seen, I'm pretty sure those engines that were turning up over 7,000rpm, were destroked. I tried turning one of my 170 engines to 7,000 at one time. (had a deep 1/8 mile gear, and ran 1/4 mile). Car didn't run any quicker in the 1/4 then with the 1/4 mile gear. So wasn't worth the additional beating.
                       
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                      • seaguila

                        seaguila Member

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                        [QUOTE = "kesteb, post: 1972801002, member: 39698"] ¿Cuál es el rango de rpm sugerido para su cámara? Debería estar en la tarjeta de la leva.

                        Por ejemplo, estoy usando la cámara Erson 270 * y tengo el limitador de rpm configurado a 5200 rpm. Podría ir más alto, pero elegir no también.

                        La cabeza tiene 1.7 "admisión y 1.44" válvulas de escape. Utilicé el kit de leva Erson para los levantadores, cuidadores y resortes. Las cámaras son de 52cc y tiene un trabajo de puerto "hogar".

                        El bloque está aburrido .30 y tiene pistones y anillos de hierro fundido. Los pistones bajaron .140 por el agujero. Tuve que cortar el bloque .40 para alcanzar esa cifra. Las varillas se reconstruyen y usan tornillos ARP. La relación de compresión final es 8.75. El bloque es una cosecha de 1978.

                        Estoy usando una toma de Clifford con un carburador Edelbrock 500AVS. El escape es un conjunto de Dutra similar a sus múltiples. Los tubos principales son tubos de 2 1/8 "que están unidos en Y por el travesaño de la transmisión. Se alimentan a un tubo de escape de 2 1/2", el silenciador se descarga antes del eje trasero.

                        Todo esto se encuentra en un Dodge Dart de 1965 con un eje trasero de 4 velocidades de 1964 y un eje trasero de engranajes de 3.55 y 8.25. Funciona bien. [/ CITA]


                        excelente, gracias por los datos.
                         
                      • seaguila

                        seaguila Member

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                        [QUOTE = "my68barracuda, post: 1972801043, member: 12501"] Gracias por la foto del motor, muy limpia. ¿Tiene un colector de escape trasero en el motor que coincida con el frontal que se muestra? ¿Son fáciles de conseguir en Argentina? Si es así, probablemente podría venderlos a la gente aquí.
                        No queriendo desviar su pregunta de cámara, pero ese estilo de colector de escape es realmente raro aquí.
                        Además, parece que hay una línea que alimenta el refrigerante del motor caliente al colector de admisión para calentarlo, ¿puede publicar una foto de eso?
                        Gracias. [/ CITA]


                        Los escapes venían así de fabrica acá en argentina, son fáciles de conseguir y muy baratos aca.
                        norte se a que haces referencia con la linea que alimenta el refrigerante????' la manguera que se ve color plateada es una linea del combustible que va al carburador.
                         
                      • seaguila

                        seaguila Member

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                        Excellent, thanks for the data.
                         
                      • seaguila

                        seaguila Member

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                        The leaks came from the factory here in Argentina, are easy to get and very cheap here.
                        North I know what you mean by the line that feeds the refrigerant ???? ' The silver-colored hose is a line of fuel that goes to the carburetor.
                         
                      • seaguila

                        seaguila Member

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                        Thanks to everyone for the answers, my car runs very well as it is configured, they have a 5000 rpm camshaft, I was just curious to know what type of camshaft the others and how many rpm they had.
                         
                      • Darter6

                        Darter6 Well-Known Member

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                        As far as RPM goes,I'll tell you what Jack Clifford told me years ago at a SEMA show.The 225 Chrysler engine should be built as a "Torque" engine.His theory was the head will not flow in hi rpms enough to spin it any faster than 6,000 rpm.That was 20 years ago.
                        After his death, Clifford Industries went down hill and has a bad reputation with the new owners.
                         
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                        • Slantsix64

                          Slantsix64 Well-Known Member

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                          276 duration
                          intake .520
                          exhaust.545
                          107LSA
                           
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