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    Camshaft and CR selection

    Hello,

    I am trying to understand better how one would select what compression ratio to shoot for depending on the cam used ? For example, if I select a 292 cam (pn 11314292 , duration 292° , lift
    10.0mm ) how would I go about figuring out what cr. to shoot for to get the most out of it ?


    Thanks








    Schrick 284 Cam For 4 Cylinder Engines

    This is Schrick’s high torque street performance cam. It gives a strong bottom end response and continues making steady power through the full rev range. It do not require cutting for piston-valve clearance.

    Schrick 292 Cam for 4 Cylinder Engines

    Our favorite all around performance cam. A strong step up from the 284. With our competition Stage 2 modifications, it will produce about 160 H.P. It does not require cutting for piston to valve clearance. Works with side draft or downdraft carburetion.


    Schrick 304 Cam for 4 Cylinder Engines

    Considerably more power at top end than the 292 cam, these are the strongest practical autocross, rally, driving school type cams. These are more sophisticated cams and obtain some of their extra power from more aggressive angles between the lobes. Additional piston/valve clearance must be cut. Use with 40 or 45 mm side draft carbs. The use of our offset cam gear listed below is highly recommended. This cam uses a standard journal diameter. A small groove must be milled by hand into the center bore.

    Schrick 316 Cam for 4 Cylinder Engines

    A semi-race cam for club competition on-track events. Nearly full racing performance but without sacrificing valve train reliability and life. Use with 45 DCOE Webers and large diameter headers. The big lobes require boring the cam journals in the cylinder head. (Korman can provide this service

    for you) This cam provides oil directly, the cam oiling tube is not needed. Additional piston/valve clearance must be cut.

    Schrick Race Cams

    For fully prepared race motors only. Many engine modifications and high compression ratio required. The 336 is for those who want to win! The 328 has a wider power band and makes a good pro rally or endurance engine type cam. Both are asymmetrical, the intake lobes have more duration and lift than the exhaust lobes. You will need our offset adjustable cam gear to set the cam timing. We won an SCCA GT2 Campionship with the 336 cam and 50 DCOE Webers making 230 HP. There is no stronger cam made anywhere for the M10 motor.

    Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



    OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

    #2
    I would think that CAM selection would not make a difference for CR.
    Originally posted by KingB
    Scratch my back and I buy a prostitute for you, to rub your balls. HAHA now thats some funny shit.

    Comment


      #3
      I should have worded my question differently maybe. Isn't there a relantionship between a hotter cam and it's potential gain given different CR ? Or is it just directly proportional to the engine output no matte what cam you choose ?
      Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



      OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

      Comment


        #4
        Maybe you are getting it confused with static compression ratio. Easiest way to explain it is like when under boost, the static compression ratio may jump to, say 15:1 even though your mechanical CR is 8.8. What cam you choose will have an effect on your SCR. Unless you're planning to design your own cam, its best just to forget about all that crap and pull out the wallet. 292 looks good.

        Comment


          #5
          I have no idea what I am talking about :) Need to get that maximum boost book.
          Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



          OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

          Comment


            #6
            You are going boost? How many miles on the M10? Just wondering.
            Originally posted by cabriodster87
            "Honey? What color is this wire? Is it the same as that one? Are you sure? I don't believe it. OK, it works. Thank you sweetie."
            Originally posted by Kershaw
            i've got a boner and a desire to speed.

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