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Old 04-29-2013, 01:53 PM
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Originally Posted by ss307 View Post
If I use a .028 head gasket the ratio is 10.87:1, but my quench will be .058. That seems high for pump gas. I can still get 9.86:1 compression without milling the block and using flat tops.
I have no idea why you seem so hell-bent on using a lot of static compression ratio in this motor. Current thinking puts the cap at 9.5:1 using iron heads and 10.5:1 using aluminum heads.
Using excessive SCR with iron heads will require that you pull all the ignition timing out of the motor to prevent it detonating itself to death and there goes all the power that you thought you were building by using a high SCR in the first place. Build it 9.5:1 with iron heads, use a cam with somewhere around 212 degrees intake duration @0.050" tappet lift, narrow lobe separation angle (108/110) for more power at the bottom, wider lobe separation angle (112/114) for more power at the top, 1 1/2" long-tube headers for good low end torque and horsepower in this small motor, 16 degrees ignition advance at the crank, 20 degrees centrifugal advance all in by 3000, stock converter and stock gears. 600 cfm vacuum-secondaries carb mounted on an Edelbrock RPM, Holley #300-36 or Weiand #8016 intake manifold.

Your combination of parts will never make a race horse, but it will make a good plow horse if you pay attention to detail.

Last edited by techinspector1; 04-29-2013 at 02:00 PM.
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