408 stroker HELP
07-13-2009, 02:10 PM
#1
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408 stroker HELP
hi guys building a 408 stroker. Im confused about compression. Using 243 heads and a weisco carrillo stroker kit. If im driving this on the street, They say i have to keep it down to 10.5 to 1. I dont understand why not 11 to 1. something about the octane. Thanks for any help
07-13-2009, 06:53 PM
#3
I was talking to some engine builders last week, and the consensus was that the GM GenIII engines can squeak out a little more compression on the street. You have to look at the camshaft profile also, as a cam with more overlap will have a natural EGR effect and therefore have lower cylinder temps, and also allow for (and sometimes require) more compression.
Last edited by budhayes3; 07-15-2009 at 05:00 PM.
07-13-2009, 10:41 PM
#5
I was talking to some engine builders last week, and the consensus was that reverse flow engines (such as the GM GenIII) can squeak out a little more compression on the street. You have to look at the camshaft profile also, as a cam with more overlap will have a natural EGR effect and therefore have lower cylinder temps, and also allow for (and sometimes require) more compression.
07-15-2009, 04:27 PM
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Their not reverse flow. They dont have water flowing through the intakes anymore . If you hold the top hose youll feel that it gets hot from the engine end first same as before.