408 stroker HELP
Jul 13, 2009 | 02:10 PM
#1
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
Jul 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; Jul 15, 2009 at 05:00 PM.
Jul 13, 2009 | 09:39 PM
#4
Jul 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.
Jul 14, 2009 | 11:12 AM
#7
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Jul 15, 2009 | 04:59 PM
#10
I was given mis-information...just did some searching and found out that coolant goes through the block then up to the heads...it is a conventional cooling system. Sorry about that....gonna go modify my posts...