What are you guys running for compression ratios out there?

 

10.4:1 Static

You need to consider what kind of cam overlap you are running to determine dynamic compression ratio.

 

12.02 Scr
8.49 Dcr

 

How do I do that?

I'm looking at running a Comp Cams 226/222 .585/.563 114 LSA on my 402 stroker (4" stroke). I don't know squat about DCR, so any help you could give would be appreciated. (I did run a search just barely and came up with some informative looking threads; but honestly don't have the time right now to read them all to "understand" what's what). A "simplified" summary would be helpful.


Right now, I'm trying to decide if I want to stay NA and max out the compression, or add the STS Turbo and keep compression a bit lower. Gas mileage is unfortunately a big factor, as this is first and foremost a daily driver.

Staying CA legal is also a goal since the move to San Diego is only 3 months away now. One bonus of the turbo is eliminating the need to swap headers off and on.

 

give me the full run down of engine specs beyond bore and stroke:

bore: 4.00
stroke: 4.00
chamber volume:
head gasket thickness:
gasket bore:
deck height:
piston dish or dome volume:
rod length:
.006 duration (adversised duration)
LSA
ICL

 

I'll have to contact the engine builder and make sure I have all the specs right, so give me a couple of days.

Thanks J.

 

11:1 on 347