Ls1 cr

[jetmech]

Just curious here, but what heads would one use to get about 9.5:1 CR on an LS1? 317's maybe? And what is the stock CR on an LS1?

[pl4yboy]

Just curious here, but what heads would one use to get about 9.5:1 CR on an LS1? 317's maybe? And what is the stock CR on an LS1?

I am going to save all of us a lot of trouble. Here is a compression calculator. Google can answer any questions you have about the information it asks for.

http://www.csgnetwork.com/compcalc.html

[Chevy-Art]

I am going to save all of us a lot of trouble. Here is a compression calculator. Google can answer any questions you have about the information it asks for.

http://www.csgnetwork.com/compcalc.html

Thanks pl4yboy.

[aaronr]

LS1 and 317 head with stock 6.0 gasket give you 9.2cr. That was my old set-up.

[oleshifty]

what are the stock values for that calculator playboy?

[jetmech]

LS1 and 317 head with stock 6.0 gasket give you 9.2cr. That was my old set-up.

Now that's the kind of answer I was looking for. Thanks dude. BTW, which heads will get an LS1's CR a little higher than 9.2?

[pl4yboy]

Now that's the kind of answer I was looking for. Thanks dude. BTW, which heads will get an LS1's CR a little higher than 9.2?

I posted a calculator for a reason. Don't be lazy, you have the tools right in front of you.

By the way, LS1 with 243s is 10ish. If 317s are 9.2, there is not really anything in between that is worth a damn. You can have the 317s milled to raise compression.

[jetmech]

I posted a calculator for a reason. Don't be lazy, you have the tools right in front of you.

I'm still looking for the rest of the info the calculator calls for.

[TXsilverado]

you can play around with the gasket thickness and milling to get the exact CR that you want.

[jetmech]

you can play around with the gasket thickness and milling to get the exact CR that you want.

True. While I don't mind using different thickness gaskets, I'd like to avoid milling heads because I don't want to have to get different length pushrods.