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?
Printable View
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.Quote:
Originally Posted by jetmech
http://www.csgnetwork.com/compcalc.html
Thanks pl4yboy.Quote:
Originally Posted by pl4yboy
LS1 and 317 head with stock 6.0 gasket give you 9.2cr. That was my old set-up.
what are the stock values for that calculator playboy? :lol:
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?Quote:
Originally Posted by aaronr
I posted a calculator for a reason. Don't be lazy, you have the tools right in front of you.Quote:
Originally Posted by jetmech
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.
I'm still looking for the rest of the info the calculator calls for.Quote:
Originally Posted by pl4yboy
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.Quote:
Originally Posted by TXsilverado
317's have a pretty thin deck dont they? I always thought they couldn't be milled anymore than just making sure they're true
lol, changing gasket thickness does the same thing as milling .010 off.
While we're at it, anyone know the pin height of an LQ4?