CR with what headgaskets..
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CR with what headgaskets..
Im looking to bump the CR up just a little on my h/c install and was wondering what would help, could I go with a .040 Cometicgasket to bring it up some? I am installing the MTI S2E heads on the stock shortblock..Im unsure as to what the CR will be just installing these,Im assuming as they are unmilled to will remain the stock CR..Thanks
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Originally Posted by ramairstyle00
why not mill them .030?
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Originally Posted by jrp
i can see that but what CASTING, the S2E's come in 5.3, 5.7, and 6.0. all which give you a different compression ratio.
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Originally Posted by jrp
with the .040 gasket and unmilled 5.7's your looking at a .2-.3 bump in compression. hardly worth it to me. mill the heads instead, should of bought the 5.3's if you wanted more compresssion.
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Originally Posted by House347
well, I wasnt look for a huge jump in compression as I do not want to run race gas, just thought I could get a little by going to a different gasket..Also with milling the heads wouldnt I lose the ability ro run a larger camshaft, Im going to be running something close to .600 lift..Im fairly new to the LS1 cars, this will be my first "street car" and Ive got certain things I just dont want to deal with and anything but pump gas is one of them..
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Originally Posted by jrp
good pump gas can easily be run on a setup with 11.1 compression tuned. your not even close to a point where race gas is needed. yes, milling will loose crucial pistion to valve clearance, one reason to go with the 5.3's if you want higher compression.
#14
Originally Posted by jrp
good pump gas can easily be run on a setup with 11.1 compression tuned. your not even close to a point where race gas is needed.
Thanks
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Originally Posted by V8er
jrp, what is "good pump gas"? I will be running 91 octane (not Cali stuff) in my car and would like to bump compression past stock but don't want any detonation issues! I was going to use the .040 Cometics but maybe I can get away with milling the heads .030?
Thanks
Thanks
#16
Originally Posted by ramairstyle00
as long as you have a "safe" tune, you will be okay..... just don't put your foot down while under 2k rpm or it might ping a little bit
#18
Originally Posted by ramairstyle00
if n/a, it won't hurt much. my buddies mustang pings all the time if you put your foot down in OD with the a/c on........ been like that for over 2 years and hasn't had a single problem. just be aware and nothing will go wrong