no it will make it roughly 7.7:1

Quote: Originally Posted by 86SLVLT So if the .73 drops the comp for 8.5ish in a na motor does that mean the .51 takes the comp up in a turbo motor to around 8.5? No, .51 is roughly the same size as a standard HG, to increase compression you need to shave the head or deck the block. the different between turbo motor and NA motor is the pistons not the HG thickness.

Ok. I didnt know that was how thick the nissan gasket is. I dont want to raise the comp. Thanks

Quote: Originally Posted by 6BOOST The abundance of performance gaskets on the market in multi layer steel would to me indictate that standard style gaskets like the stock nissan item are not the best. I'm sure they have done their job on many many fast cars, especially VL's, but to make very good power, they need to be O ringed, and even then, there is 1500-1700hp 2J's and the like that have nothing more than a cometic gasket with no O rings and no problems. 1 less machining process, and the cometic comes in a range of thicknesses, so for those that are running an NA conversion, they can keep the stock engine and lower the comp to appropriate levels, something you can't do with the stock gasket. 6BOOST i have a fully prepped block with o rings and im having nothing but troubles with copper head gaskets. i just want to know what other head gaskets i can use other than copper???

stock i think. i have seen other engine with o-rings that run stock head gaskets not to sure about vlt though. Quote: Originally Posted by DENTED i have a fully prepped block with o rings and im having nothing but troubles with copper head gaskets. i just want to know what other head gaskets i can use other than copper???

^^^ so far ive back tracked through about 20 pages looking through every head gasket thread n from what ive read i think ill have to use a stock nissan one???

Yes use the stock nissan gasket, they work and its proven with or with out o-ringing, personaly mine was o-ringed and running around 37 psi when tuned on c16 and was fine for years, mind you the standard head bolts stretched during a dyno day at rajabs and pressured up the cooling system when on full song, but fortunately it was still fine with no issues many years after that!!! apparantely this is fairly common with high combustion pressures!! good head studs fix that tho!!!

sorry to bring up a old thread, but if i was to use a acl head shim, i would use 2 head gaskets wouldnt i?