redciv

Im gonna make this quick.. to help ya out

95 ex d16z6 eagle rods, arp pistons stock compression stock bore

greddy kit, gonna run 15 lbs

looking to drop the 9.5? CR down to 8.5

found a cometic headgasket SOHC D15, D16, 75mm Bore, .078" Thick

just wondering if this is the correct bore and thickness to drop my cr down a point.
any suggestions are happily welcomed!!!

thank you very much in advance
Rick

tgreaves

Why do you want to drop your compression down to 8.5:1.. Your perfect at 9.5:1..

redciv

i thought that the ideal CR for a boosted car is 8.5 ??
anyone wanna fill me in??? or know the thickness of an upgraded stock head gasket.

I'm not big into the motor building stuff, sorry.. u guys r da best

IntegracinGSR

There is no said number for what compression ratio is ideal for boosting our motors, its all about preference.. if you wanted you could have 10.5 rather than 8.5:1 CR, its all about tuning..

IntegracinGSR

If it is a street car and you are going to be running on pump gas, you probably want the lower CR, say anywhere from 9.5:1 to 9:1 or you could even go with your 8.5:1 if ya really want to... but if you're going to be using higher octane race fuel and the car will be for the track then go ahead and go with a higher compression ratio and just make sure you get a good tune.. its all up to you and your goals and preferences..

Good Luck

Dan

J337_UNIT

i dont even know if you can get a headgasket which will lower the compression as much as u want... u might be able to lower it to like 9.2:1 which is equal to that of a b18b maybe as low as 9.0:1..im not 100% sure on this.. but i as well think that 9.5:1 CR is fine for boost. 8.5:1 may not be as ideal as you think.. is it safe? yes.. but everything out of boost will feel like ****.

IntegracinGSR

Agreed.. stick with 9.5:1 With a good tuner you shouldn't have any issues..