If I were to put say... a 2.6/3 mm head gasket onto a 96 GSR, is there an easy way to tell what compression will be changed to? Sorry, but I was hoping maybe somone has already done it and knows. Thanks :cwm27:

I found this http://falconperformance.sundog.net/compcalculator.asp

And this....
7) CR = COMPRESSION RATIO = CYL. VOLUME @ BDC ÷ CYLINDER VOLUME @ TDC = 1 + (SWEPT VOLUME ÷ VOL @ TDC)
= 1+ (0.7854 x BORE x BORE x STROKE) ÷ (CCV + HGV + PDV)
CCV = Combustion Chamber Volume, in cubic inches
Note: if volume is given in cc’s then ÷ 16.4 to get cubic inches.
HGV = Head Gasket Volume, in cubic inches,
= Head gasket compressed thickness x 0.7854 x bore x bore
PDV = (Piston Deck Volume) + (Piston Dome Effective Volume)
= (0.7854 x bore x bore x deck to piston distance) + (volume of piston depressions - volume of piston
bumps) Example: What is CR of the engine in #6 above, if heads have 64 cc chamber, head gasket is compressed
to 0.040 inch and flat top pistons give 0.025 deck clearance at TDC? CCV = 64 ÷ 16.4 = 3.90 cubic inches
HGV = 0.040 x 0.7854 x 4.030 x 4.030 = 0.51 c.i.
PDV = 0.025 x 0.7854 x 4.030 x 4.030+ 0- 0 = 0.32 c.i.
CR = 1+ (0.7854 x 4.030 x 4.030 x 3.48) ÷ (3.90 + 0.51+ 0.32) = 1+ (44.39 ÷ 4.73) = 10.38 CR

Never mind you A-holes. I figured it out. It'll make me car a little more turbo friendly.... aaaarrrreeee...

Too many numbas for our wittle bwains to handle lol
So you're saying it will lower the compression right, since it'll be more turbo friendly..

Well what did you come up with? Inline-pro claims that their 3mm HG will lower the CR one whole full point.

I understand :thumbsup:
I just used this... http://www.c-speedracing.com/howto/compcalc/compcalc.php

It says it'll lower it over 1.6 points, but... maybe it'll get compressed once its put on and used for awhile so it won't be a full 3 mm, and perhaps maybe thats how inline got theirs. Anyways, since it should increase the chamber it'll lower it a decent amount, correct? whether it'll be as much as this site claims, Im not sure.