I'm new to this board, but so far it seems that all the real tech is to be found in the ITR forum or the F/I forum. So I'll ask a few questions here and hope for some good answers.

I'm currently running a stock '00 B20/VTEC with a lightly ported '01 GSR head, ITR valvetrain, spec A's, gen II gears (0+ int 0+ exh), ported JDM header, test pipe and 2.5 inch mandrel bent piping into an APEXi N1 muff. AEM CAI (for ITR), AEM fpr, '95 GSR ecu, RC 310's, and, MSD 6AL & blaster coil.

The car runs excellent and has tons of torque and top end power as well. After quite a few broken axles, I've already run mid 13's at over 100 mph on Nitto 555R's and would like to experiment with nitrous to get my car into the high 12's. Can anyone here tell what compression ratio my car has? The guy that assembled my frankenstein said it's 9.8 to 1 with a stock GSR head. Is that true? If so, how is it that my car runs so hard? And if my compression really is that low, is it safe to shoot the motor with a 75 shot wet? Thanks in advance.

 

what pistons do you have?

 

Stock B20.

 

Has the head been milled, are you using stock pistons?If you are running stock pistons and unmilled head then it should be the stock compression for a B20 engine. What that is I do not know.

 

The head is not milled, but it is lightly ported. The headgasket may be thinner than usual as well. I thought '99 and up B20's had higher compression than 96-98? Is that true?


[Modified by Buzzsaw, 6:48 PM 4/30/2002]

 

Anyone?