I wonder what the different compression ratio specs for the JE pistons are.

I know there is 9:0 and 11.5:1 cr
I can use JE pistons for the GSR which gives ma about 10.5:1 cr, cause of the bigger combustion camber of the ITR-head.

What about using non-vtec B18A Integra pistons 10.5:1; 9.2:1; 8.5:1. Are they okay for my head and valve clearence and what cr ratio would they give me? What else can I chose?
Honda pistons: 11.1:1; 10.6:1; 10.1:1 (GSR.JDM); ~9.6:1 (GSR-JDM)

but Honda pistons are´nt so strang than JE, corect? Are the JE pistons for the B18A engines as strong as for the B18C ones?

Thanks!

[Modified by austrian ITR, 8:55 AM 1/14/2002]


[Modified by austrian ITR, 9:01 AM 1/14/2002]

 

I dont think you can use B18A pistons because the valve reliefs are too small. I'm pretty srue that all of the JE pistons are of equal strenght, if you are going FI be sure not to get SRP. I'm surprised JE doesnt offer a piston for the Type-R. Maybe you should try another manufacturer...I hope this was of some help to you. Later!

 

Valve reliefs are smaller on LS pistons than on ITR/GSR pistons. I don't think JE makes shelf pistons for the LS in stock bore anyways (have to order custom, $$$).

I know I have a set of 9.8:1 GSR pistons (JE, not SRP). I wonder what those would yield with the ITR head.

Dustin

 

I have a new question for ya....lets say i want to do 10:1 compression in my b18b block, what pistons should i look for....can i use gsr pistons with no problems? will a 10:1 je GSR piston give me around 10:1 in my motor? HOw bout if i sleeve it and use a 84-84.5 piston with specs of 10.5:1 witha b16 head, what can i expect my compression to be???? Thanks for helping me out!!!

 

b18c 10:1 pistons in an ls block will be about .3 higher just because of the
stroke. I dont know the volume of the ls head so i cant say what that will
do.

 

raceeng.com said that 9.0:1 GSR pistons result in about 8.8:1 in an LS. I do not have the numbers available to confirm this, but comparing compression test results seems to validate it.

Dustin

 

that would mean that the combustion chamber volume of an LS would have to be
large enough to overcome the increase in CR from stroke.

 

LS head volume is in fact larger than the gsr....

 

so i would need to find a 10.5:1 to get around a 10:1 in my b18b with a matching heador just go 10:1 with a slight mill. since the valve reliefs are larger(gsr piston) do you think that is a better way to go(miling)