well, talking to a friend about types of pistons and what CR it will yield in our R's when we thought about the JDM Type R pistons (11:1 CR) and we're wondering what the CR would be on a usdm R, if anyone knows it'll be much appreciated, thanks.


[Modified by Spoon97R, 6:42 AM 5/2/2002]

 

should be 10.8 for usdm, right?

 

Oh what i meant was what the CR would be if we installed the JDM integra Type R pistons into the usdm R's, sorry for not being more clear on the subject matter.

 

What I think he is asking is that if he puts in JDM ITR pistons in a B18C5 what will be the Compression Ratio.

 

If you put JDM ITR pistons in your USDM ITR it'll be the same compression as a JDM ITR engine..

 

oh, sorry . anyway, should be the same? since the block and also bore/stroke are same.

 

So what you are saying is that if Spoon97R put in JDM ITR pistons in a USDM B18C5 and nothing else it will yield him 11.1 CR just like the JDM ITR.

 

yes

 

eh, thats what i thought, but alot of people had me going that it would raise the CR if i got JDM R pistons(past 11:1 CR), i dont know where all those rumors came from, so i got a little confused ;p thanks for the answer!

 

thats the mayor difference between a us itr motor and a j spec the pistons , everythign else is much the same.

 

Simple way to find out:
http://www.c-speedracing.com/howto/c.../compcalc.html