is it bad to use ctr pistons on a street and daily driven b18c1? what are the ups and downs? what is the best compression for a street NA car?

 

ive heard 11:1 is good
runs great on 92, but when you get to 11.5 up to 12+ you got to start worrying about detination and idle, not to mention vavle lift


[Modified by GSRdreaming, 6:51 AM 6/10/2001]

 

No you shouldn't use them. The compression ratio would
be way too high. They are only good on the B16 block.
But you CAN use the ITR pistons.

 

ITR runs a 10.9:1 does it not?(might be 10.6:1*shrug*) what does the CTR run? and 11:1 is not to bad (well gas sucks) seems to run fine to me. again why would the CTR be to much?

 

That is totally correct-your compression ratio would be too high and you have to remember that the GSR combustion chamber has a clover leaf design.

 

ok ok so that is the difference, the shape and design is different placeing the vavle reliefs in different spots cuz the heads are shaped different. hmmm.... i didnt want to pretend to know, thats why i asked. hell, i just ordered what i needed, not knowing it could be different for the B16

 

no problem

 

I run ctr's in a j spec b18c all day long on 92 octane. I have no problems. I am worried about valve clearance w after market cams though! or even cam gears.

 

what times are you getting in the 1/4 mi? any signs of knocking? what compression are you getting? thanks for the info

 

ctr pistons in a gsr head is 11.6 cr. You can have up to 11.8 to 1 on pump gas. By the way the new celica is 11.5 to 1.


[Modified by stretracr, 7:45 AM 6/21/2001]