CTR pistons in a Integra Type R block yields a 12.2:1 compression ratio right? Is this ok with 92 octane gas? Thats all we have up here in Vancouver, WA. If anyone has done this, how do you like them?

 

it can be done, but your going to have to pull a bit if timing out, and i would recommend getting a J&S to monitor knock.

 

i'm pretty sure CTR pistons in an R don't yield a 12.2:1 compression

its around 11.5:1

 

12.2 sounds about right for CTR pistons in a B18C. This set-up will ping itself right into destruction on pump gas. My cousins car has 12.5 to 1 JE's in his GSR motor and it pings with 100 octane CAM2. He has to run 116 leaded race fuel in his car at all times. Pretty impractical for the street though. Then again he does have the timing adavnaced and runs Haltech stand alone. But either way high compression isn't very street friendly.





[Modified by H-PIMP, 1:06 PM 9/26/2001]

 

I have CTR`s in an ls/vtec (b16 head) and it`s fine w/ pump gas.

Ryan

 

Atleast you need a FPR thet you can dial up the fuel pressure so you won't end up with any problems.

 

The compression with CTR pistions in a B18C is 12.2:1 you should be fine on 92 pump gas......

 

Does anyone have any dyno runs before and after with these pistons?

 

1.0 increase in compression is a increase of 4% in power.

 

hey guys, i'm also interested on getting some ctr pistons for my R. my car is already 140.000km so this would be a good time to change them. i ran .98 actane all the time so pinging souldn't be a problem, my question is, wich boring should i get? - standard or .25 over-bored?
one more question, is it better to buy the balanced ctr pistons, they're almost the same price..?

 

The B16A and the Type R head are similar except for the shape of the combustion chambers which would give the B16A slightly lower compression..right?


[Modified by ITRbroham, 9:03 PM 10/15/2001]

 

The ITR head is a B16 head that has been rebowled. Nothing else is different.