I'm so pissed, I just replaced the shortblock on my car and the fucken rings are shot. So I figure its time to upgrade to more compression, screw it.

I'm looking for CTR pistons stock bore for a Type R block. Does anyone know a shop that has them in stock? If not I guess JE 12:1's would do. I need the rings too. I need em ASAP! thanks

 

I got a set of stock bore CTR pistons on ITR rods all you need is rings.
email me if you interested.

 

damn if you would have responded 5 minutes sooner I would have bought them off of you..

I just ordered from Mike K. Thanks anyway.

What do you think compression would be with a gsr head milled 20. 12.5:1?

 

13:1 or over

 

whoa , that's a wee bit higher than I expected. screw it you only live once.

 

That's the spirit!

 

lol

 

 

ctr's in a gsr is like 12:1 max...does a .20 mill really up it more than 1 point?

 

CTR's in an ITR are 12.2:1 in a GSR 12.6:1 With the milling he will be over 13:1 like Steve said

 

I am sort of new to car tuning....

What will have to be done to strengthen the engine to handle a 13:1 compression ratio? I would think that a jump from 12.XX to 13 would be significant. Can he run 94 octane with that ratio or only race gas?

It just doesnt seem that the regular connecting rods, block, etc. can handle the extra pressure. Thanks for your answers in advance.

 

It can handle it fine assuming he doesnt have any detonation problems which
I suspect he will have without significantly higher octane.

 

Ahhh... 13.1 and he says screw it.

I love it!!!!

Pete

 

I guess you'll need lots of octane booster or run on race gas all the time

 

maybe i should run 2 headgaskets to knock down some of the compression.....i'm kinda getting nervous now, lol.

 

...guess we'll see if he can "fit and tune" it to work...

 

You could always get a 1mm Toda Head gasket to drop the compression down 0.4

 

That sounds like something I'll do. I'll call you to order next week or tomorrow. How much are one of these?

 

Why not get the JDM ITR pistons?
In your case, the JDM ITR's would increase your CR to almost 12:1

Toda head gasket is $195.