they told me that type r piston dont fit into a gsr block unless u bore out is this tru?

 

They fit fine. Search next time please.

 

the rods may not attach directly to the pistons... but they will fit, u might have to shave the rod or something.... i think thats the case...

 

what oem piston do u recommend for a gsr block its doesnt matter if its jdm

 

depends what ur going for...i.e. turbo all motor etc

 

ok for all motor what would u say and also for turbo

 

turbo? ls pistons i guess? all motor, ctr.

 

The type R pistons fit the GSR block and rods fine. I should know 'cause I
have just that in mine.
all-motor: GSR block bored .25 over with oversized CTR pistons and cams.

 

i would say CTR for sure thats what i am running. they are great IMHO

 

ummm it sounds good ctr cuz i seen other ppl do it ok but this is where i get lost gsr is a 1.8 and ctr is 1.6 so do they fit as a bolt on?

 

i was told that the ctr piston will fit directly in with no problem...but be wear that ctr piston will bump your compression high so you want to up grade other things too at teh same time...to run safe at high rpm...But i was only told that....i know that you need piston rings if you get new piston and you need the robs pressed in....I'm also wondering has anyone ran a gsr longblock stock with ctr piston in there with no tuning?

 

With a stock headgasket, a stock P72 head, and PCT pistons, a GSR engine will be at about 12.7:1 compression. C-speed says otherwise but they don't take into consideration the compression height differences between the PCT's and the P72's.

 

Don't run the OBD2 ecu if you're trying to tune with cams, high compression, etc.
Also, don't tune without at least keeping an eye on the air/fuel ratio.
You'll also need to run a much colder spark plug with the higher compression.
My stock spark plugs are almost turning white and I'm just running the ITR pistons.

 

sorri to take the thread but just wondering is it ok to put in ctr piston with stock everythin else besides intake?