i am about to purchase some CTR pistons for a deal i couldnt refuse. i have a couple of questions:

1) what would the compression ratio go up to in my GSR motor after the install?

2)how much more HP should i gain?( i have i/h/e,skunk2 cams(pending install),cam gears,venom injectors,VAFC, blah blah blah

3)is boreing nessicary?


TIA

 

do the rods while you are at it

 

your compression would be around 11.8:1-12:1 depending on wheter or not you mill your head. also, boring would be a good choice, but if your cylinders are still in good shape, then standard bore will be fine. you will make good horsepower with this compression, just make sure you tune your car.

 

If you do not bore it, you must clean the cylinder walls. You can have it honed.
As for compression, according to calculations, should be in the 12.7 neighborhood.


Jason

 

good lord! i didnt realize the compression ratio would be that high! me thinks i might reconsider....

 

If you are properly tuned, you should not have any problems...


Jason

 

dont' reconsider! more compression, more power!
whats a little detonation!

hahah get a safety device like JS safeguard...their dirt cheap nowadays
and carry a bottle of NOS, nos octane booster

 

You could go with a thicker headgasket to drop the compression a bit.

 

thanks for the input guys. one more question.....is it ok having that high of compression on a daily driver? i drive about 50-60 miles 5 days of the week!

 

Now you'll just get there quicker. I wish i could to that to my car. But it's my only car and it's DAILY driven Oh well maybe when i get married. Maybe if i found a shop i could take off from work to get it done. So the CTR pistons are a direct replacement? you don't need to bore the cylinder?