I'd really appreciate your opinions on the piston clearance for the CP 11.5 stock bore pistons clearance.

The paper that came with the pistons says 0.0030 and my mechanic recommended 0.0035

the car is stock with the exception of the CP pistons + BC Rods & I'll be using AEM ECU

P.S I'm installing cast iron sleeves so no problem using these pistons

thanks alot in advance
Ali

 

If they are advertised as 11.5:1 compression, you'll be fine, I'm over 12:1 and running stock ECU with no problem lol. You should be fine for N/A (Normally Aspirated) use if reliability is your main concern. Hope that helped.

EDIT: Just noticed your location, you may have to consider the conversion rate for your RON fuels vs. our Octane-rating scale and see what's plausible based on other people's account. I'm running 91 Octane with no problems at all.

 

dagel, youre running 91 on 12:1 compression? how much timing had to be taken out? id even be a little sketchy running 93 on 12:1

 

91 is the highest we get in CA, and actually it's something like 12.5. Not sure, timing's set automatically via the AP2 ECU lol