This has probably been discussed before but I need to make a decision with an engine repair. The car is EVO4 and only for track use running 7 injectors and ECU and 15lb boost. I cracked all the ring lands off between the top and second compression rings. I know it's detonation but since I am repairing I am looking for advice on peoples past experiences with these 2 piston types. I want about 350HP at flywheel so not expecting big power but also want reliability as this car has the accelerator to the floor or on the brake no in between.

 

4032 doesnt expand as much vs heat and can be run with slightly tighter PTW. We run 2618 Wiseco in our builds.

 

2618 is somewhat softer/malleable, which makes it more resistant to damage from detonation. Definitely a better choice for our FI engines...

 

I went for what I could get and settled for 2618 Manley. The reason being is the others required honing the cyl to clearance and I wanted them to fit std bore. I couldn't find much info about Manley but I didn't find any negative comments also. They will arrive in Sydney on Monday all going well.