Anybody ever use the HC Flattops on a Sammy 1.3 EFI. The EFI version of the motor is a G13BA. The pistons are already flattop. Are the Hi compression pistons only used on the carb version?
I have to replace the pistons anyway (long story) any thoughts on brand normal compression HC I'm thinking 20 over.
If the Hi compression pistons work will I need to run Hi Octane?