As title, can a rich tune for wot (10's a/f) cause the piston rings to prematurely go bad? What are the target wot a/f for most of the common gas used today (91, e85, c16, methonal, ECT...) most people say 11.8 a/f. Is this target a/f okay for all the gas type.

 

any tuner help

 

yes if you constantly run at 10:1 you will damage the engine.

if the engine is n/a you want to target about 13:1 at WOT. under boosted application 11.5 to 12:1 would be ideal and safe. using pump gas.

e85 and race fuels will require more fuel......how much i don't know.

 

Anyone know the target wot a/f for c16 to e85?

 

ask the same question here: https://honda-tech.com/forums/engine-management-tuning-124/

someone there should give you the right info on those fuels.