When I want to lean out the %change to fuel/air Vs rpm AT WOt which way do i go ? do i want to make the number smaller or larger ? and what is a good amout to chage it by 5% 10% ?

 

Leaning is having more air to fuel. So a 14:1 a/f mixture would be leaner than a 13:1 a/f. Not sure about doing it yourself, I think a chassis dyno would be able to tune it better for you.

 

I think he means which way to take the values in the PE table. You want to subtract (or make them smaller) in the table to lean out. Even if you go into negative numbers. Best to do it on a dyno with a wideband or if you have your own wideband though. Can't help you on %. Depends on your setup. Just make some very small corrections at first and see what it does, then that will give you an idea on how much of a correction you'll need.

Ken R.