E85 tune with 4" and 3.5" pulley on whipple 3.4

[alpha06]

Should the fuel curve and timing be different on these 2 different pulleys on a 3.4 whipple on E85? Or can both pullies be used with the same tune?

 

[watman02]

You can use both puleys for the same tune if you want but if you want to change max timing or fueling that would need a different flash in ur xcal. Or if your loads were that much different you could just change the rows that are affected.

 

[alpha06]

So I guess it's fine then? I just thought with more boost you would need more fuel to be added

 

[watman02]

Tune the car with the small pulley and then if u go back to the bigger one it will be fine. As long as ur desired fuel and timing are the same. You will just be pulling in less air