Presently running E85 with twin 340 pumps and bosch 127lb injectors. I'm out of pump and injectors plan on going bigger and completely new this winter but would like to run 114 the rest of the season so I don't have the car down from now until spring.

What is needed to the tune to switch? I know the obvious which is less fuel but is there any steps to switching? Thank you any help is appreciated.


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Stoich of Sunoco 114 unleaded is 14.8 so start by pulling about 30% fueling out of your tune. Drain all the corn out, fill with racegas. Log for KR, check PE at WOT, rinse and repeat.

Never ran it so not sure on the PE ratio, prob a bit leaner than corn. Not knowing your tune or application we'd have to guess at the timing.

 

Just question if it's as easy as pulling fuel and adjusting the timing? I tuned it for E85 but never had the bosch 127lb injectors running on gas. I'm going to run 114 so the timing should be in the ballpark to start.

 

If the injector data is good you should be close enough at idle for it to run. Expect to have to retune it though. When I went from 93 to corn on my old injectors (ID850's) I had to tweak in everything several % with the 30% fuel increase. I would expect you to have to do the same on the decrease.


Stoich is different but it's still fuel.

 

Thank You