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Custom Tune for E85?

ssimps0n

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ssimps0n Enthusiast

ssimps0n

Posted
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Its my understanding that E85 will result in lower mpg but is anywhere from 100 to 105 octane. Would a custom tune (wait4me) be able to improve on this. Its my understanding that Jesse can tune for 91-93 octane and get nice MPG improvement as well as added HP. Would running E85 (with a tune) get you the same results as maybe running 87 octane (MPG wise)but with the added benefit of higher HP?

It is also my understanding that FlexFuel vehicles have larger fuel pump and larger injectors, diff sensors. Would it be possible to open those things up with a tune when running on regular gas? My 5.3 seems to be a little quicker stock than most and wondering if the larger fuel pump, injectors would be the difference?

 

Just some thoughts I have been pondering...

BlueTahoe Enthusiast

BlueTahoe

Posted
Posted

I'm not sure if you can get a tune specifically for E85 fuel. I did have a westers tune on my 03 tahoe and I was still able to run E85 in the Tahoe. I had the same basic results with the E85 as regular fuel. I had a 93/91 hot tune. E85 in general got me worse fuel mileage then 93 octane but the tune improved my E85 mileage from 12 to about 14-15 and my 93 octane mileage from 15 to about 17-18. So it will help your mileage but I don't know if they did a tune specifically for e85 if they could make it even better. My hunch is yes they could me more aggressive with the timing and fuel changes because of the high octane if you are running only E85 but you could severly limit the flexibility of the vehicle because you could do serious damage (detonation) if you had to use regular fuel. And E85 still isn't available in all markets. Best bet would be to call your programmer of choice. Based on everything I've read it sounds like all the major programmers (wester, nelson, Wait4me) are very helpful when your trying to pick the best tune for your needs.

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