4age+e85= ???

[jay70]

is anybody running e85 on their 4age? I'm running my 180 on it now and it's given around 100hp extra, obviously there will be much smaller gains on a non turbo but interested to see how much of a difference it makes

[Konakid]

Only worthwhile doing on N/A if you run higher compression really

[Delazy]

As above...needs to be running 13:1 CR to see any solid power gains...it will however run cooler and cleaner...while being a prick of a thing to start...not worth the effort

[sundee]

Exactly.... There is only so much advance a motor will take.
you can achive 100% VE with a force fed engine, but not even close with an NA.
E85 suppresses knock.. So more boost + greater advance timing
But NA you can only dial in more timing without increasing VE, to do that in an NA you increase compression ratio.

[sundee]

Sorry - VE is volumetric efficiency.

[Prime86]

Interesting...So there is no benefit running an N/A engine on 105-108 octane fuel that burns cooler?

[AJPS]

a stock NA engine.

considering the increased difficulty in getting it, the increased consumption and associated pumps and injectors, not to mention cold start its not worth the hassle,

on a high comp NA it is great from all reports and is the way of the -near- future

[Gunner]

anyone ever considered the extra volume of the fuel in the cylinder, and the needs to overcome it?

[Prime86]

I agree that in a stock motor the benefit of running E85 would be minimal and not worth the expense or effort.

When you lift the comp to around 11.5:1 a 4age is on about the limit of pump gas. You can only lift the comp so far before your forced to run a higher octane fuel like E85 or Elf etc. Running a fuel like E85 allows you to bump up the comp and timing to make more power so I would say yes it's worth while in race engines etc running high comp the fact it runs cooler is a bonus. It's also only around $3 a litre verses Elf at $8 for the same octane rating.

[Matt]

on the new 86's there have been a few tuners claim to get 5kw gains. Hardly worth the effort IMO

4agte or fa20T definately