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E85 Fuel On V8

West

By West,
in Engines & Forced Induction

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Lithium Grand Master

Lithium

Posted
Posted

Fuel doesn't have any idea how many cylinders the combustion chamber its being squirted into is joined up to ;)

Ultimately the harder the work the fuel has to do, the more E85 comes into its own... but you can still definitely get gains. I've seen from 3-7% from E85 on a naturally aspirated engine, depending on a variety of things. The most magical results I've seen are on highish compression turbo setups running a bunch of boost though.

With a relatively stock V8 I'd say the extra fuel usage would outweigh the gains, unless you have exhausted all alternatives and not worried about the ~35% extra fuel usage - and the fuel system upgrade you are likely to need to do to support that fuel usage.

If you were going to drop a decent turbo or two into the mix then E85 very quickly starts coming into its own.

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Birds Grand Master

Birds

Posted
Posted

Any engine tuned to run on E85 will see some power benefits, but these benefits are much more obvious with engines that are prone to detonation or high heat, as high octane and reduced temperatures are the mainstay advantages of E85 over unleaded. Thus forced induction engines benefit greatest from it, but there's no reason you can't advance the hell out of the timing on an N/A V8 and see some good gains there.

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ARTZ Grand Master

ARTZ

Posted
Posted

6% is still 6% , is that throughout the revrange or just a top end figure..I was thinking e85 could help gain some midrange..

My missus has a 3L Accord. its a zippy tank. but unfortunatly there isnt alot that can be done with it as the auto box is subject to failure even in stock form.

I think the comp ratio is 10.1, Now I read a thread where a guy just filled his up with E85 ,with stock everything and no additional tuning he was pulling at least a car length on a similar car on pulp..he ran it for a while with no issues but finally saw reason that it might not be the greatest idea without a proper tune

I have been very tempted to get an emanage or something, open up the exhaust a little and just tune for e85 to see what gain could be had..A 10% top end at absolute best, would be all I would expect, but more importantly I am interested in the low to midrange gain it could have as that is where it gets driven most..

i have been running it on e10 for ages without issue and getting great fuel economy as well, almost equal to BP98.

There will be little gain with stock compression. Chuck some 13:1 comp pistons in and it'll be a whole different story!

And biannual headgasket replacements...lol ..this was always the best way to make a V8 (or any NA for that matter) move anyway

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ARTZ Grand Master

ARTZ

Posted
Posted

Well all you really need is a bigger pump and maybe a bit of extra pressure should work to some extent..At worst you get bigger injectors...

But i see where your going, Injectors,pump,piggyback,your looking at least 2000$ for for only a 5-10% increase...

Though if you already have these mods in place you have nothing to lose..and plenty of people have spent more for less

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