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Running E85 On My Car Is It Worth It

adam Foster

By adam Foster,
in Engines & Forced Induction

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adam Foster Mentor

adam Foster

Posted
Posted

i have an rb26 with 555 injectors garrett -5 turbos, autronic computer and aurtronic cdi 15psi.

will i get any gain on e85 or is it not worth it.

dont have time to get the tune changed.

Shazza24 Proficient

Shazza24

Posted
Posted

i have an rb26 with 555 injectors garrett -5 turbos, autronic computer and aurtronic cdi 15psi.

will i get any gain on e85 or is it not worth it.

dont have time to get the tune changed.

Needs to be tuned and likely bigger injectors, as a short answer. It will also require a couple of new fuel filters replaced periodically as the crap is cleaned out of the tank + fuel lines.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Injectors are far too small for -5s on PULP as it is...

On E85 - forget it, not a hope in hell you'll get enough out of them.

Also 1bar on -5s is kinda pointless. You need 20-24psi to really get things into the happy zone.

DVS JEZ Grand Master

DVS JEZ

Posted
Posted

No way in hell man. U are expecting e85 to run on the same tune as 98.

E85 requires atleast 30% more fuel injected into the engine than 98 so putting it in without tuning will lean ur motor out and more than likely blow in up

Piggaz Grand Master

Piggaz

Posted
Posted

Well I'm making 402 rwkw using ID 2000's ( which are actually 2250cc) at 52% duty cycle. Calculate that back it's roughly 1170cc I'm using.... Soooo not very much if that's anything to go by

zebra Grand Master

zebra

Posted
Posted

so how would sard 1000s go on e85 with twin bosch 044s surge tank and another 044 in tank on a built 26?

currently 427kw @ all 4 with a t88 on 98pulp

N1GTR maxed his 1000's at 403kws on E85 but thats on a 3L, you might be able to maintain the current level of power on a 2.6L but would be the very limit...you would get no gains and 30% more fuel usage

Piggaz Grand Master

Piggaz

Posted
Posted

so how would sard 1000s go on e85 with twin bosch 044s surge tank and another 044 in tank on a built 26?

currently 427kw @ all 4 with a t88 on 98pulp

I dont think you would make your current power. A set of ID 1600's would be spot on.

SS8_Gohan Grand Master

SS8_Gohan

Posted
Posted

It will also require a couple of new fuel filters replaced periodically as the crap is cleaned out of the tank + fuel lines.

bit of a myth IMO - my fuel filters were fine, replaced twice during the approx 18months i was on E85, even cut one open to have a look - that's 100% E85 as well, no map changes back to 98 here and there

Brezza Proficient

Brezza

Posted
Posted

N1GTR maxed his 1000's at 403kws on E85 but thats on a 3L, you might be able to maintain the current level of power on a 2.6L but would be the very limit...you would get no gains and 30% more fuel usage

I've spoken to a few people with 3L RB's and they've had much bigger gains on E85 due to the higher compression of the 3L. One bloke was telling me how the 26 doesnt have as high compression as the SR's or the RB30. so therefore the 26 can't take as much advantage of the knock resistance of the fuel.

I've had minimal top end gains in my GTR going to E85, only really made gains in the midrange. but i did get it tuned on a hot day and it still made good power. the STD intercooler is probably holding me back.

Am getting it tuned this Thursday, hopefully it will be a little cooler and get some better figures. the tuner tuned it on the richer side just in case it leaned out too much in colder weather.

So hopefully with a cooler day and leaner AFR's i can get a little more out of the car?

bit of a myth IMO - my fuel filters were fine, replaced twice during the approx 18months i was on E85, even cut one open to have a look - that's 100% E85 as well, no map changes back to 98 here and there

Have been running E85 for just under a month and going back to get the fuel filter changed. the mechanic said that my tank looked to be pretty clean when installing the twin pumps intank. so i dont think that the fuel filter would be too dirty. i might just change the fuel filter this time and if its still pretty clean i will just do it after another 6 months or so.

I've noticed that on E85 my oil has been looking much cleaner?

has anyone else experienced this?

on PULP the oil used to start to look darker, but on E85 is still looks fairly fresh.

Shazza24 Proficient

Shazza24

Posted
Posted

bit of a myth IMO - my fuel filters were fine, replaced twice during the approx 18months i was on E85, even cut one open to have a look - that's 100% E85 as well, no map changes back to 98 here and there

I suppose you could be right and upon thinking about it maybe even the initial change of the fuel filter when first going to E85 might not be needed. Ethanol as we know is a solvent and could breakdown stuff already trapped in the fuel filter but even then if it is getting past the fuel filter why worry as it must be alright to go through the injectors, etc.

In theory anyway.

SS8_Gohan Grand Master

SS8_Gohan

Posted
Posted

i'd almost be resigned to put that one into the 'corrodes fuel lines' bin...

maybe it's just completely dependent on the car? my GTT NEVER gave me any engine issues other than the normal coilpack issue, so maybe if you just have a healthy engine that's seen good oil, fuel and regular maintenance, it's not an issue.

i know i'm not the only one to not have had issues with fuel filters.

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