s2kswe

Hi

A question popped up in my head about e85 and turbocharging.
I have been planning a turbobuild for some moths now and read alot about it. I did not find any useful info about E85 as fuel tho. I have heard E85 is more like "racegas" due to the higher octane number.

Assume I get a GT3076r or a GT3071r and install it together with all extras required. A good ems larger injectors stronger fuelpump etc.
I was thinking going 7psi (about 0,5bar) with the regular pump gas. (Here in Sweden you can buy 95 or 98 octane) This is on stock internals.

Would really like some facts about these things as there are plenty of e85 pumps in my area, and that fuel is an option if it is better for the car.
Anything else about the honda that dont like E85?

Regards from Sweden

By the way, this is taken from wiki.
E85 is an alcohol fuel mixture that typically contains a mixture of up to 85% denatured fuel ethanol and gasoline or other hydrocarbon by volume.
Depending on composition and source, E85 has an octane rating of 100 - 105

PeanutButter

Dont quote me on this, but this is what I heard.

You need really big injectors and a lot of fuel pressure.

Spec_Ops2087

correct


Not to mention its timing that E85 helps out with a lot due to it being basically race fuel not so much boost (although they are slightly proportional).

s2kswe

So what exactly are you meaning here, sorry but i do not understand.
You are saying something about that e85 helps out with the timing in some way.

deathsled

to run e85 you pretty much need a fuel system capable of double what you would need if you were running gasoline.

corners2

If someone could engineer an FSI solution with E85 you could make some good numbers.

Spec_Ops2087

I'm saying the real benefit of E85 is not running more boost but running much more timing at the same boost level as compared to regular fuel. The problem is that you need an upgraded fuel system beyond just a simple walboro fuel pump.

logicaldude777

I think Spec_Ops2087 is saying that the higher octane of the E85 provides a higher flashpoint. That means the timing can be advanced to a greater degree without detonation. E85 also has a higher heat latency (sp.). Better heat dispersal and the opportunity to add more boost than with regular pump gas.
Water and methanol injection have been used for years in turbine powered aircraft to decrease the effects of high ambient temp and high density altitude to provide a higher level of performance for a short period of time( ie. takeoff and climbout).
I drive a flex fuel vehicle as my daily driver and have noticed two obvious difference over regular pump gas.
1. decreased mileage
2. no valve knock (which is not considered to be a prolbem with my rig).

Spec_Ops2087

That pretty much sums it up


Basically, I feel that a water / meth injection would be easier and cheaper in the long run (not to mention nearly as efficient).

s2kswe

Informative answers. Thanks.