Duncan_GT

Is there any benefit to be had switching over to e85? I know its better for boosted applications, and I know the car will require a bigger fueling system, but from a power standpoint is there any benefit? Keep in mind I don't have stock displacement.

Thoughts?

mjr46

a lot of boosted applications run it for it's alcohol like properties, often times it allows more boost to be run safely or if you had a high compression application it'll act in comparison

http://www.raceone85.com/

Maxwelhse

Hey mjr... This post got me wondering about timing... Do you think it would be safe to bump the timing beyond recommended 93 octane limits on E85?

Duncan_GT

^^ that was my next question. Im only at 10.5 compression

mjr46

you can, but with e85 you need 30% more delivery rate of e85 vs gasoline so you better have an adequate fuel system as well as the proper size inj's

Duncan_GT

So it cost less, yet requires more fuel to burn. Always a trade off.

My buddy just switched his STI over to e85. I was looking at it and liked the idea of being somewhat "green", especially in racing. Plus it has the cooling properties. Big *** stroker sitting in traffic on a hot summer day, I would assume the motor could get quite hot even with an adequate cooling system (it's got a ford racing water pump, fwiw).

So would you need to increase fuel pressure by 30%? I calculated my injectors and bought 42lb's, so I wonder if this is enough to run e85

mjr46

not sure if 42's would be enough on a 351 stroker on e85, really only need to do such if you were at the limits of pump gas

Duncan_GT

So I shouldn't switch? That link you posted had a ton of info. Also looked at e85mustang or something like that. I've read it doesn't build carbon like gasoline does. If I were to switch, is it a matter of just upping the fuel pressure and retuning the fuel curve?

TrimDrip

I would think 42s would be too small. I don't know but, I would think so.

If it was close, I guess you could try raising the fuel pressure to get more volume. The pump will have to support it though, they do bypass at a certain psi.

rmodel65

it only costs less because its subsidized by the taxpayers...