Drew04GTO

iTrader: (1)

A few years ago I was on a Formula SAE team that used a 250cc engine with a chemically intercooled engine. The car ran e85 normally and had an additional injector as far up stream as you could deal with it and not get puddling. The IAT's were logged on a 112 degree hot Texas day with track temps closer to 130 and it turns out the intake charge as it was going through the manifold was 20 some odd degrees and was forming ice on the intake manifold.

Now that I'm building a 8:1 370 for my car with a PT88 I'm stronly considering switching the car to e85 and running a dual intercooler setup. E85 and a W2A. I know the method of using alcohol injection isn't new but why use methanol or anything if I have 20 gal worth of e85 in the back of the car? Not to mention the fact that my new house is 3 blocks from the nearest station so its not like I have to go out of the way to get some. Anyone on here use ethanol instead of methanol injection? I know the ethanol isn't as corrosive and whatnot but what else am I going to be missing with this setup?

Comments or suggestions appreciated.

Firechikn

iTrader: (15)

I was thinking the same thing the other day, now that we have a station that sells it. Info would be nice.

Drew04GTO

iTrader: (1)

If no one posts up any real interesting info by later tonight I'll dig through my old chemistry book when I get home so I can determine delta H for a given ammount of fuel being completely turned into vapor. Firechikin have you data logged IAT's? I'm curious to see what they're like on larger turbo LS1's. You're from Houston right? What's the highest IAT you've seen in August?

*edit* Got to thinking about the injector duty cycle issue, I could make a pretty simple circuit controlled by a Hobbs pressure switch to turn the injectors on to spray E85. Use a transistor and some other junk to switch two injectors, one open at a time to split the load between both and keep the internal coils happy.

DanO

Here's a chart.. i didnt feel like calculating though

Drew04GTO

iTrader: (1)

Thanks Dan, my brain's fried right now from staying at work late and being up all night finishing up my 240/sr20det so I can sell it tomorrow, if I get a chance later I'll crunch numbers on Delta H for lb/min.

GNXClone

iTrader: (7)

I've been using denatured alcohol from Home Depot. Denatured alcohol is mostly Ethanol.

Good read here:

http://www.rbracing-rsr.com/waterinjection.html

Grr

iTrader: (2)

One thing you can do, which i am doing once the car comes out this spring. I plan on running a my regular fuel system on E85, with dual walbros and 65# injectors. When those start running out of headroom, im going to inject the rest of the E85 fuel with my regular progressive alky injection system. This way i dont have to go crazy with my already expensive fuel system and also keep idle tuning easy without the huge injectors.
I will tell you that when i was running E85 last year on only 8psi, i picked up 65hp with added timing and IAT temps were 135.
Gary

Edit: BTW, i ran regular E98 in my injection system for years. My brother worked at a ethanol plant, so i got it for free, 55gal at a time. With the V6 in my GN, IATs went from 210* to 18* when spraying. I was using this as 38% fuel as well, and was running 32psi with 26* timing. Thats 450whp or so on 6 36# injectors