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Another e85 question

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Old 12-07-2017, 12:35 PM   #1
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Default Another e85 question

So I've been hanging out here alot and over on the bullet as well, trying to scrounge up as much solid info as I can on using corn with spray. I'm from Iowa and that means I can't get away from e85 even if I try. There is always somewhere I can get e85. With that being said, I would love to run it all the time in my car.

Its a very budget built foxbody with a 5.3
LS1 cam/LS6 springs
Stock Heads
Thinner head gaskets bump comp. to 9.8:1
Stock ls3 exhaust manifolds
Stock truck intake.
36lb injectors tuned on HP tuners by myself
I want to throw 150 or 175 at it, pulling from the rail.

Alot of the threads I find with the search date back to 2010 or older and usually end up being a pissing match between e85 and race gas, or how you need race gas in a standalone, etc etc. And alot of the threads speak of how little research is out there. Well, its been 7 years and I'm hoping there is someone out there that can share some info and their best results.

I'm wanting to know what you guys have found as safe AFR and also best power AFR

How much timing do you usually pull on the hit. I've read some guys recommend pulling the same as on pumpgas...some recommend just making it ruch with a cold plug and not yanking any timing out. Others say to use a hot plug and a rich tuneup and pull a small amount of timing.

I know each setup is different and will like different things, but I'm hoping a bunch of guys will share their personal experience and I can use that knowledge to keep my **** from melting down. I will be reading plugs!!
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Old 12-07-2017, 01:43 PM   #2
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You don't HAVE to run a stand alone. I think for what you're looking to do, E85 will be fine. As always, be sure to test it out of the pump. My main question is what fuel pump are you using? Make sure you've got enough pump to support the amount of power you're looking to run with the bottle on. For fueling, if it is one of our systems, we can give you recommendations as to what jets to run on the fuel side. As far as timing, always pull timing on your initial runs. Reading the spark plugs will tell you where to go from there. I always run the same heat range plug as you would with gas. Let me know if you have any other questions.
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Old 12-07-2017, 04:41 PM   #3
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Has an aeromotive 340 pump. Should be plenty I would think.

What lambda value do you usually shoot for to start? .75 and lean it out from there?
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Old 12-08-2017, 11:21 AM   #4
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I don't see anything wrong with starting around .75 and reading plugs from there. That should give you a safe, rich starting point.
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Old 12-09-2017, 12:02 PM   #5
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Default Fuel Flow ???

Hi, your 36 .lbs injectors could be too small with 400HP 100% duty cycle. (E-85)
I am not sure with your "pull from rail" comment ?

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Old 12-09-2017, 01:12 PM   #6
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At 100% duty cycle the injectors should handle 400 tire, on their own. But I'm not using them for the nitrous fueling so that doesn't really matter as they will be only supporting about 280 NA horsepower. I will be using a wet kit and getting the fuel for the wet kit right off the fuel rail hence "pulling from the rail" and the 340 pump should be more than enough to supply the motor and lots more spray then I'll ever shove through this thing.

I know for a fact the injectors will be fine in this setup and I might even use them for a 50 shot dry "oh **** he's out on me half a car" and they will handle that fine too.

I'm mainly looking for info on the nitrous AFR and a place to start with timing.
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Old 12-09-2017, 02:06 PM   #7
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Me too. I am currently upgrading my fuel system for corn. Just trying to get away from the 11$ a gallon race gas.
Keep us posted what you find out. I am 450 or so n/a to start than running 200 dry on top. Not really sure where to start afr wise.
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Old 12-09-2017, 03:03 PM   #8
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I'll share whatever I learn come April (around when my local track re-opens)

If you find out something first let us know haha. Peeking at jetting charts, it seems like at 55psi it's only one or maybe 2 jet sizes up on fuel compared to gas (seems odd to me) so I'll probably start with a 50 and follow the jet chart, then slowly up the nitrous pill and see what the trend is between suggested gas jet and actual e85 jet.
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