Starting E-85 conversion...
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From: Spokane, Wa
Starting E-85 conversion... Just bought a set of 60# injectors on here to start my e85 conversion. I had my heads milled... and it turns out i got mixed up on the JE piston p/n i am running. Turn out my compression now is roughly 13.5:1, so i'm done trying to limp it on 91 on the street, and buying c12 is too expensive so E-85 is the answer. Will still be tuning in open loop, speed density, so I pretty much have to start from scratch on the tune, and it will take me quite a few days on the street to get the cruising/midrange AFR correct. Going to be working in lambda, hopefully my local dyno guy can read lambda on his dyno. I've heard 1.0 is where i need my idle and cruise, and .83 at WOT for a starting point. Expect dyno results in about 2 weeks 
Also, just ordered a xs starter from powermaster, these autozone starters were dying almost twice a month trying to crank this thing
Also, just ordered a xs starter from powermaster, these autozone starters were dying almost twice a month trying to crank this thing
Cool, I'm curious to see how this turns out. I've seen alot of good results from E-85 lately, especially from local guys. Most are FI builds though.
Do you have any current dyno #s so we can see the before and after? And what are you using for a fuel pump?
Do you have any current dyno #s so we can see the before and after? And what are you using for a fuel pump?
Awesome you wont regret going E85. I have converted many DSM's and Evo's to E85 with great results able to run more timing/boost with out knock. What is the price per gallon where you live? The common mistake people make is mixing E85 with gas tuning it for that tank then when they fill up again put different amounts of each fuel in which will cause the tune to be off which usually results in blown motor or headgasket.
Cant wait to see what you gain with this. Also have you messed around with nitrous jetting for E85 or are you adding fuel through the injectors?
Cant wait to see what you gain with this. Also have you messed around with nitrous jetting for E85 or are you adding fuel through the injectors?
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From: Spokane, Wa
car put down 480/459 on 100 octane unleaded with conservative timing, i thought it was about 12.5 compression back then, actually was about 13.1 due to me being an idiot and thinking i had smaller domes than i do. Thinking about doing a cam swap at the same time (gonna fudge the numbers though), because the current cam was for a single plane and heavy nitrous use, and I'm stickin with the lt4 manifold for awhile to stay in the extreme street classes at the shootout. I'm going to have to redo the tune anyways, so might as well pick up some power Haven't played with the nitrous yet, its going to be interesting tuning it because i will be using c16 in the standalone, so my a/f numbers will be out of whack. Not sure how plug reading will go with that either 
Haven't played with the nitrous yet, its going to be interesting tuning it because i will be using c16 in the standalone, so my a/f numbers will be out of whack. Not sure how plug reading will go with that either I don't recommend mixing E85 and C16. Better check the nitrous forum of YellowBullet and see if anyone has done that yet. I know the a/f needs to be what 10:1 or so on E85. If the C-16 sees that rich it can lift ring lands. Not sure if you split the target a/f or not on mixing both.
Keep me posted on what you find out.
Keep me posted on what you find out.
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doesn't it take 2 to 1 on the amount of e85 compared to old 93? asking because i don't even have any e85 around my area to even toy with the idea. so i have not bothered with looking at the conversion.
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Verdad Gallardo Its roughly 20-30% more fuel required for the same energy as gas. It really depends on the application brake fuel consumption differs from N/A to F/I.
Also if you live in cold climate areas during winter time you have to be careful some gas station mix more gas in the mix due to it being harder to start in cold weather.
I dont have much experience with E85 in nitrous applications except what I used on my car just a small shot. But on cars running high boost with E85 we had great success with running E100 in alcohol injection cell.
I dont have much experience with E85 in nitrous applications except what I used on my car just a small shot. But on cars running high boost with E85 we had great success with running E100 in alcohol injection cell.
I got a high tq CV starter I will sell ya if you want to cancel the order on the other one.
BTW if I wanted to do that swap to e85 do you need low or high impedance injectors?
BTW if I wanted to do that swap to e85 do you need low or high impedance injectors?
Last edited by FASTFATBOY; Feb 12, 2010 at 02:40 PM.
i would run low with a driver. quicker response time on open and close events. i run 56's on my setup which is over kill but they work great with the driver and are big enough for future plans.
Beat me to it!
Last edited by derekderek; Feb 12, 2010 at 06:54 PM. Reason: double post
I had tuned my car for E85 a while ago. First, since an O2 just reads lambda, then it is converted to an 'A/F' ratio based on the fuel the display is setup for. If using a wideband (such as your tuner's) that displays gasoline A/F, lambda on E85 will display 14.7 even though the actual ratio is 9.8. So if using a wideband displaying a gas A/F ratio for tuning, tune for 11.8-12.1 WOT A/F and that would be a .8-.83 lambda.
Also, as others have said, winter blend in most areas is more like E70, then E85 in warmer months. So you'll have to measure the ratio of fuel (there are things available to measure this) or get a chart for your area that shows the times of year the mixes change. That way you can adjust your tune accordingly.
Also, as others have said, winter blend in most areas is more like E70, then E85 in warmer months. So you'll have to measure the ratio of fuel (there are things available to measure this) or get a chart for your area that shows the times of year the mixes change. That way you can adjust your tune accordingly.
I had tuned my car for E85 a while ago. First, since an O2 just reads lambda, then it is converted to an 'A/F' ratio based on the fuel the display is setup for. If using a wideband (such as your tuner's) that displays gasoline A/F, lambda on E85 will display 14.7 even though the actual ratio is 9.8. So if using a wideband displaying a gas A/F ratio for tuning, tune for 11.8-12.1 WOT A/F and that would be a .8-.83 lambda.
Also, as others have said, winter blend in most areas is more like E70, then E85 in warmer months. So you'll have to measure the ratio of fuel (there are things available to measure this) or get a chart for your area that shows the times of year the mixes change. That way you can adjust your tune accordingly.
Also, as others have said, winter blend in most areas is more like E70, then E85 in warmer months. So you'll have to measure the ratio of fuel (there are things available to measure this) or get a chart for your area that shows the times of year the mixes change. That way you can adjust your tune accordingly.
Also if you live in cold climate areas during winter time you have to be careful some gas station mix more gas in the mix due to it being harder to start in cold weather.
I dont have much experience with E85 in nitrous applications except what I used on my car just a small shot. But on cars running high boost with E85 we had great success with running E100 in alcohol injection cell.
I dont have much experience with E85 in nitrous applications except what I used on my car just a small shot. But on cars running high boost with E85 we had great success with running E100 in alcohol injection cell.
I had tuned my car for E85 a while ago. First, since an O2 just reads lambda, then it is converted to an 'A/F' ratio based on the fuel the display is setup for. If using a wideband (such as your tuner's) that displays gasoline A/F, lambda on E85 will display 14.7 even though the actual ratio is 9.8. So if using a wideband displaying a gas A/F ratio for tuning, tune for 11.8-12.1 WOT A/F and that would be a .8-.83 lambda.
Also, as others have said, winter blend in most areas is more like E70, then E85 in warmer months. So you'll have to measure the ratio of fuel (there are things available to measure this) or get a chart for your area that shows the times of year the mixes change. That way you can adjust your tune accordingly.
Also, as others have said, winter blend in most areas is more like E70, then E85 in warmer months. So you'll have to measure the ratio of fuel (there are things available to measure this) or get a chart for your area that shows the times of year the mixes change. That way you can adjust your tune accordingly.