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jbrown's Avatar
 
Join Date: Mar 2006
Location: highland mills NY
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questions about going E85

I now am EFI and love it.. My son has a 16 mustang an he is going E85 and says he has a sensor that reads how much E85 is blended with regular gas, so it changed the tune by the percentage of E85. Can this be done with our cars?
I dont want to have to run regular gas or E85 and flip a switch. I would like to just have my car tuned and not have to switch from E85 tune to regular gas tune.
Thanks John
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83 sc cab turbo widebody. 3.5 liter supertec motor, B&B headers, EFI electromotive TecGT, TurboKraft GT35R billet turbo, 964 cams, WM inj, Bell full bay intercooler, Short bell housing turbo 4 speed tranny, roll bar, hargett shifter,
Old 08-29-2018, 07:40 AM
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Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
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With MegaSquirt, you run a GM FlexFuel sensor. No need for a switch, you just enable the sensor in the settings. It reads the amount of ethanol in the fuel, and compensates the fuel map from there in proportion to the alcohol content.

I'll be doing that too sometime after I get mine running again.

Cheap race gas!
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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR P & C's, soon to be 993SS cams and GSXR 750 ITB's fed by 964 intake, Borg-Warner S366 turbo @ 1.4 bar, Treadstone full bay IC, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MegaSquirt 2 (v3.57 board) w/EDIS, Tramont wheels (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel
Old 08-29-2018, 07:45 AM
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I'm using the flex fuel sensor, changes timing and fuel map depending on the % of Ethanol. Makes it real easy to change out your fuel if your car is going into storage.
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75 930, 76 930, 83 SC EFI turbo

Last edited by lite75; 08-29-2018 at 08:51 AM..
Old 08-29-2018, 08:31 AM
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Also keep in mind, you will need to replace all the fuel lines and pumps with ones that are ethanol compatible. E85 is great, but very corrosive. I have the gm flex fuel sensor, but havent installed it yet because of this.
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'86 930 Guards Red - EFI MS3Pro, 80lb inj, 3.4, GT35R, Tial 46, Bosch 044, B&B Headers, 3.2 carrera manifold, Turbokraft Full bay IC
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Old 08-29-2018, 12:24 PM
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Electromotive lists the TecGT as being multi-fuel capable but I see nothing in their documentation regarding a flex fuel sensor. Might want to reach out to them and confirm.
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1976 911S Signature Edition - 3.2SSt (JE 98mm 9.5:1 pistons, 964 Cams, ARP Rod Bolts, Big Port SC Heads, 3.2 Carrera Manifold, ID725's, B&B Headers, TS HyperGate45 Gen V, TS RacePort, BW S360, AEM Infinity 506, E85)
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Old 08-29-2018, 03:32 PM
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Thanks for the info. I talked to Richard at Clewett engineering and my tec gt will work. I changed my fuel lines a couple of years ago. I will check to see if they are good for E85. Pumps are Bosch, I guess I will have to change those. Thanks John
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83 sc cab turbo widebody. 3.5 liter supertec motor, B&B headers, EFI electromotive TecGT, TurboKraft GT35R billet turbo, 964 cams, WM inj, Bell full bay intercooler, Short bell housing turbo 4 speed tranny, roll bar, hargett shifter,
Old 08-30-2018, 03:59 AM
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Chain fence eating turbo
 
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Bosch pumps are E85 compatible AFAIK.
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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR P & C's, soon to be 993SS cams and GSXR 750 ITB's fed by 964 intake, Borg-Warner S366 turbo @ 1.4 bar, Treadstone full bay IC, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MegaSquirt 2 (v3.57 board) w/EDIS, Tramont wheels (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel
Old 08-30-2018, 04:55 AM
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Donít forget about injectors. If you are already approaching 80-90 percent duty cycle on gas itís time to GO BIGGER
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88 930 3.4 ,Twin plugged billet Xtreme cylinder heads and denso COPs, Dougherty custom GT 2 evo cams,pauter rods,Garrett Gt40,ms3x Efi ,1100cc injectors,extrude honed 3.2 intake,TK billet fullbay I/C,MODE headers,KEP stage 2,E-85 706 rwhp
Old 08-30-2018, 04:12 PM
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Frank what injectors are you running?Btw i must have watched the vid of you roll racing that Lambo and Merc a hundred times.
Unreal and so fun to watch.

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Old 09-01-2018, 03:35 PM
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1100 cc fuel injector clinic. Funny thing about that event was the car has felt down on power for some time now. Still fast as hell but not stupid fast. Did a leak down and found # 5 was 40% # 4 20% wtf. Must be broken rings. Yanked heads and rings were fine.. took the heads up to bill at Xtreme and as he checked all my valves he started tossing valves in the trash. 6 bent exhaust and 3 lightly intakes.an 18 pack and some laughs with the crew there and I was on my way home with all new valves. She is back now as good as ever!, that evo would still get me, just nowhere near as bad
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88 930 3.4 ,Twin plugged billet Xtreme cylinder heads and denso COPs, Dougherty custom GT 2 evo cams,pauter rods,Garrett Gt40,ms3x Efi ,1100cc injectors,extrude honed 3.2 intake,TK billet fullbay I/C,MODE headers,KEP stage 2,E-85 706 rwhp
Old 09-01-2018, 05:10 PM
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Frank i absolutely love your car man and thats crazy about the bent valves and still making that kind of power.I am glad to here that she is back to normal.Its amazing that a thirty year old air-cooled car can beat some of newest iron from Germany.That evo though must have been sqeezing some juice hidden somewhere.Haha Great car frank.

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Old 09-01-2018, 06:44 PM
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Btw you had mention making 800 i bet then that evo would be nothing but a blurrrr in your rearview mirror.

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Old 09-01-2018, 06:47 PM
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