Thread: My thoughts on E85 GTP's

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  1. #1 Re: My thoughts on E85 GTP's 
    GXP Level Member darkhorizon's Avatar
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    Quote Originally Posted by TheOtherNick View Post
    Run the tank empty, get a can of e-85, tune for your new injectors you are installing while the tank is empty, add 30% fuel for E-85, drive the car fill the rest of the way and start dialing in the tune. I do not recommend running around on un tuned injectors and e-85 at all that is horrible advice.
    I have told people many times they can run E85 without tuning...

    Get 42# injectors... put E85 in = run great on a BONE STOCK tune.... It really is a flawless method and very safe. As long as you are running at least 70% ethonol in the tank (which can be done without much issues even with 3 gallons of regular in the tank), you will be more than fine to start beating on it quite soon.
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  2. #2 Re: My thoughts on E85 GTP's 
    GXP Level Member JoRoW99's Avatar
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    I think most people would choose larger than 42# injectors.
    '01 GT - Top swapped. ported SC/Heads/TB, SD headers, open cone, HPTuners, 3.4 MPS, 60#'s, E85.______________________SMGPFC #99_______________________
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  3. #3 Re: My thoughts on E85 GTP's 
    GrandPrix Junkie SeanGTP's Avatar
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    Quote Originally Posted by JoRoW99 View Post
    I think most people would choose larger than 42# injectors.
    Safest I've heard is at least 60# and I'm sure you can go larger.
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  4. #4 Re: My thoughts on E85 GTP's 
    youtu.be/xhrBDcQq2DM FoSHO99's Avatar
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    Most go with injector sizes appropriate for their level of power. A stock GTP running E85 like he stated above would only need 42.5#ers. Anybody running above 65# and not hitting north of 500whp on E85 needs to take a look at their fuel system.
    2001 GTP PT61 Turbo, E85, Stock Motor
    2011 Chevy Cruze MT6 1.4L Turbo
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  5. #5 Re: My thoughts on E85 GTP's 
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    I already had e85 in my turbo camaro, and just switched my gtp over this week, and ive been tuning with ltft's since i didnt put my wideband in yet, and still have to install the 60# injectors i bought... but just crusing around i lost about 25%of my fuel economy but i still want to play with the timing to try and make it better

    also 93oct cost $4.20 per gallon, e85 is $2.99 per gallon
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  6. #6 Re: My thoughts on E85 GTP's 
    I AM PEWPIN! rynoman03's Avatar
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    So how big of injectors should a rocker/header'd car need? I'd love to do this conversion if it were feasible. I've always heard to get 65# or go home with the e85. The 42# injector comment makes a person think...
    Last edited by rynoman03; 07-11-2011 at 06:00 AM.
    1999 GTPHP Tuned, Ported SC/TB, 42#'s, SSAC's, ZZP Modded 1.9's/LS6 Springs/Manley's, TransGo Shift Kit, Poly Uppers, KYB GR2's/Springtech's. - 231k and traded it in. - Gone
    2000 GTP: XP, P&P'd Heads, N*\Lq4 MAF, GenV, 42#'s, PRJ Rails\FPR, Racetronix, TEP w/ 3.29 Gears, 300m, 7/8" chain, SSAC's. - Collecting dust in my garage.
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  7. #7 Re: My thoughts on E85 GTP's 
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    well stock is 36#injectors, so 42#injectors dont give much more headroom, so either way i would go with the 60's

    the ford 42# greentops are actually 49# injectors on 4bar fuel pressure also, but i would still go with the 60's especially if ur gonna run a 3.0 pulley atleast
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  8. #8 Re: My thoughts on E85 GTP's 
    GT Level Member torq455's Avatar
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    ROFL!! They won't tell ya, but they get an ego boost too.
    2002 GTP: K&N, 3.2 pulley, flipped mounts. ZZP SS headers, 180 stat, NGK TR6's, MSD wires, Reptile ported TB, ported S/C, ported LIM, Intense Stage II heads with larger Manley severe duty SS valves, Yella Terra 1.9 full roller rockers, LS6 springs, Racetronix fuel pump re-wire, Oil pressure "kit", JMB FWI. Mustang dynoed at 240 WHP, 272 WTQ.
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  9. #9 Re: My thoughts on E85 GTP's 
    GTP Level Member AjL227's Avatar
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    There is a Mobil station 3 miles away; along with several others within 7 miles, from my house distributing E85. ~$3.30/g over ~$4/g for 93.
    I've been running Mototron 80#/hr (800cc) on my '04 CompG for the last month around with ~1k miles. I changed the fuel filter, same time I did the injectors.
    I filled up 15 gallons of e85, for the first time on July 3rd. I'm using HPTuner and Scan Data Thingy to make adjustments and tweaks to the g/s vs hertz MAF airflow table, while logging my daily drives. I'm getting closer and closer to -5+ LTFT.

    I must say, I noticed the engine ran smoother on e85 right from the get go, even better once I re flashed at least 3 times aiming for 0 LTFT since then.

    E85 is a very beneficial route, whether its your daily driver or a race car. There are no disadvantages, as long as you have access to tuning software on a laptop with atleast 30+ min battery life.

    I usually get around 300 miles for a ~15 gallon fillup on 93, I got 250ish miles on 15 gallons of e85, and I went WOT on the 3.2" 0*KR @ 15* a few times more than usual. Using HPTuner, my Injector Flow Rate cells are set to 66.99 g/s across the board. I'm running a stock fuel pump on a returnless fuel system.
    '04 CompG "WS6"
    '00 2.5RS "GM6"
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  10. #10 Re: My thoughts on E85 GTP's 
    GrandPrix Junkie redlinepontiac's Avatar
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    i feel blessed theres a station right next to my work, and 2 miles from my house
    RayRay
    92 Turbo miata
    71 bagged lemans wagon
    02 lexus is300
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  11. #11 Re: My thoughts on E85 GTP's 
    GT Level Member RegalGS98s's Avatar
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    Closest station to me with E85 is 20 miles away and they're not open 24/7. Next closest is in PA or DE. And it costs $0.30 more than premium. So don't think I'll be converting anytime soon. For performance it sounds good though. Is there anyone who's run E85 for more than 100k miles? I ask because, gasoline acts as a lubricant besides just a fuel. I can see increased wear with only 15% of it.
    SMGPFC #0330 - 3.25, Intercooled, Custom Tune, 1.84rr, LS6 Springs, roller timing chain, SLP Headers, Borla Exhaust, built Trans, B&M Trans Cooler, home cut poly uppers, gapless rings, N* TB, Ported heads.
    Soontocome: CAM?, Custom modified M112, home poured Poly Engine and Trans mounts
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  12. #12 Re: My thoughts on E85 GTP's 
    GXP Level Member darkhorizon's Avatar
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    The lubrication will not be effecting things in the motor, it may effect your fuel system parts.
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  13. #13 Re: My thoughts on E85 GTP's 
    GTP Level Member OrangeL67's Avatar
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    ^ This. Call me crazy, but I thought that's what oil was for.

    VS cam build 13.01@107 316whp/ XP build #1 12.78@110 334whp/ XP build #2 12.56@113 347whp
    IS3 Cam build (Ready to put out some serious numbers)
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  14. #14 Re: My thoughts on E85 GTP's 
    GT Level Member RegalGS98s's Avatar
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    Quote Originally Posted by OrangeL67 View Post
    ^ This. Call me crazy, but I thought that's what oil was for.
    Fuel acts as a lubricant for the cylinder walls. Ever had a bad fuel injector? Things get hot quick without the lubrication from the fuel. They do sell upper cylinder lubricants that you can add to your fuel. I was using Lucas upper cylinder lubricant for a while when no one was buying premium to try and offset the loss in octane from fuel sitting.
    SMGPFC #0330 - 3.25, Intercooled, Custom Tune, 1.84rr, LS6 Springs, roller timing chain, SLP Headers, Borla Exhaust, built Trans, B&M Trans Cooler, home cut poly uppers, gapless rings, N* TB, Ported heads.
    Soontocome: CAM?, Custom modified M112, home poured Poly Engine and Trans mounts
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  15. #15 Re: My thoughts on E85 GTP's 
    GXP Level Member darkhorizon's Avatar
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    Things get hot quick without the lubrication from the fuel.
    Nah, you are getting hot from lean air fuel mixture. Oil splash accounts for 99% of all cylinder wall lubrication. The oil rings on a piston are designed to hold a specific amount of splashed oil and carry it up the cylinder wall.
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  16. #16 Re: My thoughts on E85 GTP's 
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    I feel blessed, not only is there an e85 station a block from work but there installing another one across the street AND they just added one at the closest station to my house...barely a mile away.

    For the "I'm scared of losing lubrication" crowd get on bitog and look up tcw3. Been using it for about 10k on 93 and w the e85. Seems to work well, no residue on the plugs thats for sure. There's a 50 page thread with a couple years of documented use. At $12 a gallon and taking about 3oz per average fillup it lasts a long, long time.

    I never told PRJ it was in the tank when he tuned and asked him if anything was out of the ordinary and he, nor his wideband could tell so its not going to affect your tune as long as you keep the correct ratio going.
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  17. #17 Re: My thoughts on E85 GTP's 
    GT Level Member shawnschuldt's Avatar
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    The info in here is great i decided im going corn fed in 2 weeks, i just gotta wait on injectors that im gunna buy with my next check. i've had no luck in finding any used 65#ers so whats the cheapest place to pick em up.
    --00 Red GTP--
    CAR:E85--3.25"--SSAC Headers--ported gen 3--1.9 Rockers--AL 104's--65# Injectors--Zez wet kit 55 shot--9" AEM Cone--HP Tuned by me--No Cat--AEM
    13.07@108mph
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  18. #18 Re: My thoughts on E85 GTP's 
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    Quote Originally Posted by shawnschuldt View Post
    The info in here is great i decided im going corn fed in 2 weeks, i just gotta wait on injectors that im gunna buy with my next check. i've had no luck in finding any used 65#ers so whats the cheapest place to pick em up.
    Siemens 60 LB Injectors - Over The Top Performance
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  19. #19 Re: My thoughts on E85 GTP's 
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    do want.
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  20. #20 Re: My thoughts on E85 GTP's 
    GT Level Member shawnschuldt's Avatar
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    anyone else heard of this place? is it legit? id be more than happy to save some money by getting them here
    --00 Red GTP--
    CAR:E85--3.25"--SSAC Headers--ported gen 3--1.9 Rockers--AL 104's--65# Injectors--Zez wet kit 55 shot--9" AEM Cone--HP Tuned by me--No Cat--AEM
    13.07@108mph
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