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My thoughts on E85 GTP's



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.
 
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
 
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...
 
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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
 


FoSHO99 said:
I feel pretty confident in saying you could daily drive a 3.0" pulley on a cai, headers, injectors, running E85 summer blend with an average tune...
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I do, and I haven't had any problems yet :knock on wood:.

I seriously put my injectors in, adjusted my injector table and drove to the station on practically E. Ended up putting 15.5 gallons in and loaded the tune while the car filled up. It took about 20 seconds for the idle to settle back down and you could literally hear when the E85 started to go through the fuel rail. The drive home, it ran great, just like it's supposed to.

The only drawback is the station is 8 miles away, and the loss in fuel economy, BUT given the price difference in fuel and the fact I got my MPG's back up to 23 ish, I'm actually spending about $10 a week less in fuel now.
I seriously wish I'd have been able to do this long before, but not having a station within 25 miles pretty much deters a lot of people from giving it a whirl.
 
dropped 25% mileage? EGADS!!!

the RMS titanic rolls about 30 on the highway as it is that's a significant penalty. Only ONE E85 pump in town and it's no more than a 40c difference between it and regular gas.

But dropping to a ~3.2 to 3.0 pulley on headers wth other small supporting mods sounds mighty appealin too... :th_king-evil:
 
fubar569 said:
dropped 25% mileage? EGADS!!!

the RMS titanic rolls about 30 on the highway as it is that's a significant penalty. Only ONE E85 pump in town and it's no more than a 40c difference between it and regular gas.

But dropping to a ~3.2 to 3.0 pulley on headers wth other small supporting mods sounds mighty appealin too... :th_king-evil:
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Cars are a non-profitable hobby. The faster they are, they more they cost to keep running. Parts wear out faster and they start eating more and more gas.
One could say it's the worst hobby ever, because the only reward most get from it is self-satisfaction and a few compliments, but boy is it fun.

I'm thinking about converting to E85 next year.
 
SeanGTP said:
Cars are a non-profitable hobby. The faster they are, they more they cost to keep running. Parts wear out faster and they start eating more and more gas.
One could say it's the worst hobby ever, because the only reward most get from it is self-satisfaction and a few compliments, but boy is it fun.

I'm thinking about converting to E85 next year.
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LOL yea GF thinks Im insane for throwing money at the GTP. "Shes like its a grocery getter, not a racecar." Yet everytime I outrun another car shes like "they're so stupid, this car is supercharged" lol.
 


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.
 
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.
 


OrangeL67 said:
^ This. Call me crazy, but I thought that's what oil was for.
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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.
 
Things get hot quick without the lubrication from the fuel.
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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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