Does anybody know anything about running e85 through cobalt ss'? Any modification have to be done, any info or opinions are appreciated. thanks

 

80lbs injectors and a tune

 

yeah the stock injectors won't handle it. 60's wont even handle it. Go 80's, 2.5" sc pulley, get tuned, slap some cooling mods on and go fast

 

lets not go crazy with the pulley.. lol just saying.

80's
tune
2.8'' - 2.6''
header/dp combo - where boost goes in....gotta have a way out
cooling mods.

honestly i wouldnt mess with it unless you own a hptuner and can do it yourself.

 

Right there.

At a bare minimum 80's and a tune, but what he said is ideal

 

E85 is good stuff.

 

agreed and also make sure that they sell e85 close to you and where u commute because u dont wanna run outta fuel because they dont sell e85 somewhere

 

You can run 60's on a 2.8 and larger pulley sizes. Just tuned an ION RL for 2.8/60's/E85. IDC's are 89%

 

i did as well while i was waiting on my 80's to come in. worked fine. once again.. a tuner is a must with e85

 

No, a tuner is REQUIRED for E85 lol

 

I like the E85.

Its AutoX legal btw.

 

So I'm running 2.7 pulley, 60s, full exhaust, and meth. How much more power can I make with e85? Don't really know that much about it... will it even give me more hp? Also have zzp s3 h/e

 

With that setup, it depends.

Whats your maximum Injector duty cycle or max pulsewidth with your current tune?

 

You will need 80# injectors to do so. I dropped a few tenths off my 60-100 time going from your setup to E85

 

There's too many variables to just say you'll gain X_hp going from meth to E85. You might lose some.

E85 usually has an effective octane rating between 94 and 100. I've seen data suggesting that meth injection (in proper proportion, with proper mixing) can yield a combustion event with as high as 130 effective octane rating when 93 octane pump gas is used.

which means more possible spark advance (higher hp/tq curve across the board) and moar boost!

 

True^ but it takes a large meth nozzle with 100% meth to come close to the Octane of E85, and it still burns at a much higher BTU than E85. With E85 you can push the timing as far as you want, although after a certain amount it just wastes rod bearings, but with that high meth mixture you should be able to reach that timing as well.

So basically meth is a good alternative for people who cant or dont want to run E, but you generally will be more reliable and make a little more power on E

 

There exists a peak torque spark advance at any given rpm. It is calculated using fractal modeling of the spark induced flame front. It equals the degrees before top dead center that yields a flame front that hits the piston at top dead center. This is what the head GM engine calibration engineer taught me in the classes I took at SAE headquarters. Beyond that advance, you are actually trying to spin the motor backwards, robbing you of power and as you said destroying conrods and such.

I've had better luck w/ meth than E85. The most powerful car I've ever tuned was on meth. It was a Evo with a 2.3L stroker kit, 1000cc injectors on 93pump gas and a GT3582R. It put down 750awhp and got 38mpg combined if you stayed off the boost.

I encountered no knock while tuning the car at all. I actually passed that peak torque spark advance and had to retard it a little bit (as judged by dyno results, I'm not going to do a fractal flame front analysis of yoru combustion events for a $150 tune).

I run E85 opposed to meth because its AutoX legal and less worrysome than meth. not because I can get higher numbers.

 

Those are impressive number on that Evo. I set up a base map on my friends 2.3 stroker evo with 1600's and a precision 6262 for 15 psi on e85 speed density tuned. Converting it with a tephra v4 patch was kind of annoying since it took some time and I didnt charge him, but thats besides the point. He went to the dyno and laid down 398whp on 15psi and started turning up the boost and found out the hard way that his oil feed line wasnt big enough.

Anyways Ill agree with you on the fact that meth is a great way to make power and cool, but i also like E85 because its fool proof. You put it in the tank and go

 

Eh so e 85 seems like it not worth it.. gonna stay with my 93 octane..

 

agree agree agree. its fool proof.

The Evo I tuned had a AEM EMS. didn't have to mess around with the stock BS.

MY E85 Evo is stock ECU though, with those bigass injectors, but theres another thread to talk about that in.

I kinda started that thread to introduce those injectors to the Cobalt community. To my knowledge no one has used them yet, and someone will have to sort the issues out they represent with most stock ECUs.

 

Over 93 its WAY worth it. Over 93 + meth its neglible but in my personal preference I like E85 more. Seems like the LSJ loves E

Dirty, Ill jump on over to your other thread

 

If people havent figured out that e85 is worth while they shouldnt have the opportunity to use it.

 

How can methanol and 93 have a higher octane than the highest rated octane of the two fuels?....

 

Look at what this car made with minimal mods on E85. Just over $1k in mods.

YouTube - Cobalt SS/SC 291whp @ West Bend Dyno

YouTube - Tyler Cobalt SS/sc 291whp @ West Bend Dyno days.

 

because of the charge cooling that takes place when the methanol evaporates.

Its like air conditioning for your intake. The methanol undergoes a phase change and absorbs a lot of energy & entropy. basically organizes and stabilizes the intake charge.