SO, as you may have seen from my last threads, I blew my 4th cyl on my motor.

2006 Chevrolet Cobalt SS/SC

So.... I'm buying a new motor and keeping the last one as it had forged internals ready to go(may part out, unsure thus far).

New motor has 8,000miles on it and it's an 05'.
A buddies professional shop is installing it for me for $300. Nice...

I'm planning on E85 with 80lb Mototron injectors on a 2.6 pulley.
1. These injectors work well?
- Mototron 80# Injectors #

2. I have Lucas 42's as is, does my harness swap over or do I need a new one?

3. What AFR is normal on gas, and normal on E85?

4. Any issues with such a low mile motor getting E85 on it with a 2.6.
I'm looking to do a mild E85 tune, push maybe 260whp, 280whp MAX.
I've been told on E85 cooling mods are pretty optional as it is forgiving with timing, but cooling mods don't hurt. I'm shelling out $2,500 to get all this done motor purchase and all, so I'm not ready to cool it just yet, but will it be ok as is. Current mods below.

Car's mods:
K & N CAI
Pacesetter Headers, High Flow Cat, and Magnaflow Muffler
AEM UEGO Wide-band
B & M Short Shift Kit
Step Colder Plugs(Brand New on the New Motor)
3.0 Pulley as is, 2.6 will be on the E85> Blower Recently Rebuilt

I appreciate the help, the forums have helped me a lot through these hard times of my blown motor.

Thanks,
Roger a.k.a. Bratboy90

 

You will need to get the new harness for the 80#'s

 

bam

 

Lol.. ^^ bam

 

I would still recomend a picking up a bigger H/e just to be safe

 

I'm going 2.8 on a phenolic spacer. This should keep iats good and keep the stock belt tight. With E85. Shooting to put down 290whp. Shouldn't be an issue.

 

Nope.. you should be fine man . Talk with nickateen about his setup. hes on a 2.9 and 60s and e85 and had a Redline st 6800 and made 280 whp

 

3, lambda is not depended too much on fuel type you still want to cruise at lambda 1 (which is 14.7 for gas or ~9.8 for e85) and all that other jazz. HOWEVER if you do no change your wideband to e85 mode it will display the gas afr readings, since the sensor determines lambda and converts that to the afr based off the fuel type you tell it.

Tune is hella important now. You will need more timing on every single cell of the spark map as e85 has a lower burn speed, if you do not increase timing in cruise your gas mileage will suck, if you do increase it you can potentially get better than with normal gas. Tuning spark, as always really should be done on a load varying dyno and maximize the torque produced without knock in ever single cell on the table.

 

What is a Redline st 6800? I'm guessing he had his fuel cut at 6,800rpms. Why so low, I was looking to do 7,000rpm. I'll ask him some questions.

 

He means its set at 6800.

Oh and were waiting till spring to do mods so the tune can perfect.

You SHOULD stay stock till spring

 

I have a good tuner who has done E85 before with great results. I will talk to him about making sure my cruise is good. I'm looking to lose minimally on hwy. Only issue is suppose is people are saying E85 has a tax increase coming. That would suck.

 

Then you switch to pump gas and get meth

 

what do you recommend having timing around for cruise? I'd like to get better mpg then the 22-23 I get pretty much no matter what lol I'm running 20-21* at peak timing on 11 psi with e85 (or e70 since it's winter blend) but i have a 2.4

 

Way to much of a pain in the A$$.

 

E85 sucks

 

Nothing like an uninformed troll. However, I did see in his garage it says he's looking into getting E-85. Confused? O.o

 

Who's your Tuner.

 

I met the guy twice now. He has a Grey TVS'd Ion Redline with a fully built motor.
NHanson told me to have him do mine, NHanson is a good friend on mine.
The guys name is Ryan.(We live in Minnesota)

His CSS is Ryze. I still gotta get funds before I start poking at him about the tune. Awaiting my new motor to get shipped, then I'll poke at him.

Any tips for me. It's scary letting someone mess with my baby's electronics's with a motor that has only 8k on it.

 

I am running 50* under cruise with E85. I could probably go higher but have not tried.

I picked up about 2mpg going from 38* to 50*.

 

O yes that old garage maybe I'll update it soon. And e85 still sucks.

Wait until after the winter to use it, it's not even worth it now.

 

Every car is going to be different. Some times its only a few degrees sometimes its a lot, depends on the combo chamber shape mostly.

 

Arn't 2.4 and 2.2's able to get amazing MPG on the E85 due to the VVT? Someone was saying they got like 32mpg cruising due to some changes in that? I'm clueless, just reading other stuff.

LSJ's have cams which kills some adjusting for us.

 

if i could get 28 mpg i'd be in heaven lol

i'm running like 40 at cruise I'll have to look more into it. I need to get my ass in gear and start working on my tune more but i can't really drive the damn thing in the winter

 

Just going from the summer E85 to winter E70 has improved my fuel economy by another 2-3mpg.

28-32mpg might be possible with the right blend of Ethanol. Anyone who says they are getting that on full E85 is full of it.

Extensive testing has prove there is a large diminishing return on hp, fuel economy, knock resistance on any ethanol blend > 50%.

https://www.cobaltss.net/forums/2-0l...tuners-232430/

Basically, they took and LNF and removed 3 of the cylinders. Then tested NA and different boost levels with different blends of ethanol to gasoline. They found that there is a big drop off in benefits past E50 blends.

And that is not the opinion of some in-bread backyard yockal. Its been scientifically proven in controlled lab experiments.

There is some debate in the Ethanol distribution community about the decision to distribute E85 vs a lower blend year round. The decision use 85% ethanol was based on the fact that is the largest % of ethanol blend that won't cause starting issue in flex fuel vehicles. It also allows the fuel to be sold at the lowest price possible considering that ethanol is much cheaper to produce then gasoline. But it also produces the worst gas mileage and American's are fixed on the measure Miles per gallon while ignoring the more important measure of cost per mile.

Many ethanol distributors would prefer an E70 (or lower) blend year round to bring back the balance in fuel economy.

My local ethanol distributor sells E10, E85 and E20. They claim that flex fuel vehicles that run E20 will not lose fuel economy vs E10. And since there is more ethanol in the fuel, they can price it a few cents cheaper per gallon. Its also 89 octane vs 87.

So the best option would be to run your own custom blend of ethanol that best suites your engine. On turbocharged applications, E50 provides the best balance of power and fuel economy. On supercharged applications, E60 would probably be better against KR, controlling cylinder temps and lowering EGTs.

 

yea I don't have a way to blend it easily so lookss like I'm stuck with running full lol and dealing with the 22-23 mpg .. i'd be happy if i could even get 26 mpg thats basically what I was getting supercharged on 13 psi and pump lol turboed I was getting 29-32 on pump. I know you're going to get less on e but if i could pull out a few more so I could get 300 miles / tank i'd be happy. right now I get like 240 so it sucks because I cant really make any distance trips