Interesting info on E85 and injector sizing
Rent me! per hour
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From: Still fixing others mistakes.
Well with my fuel map/injector control scaling for 60s my car it ran a touch lean on a tune dialed in to 11.7 - 11.8 afr in PE on premium.
I was seeing actual afr readings of 11.9-12.2 on E85.
So just installing the 80# injectors and running E85 will get you very very close.
I still don't know what the optimal E85 fuel readings (calculated to gasoline) are. In my actual E85 tune I am running 11.5 afr just to be safe.
I was seeing actual afr readings of 11.9-12.2 on E85.
So just installing the 80# injectors and running E85 will get you very very close.
I still don't know what the optimal E85 fuel readings (calculated to gasoline) are. In my actual E85 tune I am running 11.5 afr just to be safe.
I's love to use that in the car whenever I get around t putting it back together, but since I'm currently maxing out the 79's I would probably have to finally hook up the other 4 injectors I have in the car.
probably going to give it a try on the rx-7 since it's currently running an 850cc primary and 1600cc secondary injector and I went with a smaller gt3582r down from my 4088.
probably going to give it a try on the rx-7 since it's currently running an 850cc primary and 1600cc secondary injector and I went with a smaller gt3582r down from my 4088.
I live in the WI and there are E-85 stations all over the place.
I have 4 within 12 miles of my home.
The trick is the find the Renew 85 branded ones. They make their own fuel and have the cheapest prices. It is $1.79 now where other E-85 stations are $2.15-$2.25
I have 4 within 12 miles of my home.
The trick is the find the Renew 85 branded ones. They make their own fuel and have the cheapest prices. It is $1.79 now where other E-85 stations are $2.15-$2.25
sounds good for the track....run 93 when ur DD, when u go to the track go on empty tank, pick up some e85....swap injectors out and your set...if there were more e85 stations here i would so be on it...would love to run 105 oct on mine...but i believe there is only one station near me, and that will suck being limited to that one station
Rent me! per hour
Joined: 03-22-07
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From: Still fixing others mistakes.
I's love to use that in the car whenever I get around t putting it back together, but since I'm currently maxing out the 79's I would probably have to finally hook up the other 4 injectors I have in the car.
probably going to give it a try on the rx-7 since it's currently running an 850cc primary and 1600cc secondary injector and I went with a smaller gt3582r down from my 4088.
probably going to give it a try on the rx-7 since it's currently running an 850cc primary and 1600cc secondary injector and I went with a smaller gt3582r down from my 4088.
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Joined: 06-03-08
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From: Grand Rapids, MI
I's love to use that in the car whenever I get around t putting it back together, but since I'm currently maxing out the 79's I would probably have to finally hook up the other 4 injectors I have in the car.
probably going to give it a try on the rx-7 since it's currently running an 850cc primary and 1600cc secondary injector and I went with a smaller gt3582r down from my 4088.
probably going to give it a try on the rx-7 since it's currently running an 850cc primary and 1600cc secondary injector and I went with a smaller gt3582r down from my 4088.
If the pulse widths are the correct length for 60s and gas, they will be very close with 80s and E85. What you are saying is irrelevant.
Last edited by Matt M; Aug 8, 2009 at 09:48 PM. Reason: Automerged Doublepost
was going to add an inline pump, return line, and meth, but it's not looking good for the cobalt these days.
I was saying that if you had a setup, like a stage 2 kit or something and you were running 60# injectors as a lot of people are; then you could install 80# injectors and run E85. That would be the ONLY change and you'd be tuned correctly.
Nothing in the car needs to change other than fueling to run E85. Stock pump/lines, etc are just fine.
Downsides are losing 1/4 of your fuel economy and harder to find fuel. Benefits are no KR, safety, a corn smell, lower fuel costs in some area and 5% power gains.
Yes, you read that right. 5% power gain over 93 octane. So a typical stage 2 car in the 240-250 range is going to add 10-15WHP
Nothing in the car needs to change other than fueling to run E85. Stock pump/lines, etc are just fine.
Downsides are losing 1/4 of your fuel economy and harder to find fuel. Benefits are no KR, safety, a corn smell, lower fuel costs in some area and 5% power gains.
Yes, you read that right. 5% power gain over 93 octane. So a typical stage 2 car in the 240-250 range is going to add 10-15WHP
Rent me! per hour
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From: Still fixing others mistakes.
small incorrect guesses in the map scaling itself can cause issues. so a broad generalization of this level in assumption that people have the exact same 60lb map and can do this is way off base.
Former Vendor
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From: Grand Rapids, MI
i get blasted for the "group" saying false information. this in itself is wrong. getting the exact numbers for the 60lb injectors and working them into the hpt tables is far greater of a challenge than dumping a basic 60lb map and then putting in 80lb injectors for e85.
small incorrect guesses in the map scaling itself can cause issues. so a broad generalization of this level in assumption that people have the exact same 60lb map and can do this is way off base.
small incorrect guesses in the map scaling itself can cause issues. so a broad generalization of this level in assumption that people have the exact same 60lb map and can do this is way off base.
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From: Seneca, South Carolina
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From: Grand Rapids, MI
There seems to be some confusion on the boards as to how fueling systems work. An inline pump would add pressure capability but not volume. So you end up with flow close to the same generally. Increasing voltage to the stock pump would be a better, more effective solution.
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Joined: 07-16-08
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From: Boynton Beach, Fl
There seems to be some confusion on the boards as to how fueling systems work. An inline pump would add pressure capability but not volume. So you end up with flow close to the same generally. Increasing voltage to the stock pump would be a better, more effective solution.
i get blasted for the "group" saying false information. this in itself is wrong. getting the exact numbers for the 60lb injectors and working them into the hpt tables is far greater of a challenge than dumping a basic 60lb map and then putting in 80lb injectors for e85.
small incorrect guesses in the map scaling itself can cause issues. so a broad generalization of this level in assumption that people have the exact same 60lb map and can do this is way off base.
small incorrect guesses in the map scaling itself can cause issues. so a broad generalization of this level in assumption that people have the exact same 60lb map and can do this is way off base.
Last edited by 06blackg85ss; Aug 10, 2009 at 10:44 AM. Reason: Automerged Doublepost
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From: Boynton Beach, Fl
Man....
Your car was the one that really got me excited about the cobalt and what i can do... I saw it, and said "holy **** thats what i want"... I loved looking at it.. it gave me tons of encouragement to learn how to beef up the lsj and its given me one of my favorite new hobbies...
Id miss your cobalt..
Your car was the one that really got me excited about the cobalt and what i can do... I saw it, and said "holy **** thats what i want"... I loved looking at it.. it gave me tons of encouragement to learn how to beef up the lsj and its given me one of my favorite new hobbies...
Id miss your cobalt..
I miss it too, especially after driving mike 09 gt3076 and the tvs car I did yesterday. but the thought of a 500+whp rx-7 I have coming together this week helps soften the blow. I really don't even want to look at the cobalt for a while. going to finish dropping the motor pushing it to the back of my garage, putting a car cover on it, and letting it sit for a bit. don't get me wrong, it was one of the most fun/unassuming cars I've had and I loved every second I had it out on the street (minus sitting in manhattan traffic lol). hopefully I can get the money together to rebuild it even beastlier than before (sleeved, 6262 precision turbo, new fuel system and go for 600+whp).
I do have a fully built 93 rx-7 to play with lol. brand spanking new built motor, twin fuel pumps, twin feeds, regulators, 850cc primary's 1600cc secondary;s standalone, custom fmic, greddy compression ell, koyo 53mm dual pass radiator, tranny bracing, rear bracing, 4:10 gears, 3.5" exhaust, the list goes on. 68,xxx miles, car is mint (well once I finish repainting it). interior doesn't have a flaw anywhere and it weighs in @2475 lb;s lol.
I have an ls6 going into it next summer. Cobalt bandwagon? I was the cobalt bandwagon. I love the car, I'm just out of money at the moment, need at least $2500 to get it back together which I don't have at the moment, I had just dropped @2600 for the rx-7 a week before the cobalt took a ****.
oh and I was a rotary guy loooong before the cobalt was even a dream. Been running them since the mid 90's so I know the deal.
oh and I was a rotary guy loooong before the cobalt was even a dream. Been running them since the mid 90's so I know the deal.