Swapping to e85
08-30-2015, 05:20 PM
#1
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Swapping to e85 Hello guys/girls So im thinking about swapping to e85 but dont completely understand if you have to increase your nitrous jetting since e85 requires roughly 30% more fuel to feed the engine I currently have a 125 shot so would I have to increase this to a say a 150 shot as far as the jetting to be about a 125 shot or will it remain 125 shot? I have a 2007 grand prix gxp ls4 I no im in the wrong section just but my section is so small I didnt get any feedback thanks in advance
08-30-2015, 08:16 PM
#2
Don't touch the nitrous jetting unless you are looking to add HP. The fuel jetting will need to go up 30% but be careful as most pumps do NOT pump true E85. Around my area E60-E70 is what gets pumped out of an "E85" pump. Starting at a 20% bigger (by area) jet is usually a good bet when switching.
08-30-2015, 08:35 PM
#3
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Ok cool so ur saying leave the nitrous jetting as they sit now. Yea I have 2 e85 stations close to be one is right at 85 and the other is high 60s low 70s the price is like 20 cent more at the station with the good e85 tho. Im just being a lil cautious dont wanna mess anything up
08-31-2015, 06:30 PM
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to kinda tag along with the op. just found out that 2 station in my area r getting E85 and ive been wanting to run it. but how does it do with nitrous period. i run a stand alone and would it benifit me to run c85 in that and e in the main tank. i just worried about how e and nitrous work together. ive always ran leaded in the the standalone and 93 in the tank. on a 175 hit atm.
09-01-2015, 05:27 PM
#6
They work great together. Allows you to run more timing, and alot cheaper than race fuel. As long as you measure the consistency you can get a tune up on E85 really spot on and it definitely has its advantages over low octane pump gas.
-Garrett
-Garrett
09-01-2015, 07:21 PM
#7
Be careful when running more timing with E85. In a lean out condition the detonation can be worse than gas because the flame front speed picks up much faster than gas. Make sure your fuel supply is rock solid and injectors will not get clogged.
http://www.osti.gov/scitech/servlets/purl/611758 figures 6 & 7
http://e85vehicles.com/e85/index.php...soline-vs-e85/ bottom of the page
http://www.osti.gov/scitech/servlets/purl/611758 figures 6 & 7
http://e85vehicles.com/e85/index.php...soline-vs-e85/ bottom of the page
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09-02-2015, 09:54 AM
#8
Be careful when running more timing with E85. In a lean out condition the detonation can be worse than gas because the flame front speed picks up much faster than gas. Make sure your fuel supply is rock solid and injectors will not get clogged.
http://www.osti.gov/scitech/servlets/purl/611758 figures 6 & 7
http://e85vehicles.com/e85/index.php...soline-vs-e85/ bottom of the page
http://www.osti.gov/scitech/servlets/purl/611758 figures 6 & 7
http://e85vehicles.com/e85/index.php...soline-vs-e85/ bottom of the page
09-02-2015, 08:09 PM
#9
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what scares me ive only fooled with 93 , and what little leaded fuel in the standalone. but i think im gonna make the switch after this season is over. i got my car hitting hard and running good. so ill start over with new stuff next year but i know nothing about e85
09-03-2015, 05:51 PM
#12
Make sure you guys invest in a good E85 tester. Inconsistency from pump to pump is a major downfall of E85.
http://www.summitracing.com/parts/qft-36-e85
http://www.summitracing.com/parts/qft-36-e85
09-04-2015, 03:56 PM
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I am all for saving money. But E-85 can be a bit sketchy, as others have stated, since it is not always consistant. Now if E-95 was more readily available then that would be the ticket as you would have a lot better tuning window.
Unless you are data logging the car and run HP tuners (running the factory ECM) I would really stick with 93 and do a stand alone with C16.
The tune is everything. And you really got to keep up on the tune with E-85 and make adjustments accordingly. For most, this is not the path I would recommend. As pump availability is a big factor too. Now you midwest folks are fine for this, it's just other areas where it just makes no sense to run it as it will become a pain to find ethanol even more so if you take your ride on long tips.
Just some food for thought if you do decide to go that direction.
Unless you are data logging the car and run HP tuners (running the factory ECM) I would really stick with 93 and do a stand alone with C16.
The tune is everything. And you really got to keep up on the tune with E-85 and make adjustments accordingly. For most, this is not the path I would recommend. As pump availability is a big factor too. Now you midwest folks are fine for this, it's just other areas where it just makes no sense to run it as it will become a pain to find ethanol even more so if you take your ride on long tips.
Just some food for thought if you do decide to go that direction.
09-14-2015, 04:16 PM
#16
I am all for saving money. But E-85 can be a bit sketchy, as others have stated, since it is not always consistant. Now if E-95 was more readily available then that would be the ticket as you would have a lot better tuning window.
Unless you are data logging the car and run HP tuners (running the factory ECM) I would really stick with 93 and do a stand alone with C16.
The tune is everything. And you really got to keep up on the tune with E-85 and make adjustments accordingly. For most, this is not the path I would recommend. As pump availability is a big factor too. Now you midwest folks are fine for this, it's just other areas where it just makes no sense to run it as it will become a pain to find ethanol even more so if you take your ride on long tips.
Just some food for thought if you do decide to go that direction.
Unless you are data logging the car and run HP tuners (running the factory ECM) I would really stick with 93 and do a stand alone with C16.
The tune is everything. And you really got to keep up on the tune with E-85 and make adjustments accordingly. For most, this is not the path I would recommend. As pump availability is a big factor too. Now you midwest folks are fine for this, it's just other areas where it just makes no sense to run it as it will become a pain to find ethanol even more so if you take your ride on long tips.
Just some food for thought if you do decide to go that direction.
I agree and to add to that reading plugs on E85 are alot harder and differnt than race gas or 93.
09-14-2015, 05:36 PM
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Even if e85 is a bit sketchy will it matter much on a n/a car with a small shot of nitrous? What I mean is say you can run 26 degrees on 93 before knock, but the car makes power all the way to 32 with e85 and with no knock. Couldn't you run like say 30 degrees to compensate for these inconsistencies? This way you are still making more power than 93 can offer, while allowing a small buffer for the inconsistent possibilities
09-14-2015, 06:34 PM
#18
Even if e85 is a bit sketchy will it matter much on a n/a car with a small shot of nitrous? What I mean is say you can run 26 degrees on 93 before knock, but the car makes power all the way to 32 with e85 and with no knock. Couldn't you run like say 30 degrees to compensate for these inconsistencies? This way you are still making more power than 93 can offer, while allowing a small buffer for the inconsistent possibilities
Depending on your combo e85 may not give that big of gains over 93 NA anyways. When your ethanol percentage changes you have to change your a/f and timing, now add in nitrous your just asking for trouble.
I love e85 and we run it in alot of boosted vehicles and in a few nitrous vehicles, but there is alot more work than just throwing e85 in there and going if you are making some serious hp.
09-14-2015, 08:02 PM
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Thats what I like to call playing with fire. That method is what get most people in trouble IMO.
Depending on your combo e85 may not give that big of gains over 93 NA anyways. When your ethanol percentage changes you have to change your a/f and timing, now add in nitrous your just asking for trouble.
I love e85 and we run it in alot of boosted vehicles and in a few nitrous vehicles, but there is alot more work than just throwing e85 in there and going if you are making some serious hp.
Depending on your combo e85 may not give that big of gains over 93 NA anyways. When your ethanol percentage changes you have to change your a/f and timing, now add in nitrous your just asking for trouble.
I love e85 and we run it in alot of boosted vehicles and in a few nitrous vehicles, but there is alot more work than just throwing e85 in there and going if you are making some serious hp.
