The e85 thread
Le Mans Master
Joined: Oct 2005
Posts: 7,086
Likes: 1,829
From: Metro Detroit Michigan
Is there an engineer here who could take the latent heat of vaporization value of E-85 versus gasoline, and calculate how much additional power and boost could be generated with E-85 while maintaining approximately the same combustion temperatures?
That info could be useful for us stock shortblock guys, assuming that butting of the ring end gaps from heat, or inadequate heat transfer from a thin top ring land are the major issues.
That info could be useful for us stock shortblock guys, assuming that butting of the ring end gaps from heat, or inadequate heat transfer from a thin top ring land are the major issues.
Safety Car
Joined: Oct 2001
Posts: 4,945
Likes: 0
From: Dallas/Valley Ranch TEXAS!!!
I have been running E85 for a year and a half a best of 1070 rwhp on raceday tune... One thing I really REALLY LOVE... No more gasoline Smell!!! Only down side is I'm finally out of fuel pump, even though I run the 2500hp Magnafuel pump... E85 takes a ton of fuel system to make big power, we're adding a secondary eliminator intake pump to supplement the big external. E85 is one of the best choices I have made with my current setup...
Racer
Joined: May 2004
Posts: 388
Likes: 1
From: Louisville Ky
Bone stock bottom end with 147,000 miles, 678 Dynojet whp. (see sig for more details)...yep, E85 is awesome.
Fuel system consist of twin Walbros, F-body filter, stock fuel-rails modified for return line, regulator, and 1000cc injectors.
Fuel system consist of twin Walbros, F-body filter, stock fuel-rails modified for return line, regulator, and 1000cc injectors.
Le Mans Master
Joined: Oct 2005
Posts: 7,086
Likes: 1,829
From: Metro Detroit Michigan
Which Walbros?
Thread Starter
Drifting
Joined: Jul 2007
Posts: 1,533
Likes: 1
I have been running E85 for a year and a half a best of 1070 rwhp on raceday tune... One thing I really REALLY LOVE... No more gasoline Smell!!! Only down side is I'm finally out of fuel pump, even though I run the 2500hp Magnafuel pump... E85 takes a ton of fuel system to make big power, we're adding a secondary eliminator intake pump to supplement the big external. E85 is one of the best choices I have made with my current setup...
Racer
Joined: May 2004
Posts: 388
Likes: 1
From: Louisville Ky
Burning Brakes
Joined: Nov 2007
Posts: 882
Likes: 2
From: Miami Florida
Thread Starter
Drifting
Joined: Jul 2007
Posts: 1,533
Likes: 1
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Drifting
Joined: Sep 2008
Posts: 1,389
Likes: 3
From: somewhere shooting my assault rifles
I'm still on the fence whether or not E85 will harm "stock" in tank C5Z/C6Z fuel pumps in the long run. Most people that run E85 have swapped out their stock in tank fuel pumps so there really isnt any long term data out there for a stock pump and E85 affects on it.
Last edited by Z06supercharged; Nov 30, 2011 at 04:22 PM.
Racer
Joined: May 2004
Posts: 388
Likes: 1
From: Louisville Ky
There is hardly any difference in stock pumps and aftermarket pumps, the only reason they're switched is for more volume. Must of the pumps people are switching to are OEM pumps for some other factory application. The Walbro 255s I've put in several cars look identical to the factory pumps that were replaced. In fact, the original pumps in every C4/C5/C6 I've worked on were made by Walbro. E85 won't hurt anything in your stock fuel system, period.
Thread Starter
Drifting
Joined: Jul 2007
Posts: 1,533
Likes: 1
There is hardly any difference in stock pumps and aftermarket pumps, the only reason they're switched is for more volume. Must of the pumps people are switching to are OEM pumps for some other factory application. The Walbro 255s I've put in several cars look identical to the factory pumps that were replaced. In fact, the original pumps in every C4/C5/C6 I've worked on were made by Walbro. E85 won't hurt anything in your stock fuel system, period.
it is no more corrosive than gasoline.
Drifting
Joined: Sep 2008
Posts: 1,389
Likes: 3
From: somewhere shooting my assault rifles
I just tested my local station here in N California and E85 was actually E87 and E88 on second test. Apparently they are smart and dont go anywhere close to the min level 74% winter blend here as the more ethanol the more profits they make. This E88 though can make really cold morning starts troublesome till it warms up good but can tune around that.
Some guy was standing there watching me and said it sucks the pump 91 is 15% ethanol and I said no it isnt. Its about 7-8%. I tested it for him and it was 8% as it always is around here winter or summer. Ive never seen a Chevron station here thats been 10%.
I'm putting together a flex fuel sensor w/digital readout for my tank so I always know whats going in it. Gas companies % on ethanol can be a damn 15% spread on the E85 and ive seen 5% spread on pump 91.
Some guy was standing there watching me and said it sucks the pump 91 is 15% ethanol and I said no it isnt. Its about 7-8%. I tested it for him and it was 8% as it always is around here winter or summer. Ive never seen a Chevron station here thats been 10%.
I'm putting together a flex fuel sensor w/digital readout for my tank so I always know whats going in it. Gas companies % on ethanol can be a damn 15% spread on the E85 and ive seen 5% spread on pump 91.
Last edited by Z06supercharged; Dec 17, 2011 at 12:17 AM.
Instructor
Joined: May 2003
Posts: 104
Likes: 0
From: Houston TX
I just tested my local station here in N California and E85 was actually E87 and E88 on second test. Apparently they are smart and dont go anywhere close to the min level 74% winter blend here as the more ethanol the more profits they make. This high of E85 % though can make really cold morning starts troublesome till it warms up good.
Some guy was standing there watching me and said it sucks the pump 91 is 15% ethanol and I said no it isnt. Its about 7-8%. I tested it for him and it was 8% as it always is around here winter or summer. Ive never seen a Chevron station here thats been 10%.
I'm putting together a flex fuel sensor w/digital readout for my tank so I always know whats going in it. Gas companies % on ethanol can be a damn 15% spread on the E85 and ive seen 5% spread on pump 91.
Some guy was standing there watching me and said it sucks the pump 91 is 15% ethanol and I said no it isnt. Its about 7-8%. I tested it for him and it was 8% as it always is around here winter or summer. Ive never seen a Chevron station here thats been 10%.
I'm putting together a flex fuel sensor w/digital readout for my tank so I always know whats going in it. Gas companies % on ethanol can be a damn 15% spread on the E85 and ive seen 5% spread on pump 91.
Drifting
Joined: Sep 2008
Posts: 1,389
Likes: 3
From: somewhere shooting my assault rifles
I'm not doing a setup that changes tune automatically to Ethanol % but just a sensor to give me a digital display what the % is. Changing my tune takes me 30 seconds and is no big deal if needed if % is way off. So far it isnt ever enough % variance to worry about it..
Last edited by Z06supercharged; Dec 16, 2011 at 08:47 PM.
Instructor
Joined: May 2003
Posts: 104
Likes: 0
From: Houston TX
Also have to wonder if the pre 04 computers can adjust for it. Might even be worth swapping it out if it means being able to run 93 oct in a jam...
Drifting
Joined: Jul 2011
Posts: 1,250
Likes: 0
From: paducah ky
My DD is 00 c5 LPE TT 600rwhp, 30kmi, ls6 stock rebuilt shortblock except cam and I think opened up ring gap, looking into that. My plan was for Alky-Ctrl meth inj and dyno tune probably using Bob Raymer. Who in Lou. area tunes upgrades for E85< Thanks
Racer
Joined: May 2004
Posts: 388
Likes: 1
From: Louisville Ky
My car has been boosted for about 35,000 miles, only been on E85 for about 5,000. And I have no idea what the fuel expenses are. All I know is I gained an honest 75whp by changing from pump and meth to E85. I built my fuel system and probably have about $1,000 in it. I'm guessing you could have one like it installed for 1,500-2,000 maybe. My tuner has a down and dirty system he came up with, that's much much cheaper, that uses an inline pump on stock lines. But I'm not sure if it would be enough for your power level.
Anthony Peck at Fast Track Performance tunes my car. He has several 1,000+whp cars on E85 and seems to have a pretty good handle on it. He's not done a flex fuel car yet, but I know he'd like to.
Anthony Peck at Fast Track Performance tunes my car. He has several 1,000+whp cars on E85 and seems to have a pretty good handle on it. He's not done a flex fuel car yet, but I know he'd like to.
Last edited by B Neat; Dec 18, 2011 at 01:06 AM.
Le Mans Master
Joined: Jul 2010
Posts: 6,004
Likes: 723
??
Is it possible to mix in a gal or two of E85 at fill up with pump gas 93 oct just for safety if running high boost without meth. My car is running 18psi of boost on 93oct no meth so if i add E85 at fill up without any tuning changes will this give me any more protection when in high boost compared to adding a can of torco??????