E85 just more than gas? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

1Slow6.2 · 06-24-2013, 07:58 PM

A friend of mine did this.. put two gallons in his old 92 Explorer to "clean it up a little"

The two gallons did not affect the engine's running at all. It idled and ran just as smooth as ever. Cold start was fine too.

how high a percentage I could run without any harm to the engine? If I tried this method?

Sent from my hip pocket.. While slapping 5th.. As you're reading my plate

Iam Broke · 06-24-2013, 08:44 PM

30% will shift the Long term fuel trims around 8%, any more than 15% LTFT's will pop a CEL for too high positive fuel trims. That'd be around 45% E or so if your trims are close to zero.

1:1 E85 and E10 93 is E47 and 99 octane. Requires around 16% more fueling though.

2:1 E10 93 and E85 is E35 and 97 octane, it'll need 10-11% more fuel. I wouldn't go more than that without a tune for it.

The LTFT's carry over to WOT as well but don't flog it right away until they adjust. Since E85 is 105 octane it'll raise your 93 to about 96 octane at 30% E. No more KR on a stock tune.

Here's a calculator.

http://www.intercepteft.com/calc.html

You really need the ability to log your fueling though.

K32 Camaro · 06-25-2013, 03:25 AM

I've heard that E85 can eat up the O-rings used in your fuel lines, which is why aftermarket pumps specify if they're for E85 or not. (No idea if this is true..)

axis · 06-25-2013, 03:33 AM

Quote:

Originally Posted by K32 Camaro

I've heard that E85 can eat up the O-rings used in your fuel lines, which is why aftermarket pumps specify if they're for E85 or not. (No idea if this is true..)

It is true. Many rubber compounds don't play well with high levels of ethanol, for a long period. Several places are moving to E15 which is causing problems for some folks.

Iam Broke · 06-25-2013, 04:50 AM

No issues in the Camaro fuel system. I have read that the SS & ZL1 pumps are E85 rated, they just scrapped the FlexFuel on us before production began.
Ran E85 in my WS6 for years, now Phat Bee is addicted. Proper mods required of course for correct fueling. E85 requires ~30% more fuel.

1Slow6.2 · 06-25-2013, 10:20 AM

Thanks for the input. It's not like I'm going to be dumping gallons and gallons of E85 into the tank. Just wondering since the highest grade fuel I can get here is 91 and it's diluted 10% ethanol already In it. I already don't get the best mileage with the 91 & 10% blend added. Just wanted to run like 2 or 3 gallons of E85 with the base 91. Just want to make sure I don't fry anything or erode fuel lines etc..

Sent from my hip pocket.. While slapping 5th.. As you're reading my plate

Iam Broke · 06-25-2013, 04:21 PM

No worries.

06-24-2013, 07:58 PM	#1
1Slow6.2 Drives: 2013 1LE camaro Join Date: Apr 2013 Location: NorCal/Abilene Posts: 383	E85 just more than gas? A friend of mine did this.. put two gallons in his old 92 Explorer to "clean it up a little" The two gallons did not affect the engine's running at all. It idled and ran just as smooth as ever. Cold start was fine too. how high a percentage I could run without any harm to the engine? If I tried this method? Sent from my hip pocket.. While slapping 5th.. As you're reading my plate

06-24-2013, 08:44 PM	#2
Iam Broke PHAT B33 Drives: 2012 TF3 Camaro 2SS/RS M6 Join Date: Jun 2012 Location: Dark of the Moon Posts: 1,460 View My Garage	30% will shift the Long term fuel trims around 8%, any more than 15% LTFT's will pop a CEL for too high positive fuel trims. That'd be around 45% E or so if your trims are close to zero. 1:1 E85 and E10 93 is E47 and 99 octane. Requires around 16% more fueling though. 2:1 E10 93 and E85 is E35 and 97 octane, it'll need 10-11% more fuel. I wouldn't go more than that without a tune for it. The LTFT's carry over to WOT as well but don't flog it right away until they adjust. Since E85 is 105 octane it'll raise your 93 to about 96 octane at 30% E. No more KR on a stock tune. Here's a calculator. http://www.intercepteft.com/calc.html You really need the ability to log your fueling though. __________________ Another 1 of 371 '12 T3 LS3 M6's built. Last edited by Iam Broke; 06-24-2013 at 08:57 PM.

06-25-2013, 04:50 AM	#5
Iam Broke PHAT B33 Drives: 2012 TF3 Camaro 2SS/RS M6 Join Date: Jun 2012 Location: Dark of the Moon Posts: 1,460 View My Garage	No issues in the Camaro fuel system. I have read that the SS & ZL1 pumps are E85 rated, they just scrapped the FlexFuel on us before production began. Ran E85 in my WS6 for years, now Phat Bee is addicted. Proper mods required of course for correct fueling. E85 requires ~30% more fuel. __________________ Another 1 of 371 '12 T3 LS3 M6's built.

06-25-2013, 04:21 PM	#7
Iam Broke PHAT B33 Drives: 2012 TF3 Camaro 2SS/RS M6 Join Date: Jun 2012 Location: Dark of the Moon Posts: 1,460 View My Garage	No worries. __________________ Another 1 of 371 '12 T3 LS3 M6's built.

06-25-2013, 03:25 AM	#3
K32 Camaro V8 lounge member #5 Drives: 12 2SS Synergy Camaro, 05 PontiacG6 Join Date: Dec 2011 Location: Ohio Posts: 1,301	I've heard that E85 can eat up the O-rings used in your fuel lines, which is why aftermarket pumps specify if they're for E85 or not. (No idea if this is true..)

06-25-2013, 10:20 AM	#6
1Slow6.2 Drives: 2013 1LE camaro Join Date: Apr 2013 Location: NorCal/Abilene Posts: 383	Thanks for the input. It's not like I'm going to be dumping gallons and gallons of E85 into the tank. Just wondering since the highest grade fuel I can get here is 91 and it's diluted 10% ethanol already In it. I already don't get the best mileage with the 91 & 10% blend added. Just wanted to run like 2 or 3 gallons of E85 with the base 91. Just want to make sure I don't fry anything or erode fuel lines etc.. Sent from my hip pocket.. While slapping 5th.. As you're reading my plate