E85 in Gas

mgrych · 04-28-2014, 11:01 AM

When calculating for the correct amount of E85, does anyone consider the fact that most gas has up to 10% ethanol? I'm running like 35% E85 with 65% 93 oct. And it's been giving me issues. Like at WOT it will skip/ stutter slightly... the higher the %of E85 I use the more it does this.. Is it possible that im actually running like 45% because of the 10% that's already in it? Also that stutter, is that the fuel pump unable to pump the required volume because of the E85 ?

135Pats · 04-28-2014, 11:16 AM

Of course. It all depends on where you fill, which is why it’s important to test the % of ethanol in “E85” as well as the pump gas. If you have a supplemental pump the +/- 10% isn’t going to make a big difference on the fueling side, but with a stock pump it could put you over the edge of available fuel. Hence the missing up top, though on stock frames it’s usually spool that really tanks HPFP PSI.

j_marinelli · 04-28-2014, 05:46 PM

Found this on Cobb's website:

Maina · 04-28-2014, 06:41 PM

Hey guys, am I going to be safe if I run 30% E85 with 70% E10 (93 with 10% ethanol) with just a Cobb stage 1 Aggressive and DCI? I have a station nearby that offers both and really want to try it, but not sure if its doable since I am just on Stage 1?

04-28-2014, 11:01 AM	#1
mgrych Private First Class 24 Rep 163 Posts Drives: 08 BMW 135i M-Sport Join Date: Oct 2013 Location: Green Bay iTrader: (0)	E85 in Gas When calculating for the correct amount of E85, does anyone consider the fact that most gas has up to 10% ethanol? I'm running like 35% E85 with 65% 93 oct. And it's been giving me issues. Like at WOT it will skip/ stutter slightly... the higher the %of E85 I use the more it does this.. Is it possible that im actually running like 45% because of the 10% that's already in it? Also that stutter, is that the fuel pump unable to pump the required volume because of the E85 ? __________________ 08 BMW 135i--JB4--DCI--CPE Downpipes--AFE Exhaust--FMIC--ER Charge Pipe W/TiAL BOV--EC-7 Wheels--Rieger Diffuser
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04-28-2014, 11:16 AM	#2
135Pats Major General 456 Rep 6,478 Posts Drives: A few BMWs Join Date: May 2012 Location: Maryland iTrader: (3)	Of course. It all depends on where you fill, which is why it’s important to test the % of ethanol in “E85” as well as the pump gas. If you have a supplemental pump the +/- 10% isn’t going to make a big difference on the fueling side, but with a stock pump it could put you over the edge of available fuel. Hence the missing up top, though on stock frames it’s usually spool that really tanks HPFP PSI. __________________ E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP F30 N55 XDrive EBII
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04-28-2014, 05:46 PM	#3
j_marinelli Private First Class 508 Rep 145 Posts Drives: 2015 Mustang GT Join Date: Aug 2012 Location: Spring Branch, TX. iTrader: (2)	Found this on Cobb's website:
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04-28-2014, 06:41 PM	#4
Maina Enlisted Member 3 Rep 40 Posts Drives: x3 35i Join Date: Oct 2011 Location: Des Plaines, IL iTrader: (0)	Hey guys, am I going to be safe if I run 30% E85 with 70% E10 (93 with 10% ethanol) with just a Cobb stage 1 Aggressive and DCI? I have a station nearby that offers both and really want to try it, but not sure if its doable since I am just on Stage 1? __________________ Current - 2011 x3 35i/BMS Stage 1 Previous - 2008 Montego Blue 135i/M-sport /BMS-DCI/Cobb stage1 aggressive /235s Potenza s04 Pole Position - 265s Potenza RE11 /ATE TYP 200/EBC Yellow Stuff/NGK 5992s/Slotted and drilled rotors
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