e85 on 11:1 compression

GreenMustang00 · October 30th, 2011, 11:17 PM

I will be running 11:1 compression on my 351w motor. Running this compression would I be better off running e85 or 93 octane.
I know fuel consumption will go down but I don't want this taken into account. It won't be a daily driver so I don't care much for the mpg.

-I haven't worked on upping my fuel system yet but the whole thing is getting redone.
-Motor is carburated.
-I live in Wisconsin so there's e85 stations all over.

Thanks

Mikel89us · October 30th, 2011, 11:43 PM

E85 is 104 octane i believe. So you can pack more timing into it, plus the extra fuel in the chamber will raise your dynamic compression ratio.

69fastback · October 31st, 2011, 07:03 AM

If you can set it up for E85, it'll do much better.

steveofire · October 31st, 2011, 10:02 AM

e85 is 105 octane durning the summer but when it gets close to winter they change it to e70 which will run a lot richer but like the other guys said you will love it I switched his year my self and love it I was able to run 5 degrees more timing with the turbo, Intake charge went down as e85 burns cooler. one draw back is you have to change your oil more often because of the deposits in e85 but for the price you pay for gallon and the performance you get out it well worth the switch over

horsepowerjunkie · October 31st, 2011, 10:23 AM

We've been running E85 in my son's 87 Notch 12:1 427w bracket racer for the past 3 summers. We had the carb converted to E85 by Pro Systems(awsome carb). It does burn alot more(we went from mid 80's jets to 101/105)for E85. ProSystems also told us a 220GPH fuel pump minimum. We use a BG 280. Also takes quite a while to get up to operating temp(burns much cooler), but after a run it cools back down quick. And yes, you can smell it in your oil after a couple weekends. Don't try to run the car in a garage, the fumes stink something terrible!!

GreenMustang00 · October 31st, 2011, 10:39 AM

I was going to go overkill with the fuel pump anyways. The only cost difference will be the carb. I am sure I can find a deal somewhere on one.

Horsepowerjunkie. What kind of fuel line are you running? Stock or a different style?

horsepowerjunkie · October 31st, 2011, 11:22 AM

Originally Posted by GreenMustang00

I was going to go overkill with the fuel pump anyways. The only cost difference will be the carb. I am sure I can find a deal somewhere on one.

Horsepowerjunkie. What kind of fuel line are you running? Stock or a different style?

We are running -10 braided, from the fuel cell to the pump, after the pump 1/2" aluminum to the firewall, then -8 braided to the fuel log, then 3/8" alumunum after the BG regulator, back to the top of the fuel cell.

October 30th, 2011, 11:17 PM	#1
GreenMustang00 1 Wheel Peel 2000 Mustang 393w 2001 Mustang GT Vert Join Date: Mar 2010 Location: Wisconsin Posts: 3,583 iTrader: 4 reviews	e85 on 11:1 compression I will be running 11:1 compression on my 351w motor. Running this compression would I be better off running e85 or 93 octane. I know fuel consumption will go down but I don't want this taken into account. It won't be a daily driver so I don't care much for the mpg. -I haven't worked on upping my fuel system yet but the whole thing is getting redone. -Motor is carburated. -I live in Wisconsin so there's e85 stations all over. Thanks __________________ 2000 393w Swapped Vert 2001 GT Vert 2002 Six Banger

October 30th, 2011, 11:43 PM	#2
Mikel89us Regular 1991 Mustang 2.3L 11:42 @ 61 in the 1/8th Join Date: Feb 2011 Location: Logansport, IN Posts: 366 iTrader: 0 reviews	E85 is 104 octane i believe. So you can pack more timing into it, plus the extra fuel in the chamber will raise your dynamic compression ratio. __________________ 1991 Mustang LX 2.3L 5 Speed convert 1989 Ranger 4X4 2.3L 5 Speed Entire turbo kit waiting to be used again.

October 31st, 2011, 07:03 AM	#3
69fastback Premium Member 1969 Mustang Mach 1 6.824@101.61 Join Date: Aug 2006 Location: Oklahoma jackass, get to driving Posts: 5,565 iTrader: 0 reviews	If you can set it up for E85, it'll do much better. __________________ ./___ _ ____ ___ \. ( ]]] _ _ O _ _ [[[ ) \_ o _ _____ _ o _/ \|___\| ......... \|___\| http://www.youtube.com/watch?v=HyYU3...e_gdata_player

October 31st, 2011, 10:23 AM	#5
horsepowerjunkie Hardcore Enthusiast 1989 Black LX---Turbo Join Date: Jun 2010 Location: just outside Minot, ND Posts: 1,153 iTrader: 0 reviews	We've been running E85 in my son's 87 Notch 12:1 427w bracket racer for the past 3 summers. We had the carb converted to E85 by Pro Systems(awsome carb). It does burn alot more(we went from mid 80's jets to 101/105)for E85. ProSystems also told us a 220GPH fuel pump minimum. We use a BG 280. Also takes quite a while to get up to operating temp(burns much cooler), but after a run it cools back down quick. And yes, you can smell it in your oil after a couple weekends. Don't try to run the car in a garage, the fumes stink something terrible!! __________________ 89 LX Black, Boss 331, C4,T76BB, FAST EFI 82 Capri RS,89 5.0 HO,Comp XE266,TW 170,T5,etc. 73 Dart Sport 340, 410ci Bracket Brawler 72 Demon 340 4-speed 1 of 1667 01 Ram Quad Cab 03 Grizzley 660

October 31st, 2011, 10:39 AM	#6
GreenMustang00 1 Wheel Peel 2000 Mustang 393w 2001 Mustang GT Vert Join Date: Mar 2010 Location: Wisconsin Posts: 3,583 iTrader: 4 reviews	I was going to go overkill with the fuel pump anyways. The only cost difference will be the carb. I am sure I can find a deal somewhere on one. Horsepowerjunkie. What kind of fuel line are you running? Stock or a different style? __________________ 2000 393w Swapped Vert 2001 GT Vert 2002 Six Banger

October 31st, 2011, 10:02 AM	#4
steveofire Regular 1994 Mustang Cobra Join Date: Mar 2011 Location: Minnesota Posts: 185 iTrader: 0 reviews	e85 is 105 octane durning the summer but when it gets close to winter they change it to e70 which will run a lot richer but like the other guys said you will love it I switched his year my self and love it I was able to run 5 degrees more timing with the turbo, Intake charge went down as e85 burns cooler. one draw back is you have to change your oil more often because of the deposits in e85 but for the price you pay for gallon and the performance you get out it well worth the switch over

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