JB4 fuel/map question

N55xS54 · 04-25-2017, 03:11 PM

Looking for educated opinions: please only comment if you have real time data or experiences! I have a 2013 135i N55 with Jb4/BMS intake/ CP/ DP.... I am running map 5 with about 35% E85/91 blend. Car runs great, a bit inconsistent but feels solid. My question is this. Anyone run 100oct / map 5? If so was it any better or stronger than E85/91 blend? I know E85 is way less cost but let's not factor in price. I have a local 100oct Sunoco pump at $9.50 a gal and don't mind paying the price if it's any better. Any opinion? Also, for map 7, would MS109 be a good choice? Thanks

N55xS54 · 04-27-2017, 10:59 AM

Anyone????

ShocknAwe · 04-28-2017, 05:07 PM

Youd be better off posting a log of current tune. Could be octane issues, but could be other factors in which case it would be better to fix hardware, then worry about adding fuel.

Also need to see if your LPFP can handle the 35% E.

N55xS54 · 04-29-2017, 10:20 AM

Quote:

Originally Posted by ShocknAwe

Youd be better off posting a log of current tune. Could be octane issues, but could be other factors in which case it would be better to fix hardware, then worry about adding fuel.

Also need to see if your LPFP can handle the 35% E.

I have no issues currently. Running 35% E85 to 91 blend. Just seeing if anyone has experience with straight 100oct or MS109.... Planning on getting the car to Terry to dyno/log the car. I do not mind running the expensive stuff..... Just looking for experienced opinion before I spend $150+ per fill up. Thanks

ShocknAwe · 04-29-2017, 06:41 PM

Fair. Nothing wrong with running 100 octane fuel, as long as its unleaded. But... Logic check. Why not sink the money into port injection and run straight e85.

N55xS54 · 04-29-2017, 07:35 PM

Quote:

Originally Posted by ShocknAwe

Fair. Nothing wrong with running 100 octane fuel, as long as its unleaded. But... Logic check. Why not sink the money into port injection and run straight e85.

Im new to this. I come from american muscle on E85. I have a lot to learn. Ill do some research on that! any helpful links?

ShocknAwe · 04-29-2017, 08:13 PM

A couple other sites which are generally more technical. I'll pm you.

04-25-2017, 03:11 PM	#1
N55xS54 New Member 1 Rep 18 Posts Drives: 2013 135I Join Date: Mar 2017 Location: Huntington Beach, CA iTrader: (0)	JB4 fuel/map question Looking for educated opinions: please only comment if you have real time data or experiences! I have a 2013 135i N55 with Jb4/BMS intake/ CP/ DP.... I am running map 5 with about 35% E85/91 blend. Car runs great, a bit inconsistent but feels solid. My question is this. Anyone run 100oct / map 5? If so was it any better or stronger than E85/91 blend? I know E85 is way less cost but let's not factor in price. I have a local 100oct Sunoco pump at $9.50 a gal and don't mind paying the price if it's any better. Any opinion? Also, for map 7, would MS109 be a good choice? Thanks
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04-27-2017, 10:59 AM	#2
N55xS54 New Member 1 Rep 18 Posts Drives: 2013 135I Join Date: Mar 2017 Location: Huntington Beach, CA iTrader: (0)	Anyone????
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04-28-2017, 05:07 PM	#3
ShocknAwe 1Addict 3231 Rep 7,890 Posts Drives: E82 Mutt, M57 Truck Join Date: Jul 2012 Location: Charleston iTrader: (22)	Youd be better off posting a log of current tune. Could be octane issues, but could be other factors in which case it would be better to fix hardware, then worry about adding fuel. Also need to see if your LPFP can handle the 35% E. __________________ 2010 135i 6MT Jet Black N54/3 FE82 Mutt \| BUILD THREAD \| GARAGE SALE
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04-29-2017, 06:41 PM	#5
ShocknAwe 1Addict 3231 Rep 7,890 Posts Drives: E82 Mutt, M57 Truck Join Date: Jul 2012 Location: Charleston iTrader: (22)	Fair. Nothing wrong with running 100 octane fuel, as long as its unleaded. But... Logic check. Why not sink the money into port injection and run straight e85. __________________ 2010 135i 6MT Jet Black N54/3 FE82 Mutt \| BUILD THREAD \| GARAGE SALE
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04-29-2017, 08:13 PM	#7
ShocknAwe 1Addict 3231 Rep 7,890 Posts Drives: E82 Mutt, M57 Truck Join Date: Jul 2012 Location: Charleston iTrader: (22)	A couple other sites which are generally more technical. I'll pm you. __________________ 2010 135i 6MT Jet Black N54/3 FE82 Mutt \| BUILD THREAD \| GARAGE SALE
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