how much ethanol can stock fuel pumps take?

papaman1234 · 10-28-2023, 09:46 PM

Looking to run e50 but do I need a hpfp? Or can stock fuel pumps handle it just fine?

misterpiz · 10-29-2023, 06:41 AM

Plenty of e50 builds with just FF kit

turbojg · 10-29-2023, 07:37 AM

FF - Fantasy Football??????

TopJimmy · 10-29-2023, 08:47 AM

I run the E50 tune just fine on my all stock setup with BM3/Femto. OEM cats on too…

The stock gap on our BMW/NGK spark plugs is 0.025” so there’s no need to change those either.

papaman1234 · 10-29-2023, 09:07 AM

Quote:

Originally Posted by turbojg

FF - Fantasy Football??????

Flex fuel

turbojg · 10-29-2023, 09:18 AM

Quote:

Originally Posted by papaman1234

Flex fuel

Thank you. I'm not familiar with all the acronyms yet. When I looked FF up Fantasy Football was all that showed up.

papaman1234 · 10-29-2023, 09:31 AM

Quote:

Originally Posted by TopJimmy

I run the E50 tune just fine on my all stock setup with BM3/Femto. OEM cats on too…

The stock gap on our BMW/NGK spark plugs is 0.025” so there’s no need to change those either.

I’m gonna be running a stage 2 e50 tune. Stock gap still good for that?

TopJimmy · 10-29-2023, 08:13 PM

Quote:

Originally Posted by papaman1234

I’m gonna be running a stage 2 e50 tune. Stock gap still good for that?

Yep!

mike@x-ph.com · 10-30-2023, 11:17 AM

Depends on your tune.

If the car is stock or is using a piggyback, i would not go over E40

Using bootmod3 with their flex fuel kit and multi-map, you can do 100% E85.

the tune will max out at E55, but no harm in using 100% E85

10-28-2023, 09:46 PM	#1
papaman1234 Private First Class 38 Rep 128 Posts Drives: BMW g80 m3 Join Date: Jul 2023 Location: Boston MA iTrader: (0)	how much ethanol can stock fuel pumps take? Looking to run e50 but do I need a hpfp? Or can stock fuel pumps handle it just fine?
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10-29-2023, 06:41 AM	#2
misterpiz Private 66 Rep 83 Posts Drives: BMW M3 Join Date: Mar 2023 Location: New Jersey iTrader: (0)	Plenty of e50 builds with just FF kit
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10-29-2023, 07:37 AM	#3
turbojg Lieutenant 372 Rep 486 Posts Drives: 2024 G82 M4 Comp. X-Drive Join Date: Jul 2023 Location: NE PA iTrader: (0)	FF? FF - Fantasy Football??????
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10-29-2023, 08:47 AM	#4
TopJimmy Major General 5524 Rep 5,198 Posts Drives: 2023 M3 Comp xDrive Join Date: Jul 2019 Location: Chester County, PA iTrader: (5)	I run the E50 tune just fine on my all stock setup with BM3/Femto. OEM cats on too… The stock gap on our BMW/NGK spark plugs is 0.025” so there’s no need to change those either. __________________ '18 F80 Base 6MT \| '19 F82 Exec DCT \| '18 F82 Comp Exec DCT \| '23 G80cx
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10-30-2023, 11:17 AM	#9
mike@x-ph.com BimmerPost Supporting Vendor 24446 Rep 191,382 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	Depends on your tune. If the car is stock or is using a piggyback, i would not go over E40 Using bootmod3 with their flex fuel kit and multi-map, you can do 100% E85. the tune will max out at E55, but no harm in using 100% E85 __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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