What are the limits of the stock fuel system on a E85 mix?

doublespaces

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Oct 18, 2016
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I never really understood why people want to run full E85 at lower power levels unless its merely for ease of use.
 

Mightbaal

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Apr 22, 2018
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2008 335xi E90
I never really understood why people want to run full E85 at lower power levels unless its merely for ease of use.

Safety... E85 105 octane burns cooler like Meth injection. Tunes are usually alittle leaner also for E85.
 

MDORPHN

Corporal
Jan 28, 2018
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Sounds great!

I understand that Flexfuel will allow engine to run more timing, but will it also be designed to allow higher levels of boost?

Thanks.

Neil
 

NoQuarter

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Nov 24, 2017
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Sounds great!

I understand that Flexfuel will allow engine to run more timing, but will it also be designed to allow higher levels of boost?

Thanks.

Neil

Hi Neal,

You should check out the flex fuel threads for more info. But the basics of it is you pick 2 different tunes - OTS or custom and assign them to a low E85 tune and high E85 tune. The flex fuel module simply interprets between them as the E content varies between them.

Jim
 
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fmorelli

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Aug 11, 2017
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You should check out the flex fuel threads for more info. But the basics of it is you pick 2 different tunes - OTS or custom and assign them to a low E85 tune and high E85 tune. The flex fuel module simply interprets between them as the E content varies between them.

Jim
Yeah, Jim I quoted it you and posted on the flexfuel thread.

Filippo
 

Rcboosted2007

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Jan 28, 2018
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07 335i
A lot of good info.Good luck with your fuel system.dont push to far into 500hp, for sake of injectors but It looks like you still have room in your setup for more power. Hope to see you break 10s!!
 

Rcboosted2007

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Jan 28, 2018
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I havent heard of an upgrade to the factory injecotrs.Factory injectors/system good for 500-550 alone. I upgraded system by adding port injection with 1055 cc injectors and 100% methanol on single cm10 nozzle with assistance of a stage 2 pump. I am however 100% e85
 

NoQuarter

Major
Nov 24, 2017
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Indiana, USA
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Z4 35is, 535xi, X5 35i
I havent heard of an upgrade to the factory injecotrs.Factory injectors/system good for 500-550 alone. I upgraded system by adding port injection with 1055 cc injectors and 100% methanol on single cm10 nozzle with assistance of a stage 2 pump. I am however 100% e85

nice... you got all the fuel going on here. I did Methanol in the charge pipe few years ago, I really liked it.
 

Hill'n'toe

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Mar 12, 2018
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Interesting post.
What could I expect from Stage 2 LPFP, everythig else stock and full e85 ?

Thx
 

colinod

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Aug 13, 2017
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2007 e92 335
Interesting post.
What could I expect from Stage 2 LPFP, everythig else stock and full e85 ?

Thx

400whp or so on a healthy hpfp. on an e blend i've seen up to 670whp on a 6466 setup with a single 450 intank, all direct injection. the limiting factor is your hpfp