Pump gas fuel pump limits?

Kaane

Private
Jan 7, 2019
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2008 535i
If I am going to only run pump gas at what level is the stock low pressure fuel pump max out on a E60 535i?
 

Rcboosted2007

Lieutenant
Jan 28, 2018
902
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07 335i
Hey Kaane, are you referring to whp level? Are you looking to know how much horsepower you can support off of your oem supplied fuel system? If so This question is loaded with variables. Keep track of your data logs. That will prevail over anybody’s arbitrary numbers.Please dont base it off random people giving you “tested” numbers.There are several post here, which you may try narrowing down with the search bar.

If your looking to turn boost up, and begin on your way to making more power with the n54. I would first recommend boosting your fueling capability. Your wallet/budget will thank you, from preventing an engine loss. Today’s vendors have so many options now, and very competitive prices.
 

Kaane

Private
Jan 7, 2019
30
13
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2008 535i
My goals are only 400whp, so just making sure I am not buying anything I really don't need. I have inlets, downpipes and upgraded fmic. Do most bolt on setups that run pump require fuel pump?
 

SlowE93

Lieutenant
Jul 2, 2017
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E93
My goals are only 400whp, so just making sure I am not buying anything I really don't need. I have inlets, downpipes and upgraded fmic. Do most bolt on setups that run pump require fuel pump?
If you have a healthy hpfp and lpfp you can make 400whp. E30 mix or E40 depending on your logs. If not, a simple inline fuel pump and you should be fine as far as fueling is concerned.
 

Seaneezy

Corporal
Mar 12, 2018
130
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e90 LCI 335i
My goals are only 400whp, so just making sure I am not buying anything I really don't need. I have inlets, downpipes and upgraded fmic. Do most bolt on setups that run pump require fuel pump?
With FBO and a tune, you should be able to hit 400whp on pump gas. I run CA91 piss fuel with all my mods and only put down around 430whp. For more power, you need ethanol or higher octane fuel. If you want to run ethanol, you just need a wahlbro 450 pump thats compatible with e85
 

Torgus

Major
Nov 6, 2016
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Boston
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ACF 6466 E92 + METH
93 pump gas stock twins peak record is 423hp 500 wtq w/ inlets, no outlets. Usually on MHD 2+ you should dyno at or close to 400whp at some point in the rev range.
 

PFS

Corporal
Premium Vendor
Nov 19, 2018
156
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335i
Always a good idea to have a LPFP upgrade, but if you're not sure and are slowly turning boost up, just monitor your low pressure fuel sensor, ideally you want to be above about 50 psi at the HPFP inlet. If you're dipping down and/or your fuel trims are looking positive at higher RPM, or (worst) your A/F target is a little leaner than you want... definitely past time to upgrade the low pressure side.
 

Rcboosted2007

Lieutenant
Jan 28, 2018
902
89
0
Parts unknown
Ride
07 335i
 

Kaane

Private
Jan 7, 2019
30
13
0
Ride
2008 535i

There is no core charge. Floater not included.
Will not work on a 5 Series.