New Fuel Pump = faster car

theDude · 01-05-2008, 05:47 PM

So,

I finally got my car back after 2 weeks of waiting for a new fuel pump, and had a little bit of fun this morning. I only had time to do a single run, but managed to beat my previous best

It might be an outlier, but I plan on heading back to the same stretch for more runs tomorrow. The ambient temp was 50F, which is a tad warmer than my previous runs (44F). I also had 3/4 tank of gas this time, compared to 1/4 tank on my previous best run. Not a bad time considering more weight and higher temps.

This is all with a stock 08 coupe...pretty decent numbers I think. I'm curious to see if the new pump also helps with fuel efficiency; I was pretty much pegged at 16mpg before.

Maybe one of these days I'll get a dyno

hotrod182 · 01-05-2008, 08:48 PM

Thats right about where it should run stock. The steptronic is pretty efficient, looking at your graphs, and your terminal is pretty consistant. I would assume you have fairly low mileage? As the car breaks in you should solidly be in the 105mph range. Especially with lower temps and a lighter fuel load, you would probably be at 105 right now.

Sniz · 01-05-2008, 09:35 PM

Looking at that graph makes me wish i had the AT for drag racing reasons, too bad I enjoy rowing the gears so much!!

Looks great, enjoy the newfound power and smoothness.

01-05-2008, 05:47 PM	#1
theDude First Lieutenant 8 Rep 331 Posts Drives: '08 E92 335i Join Date: Jun 2007 Location: Virginia Beach iTrader: (0)	New Fuel Pump = faster car So, I finally got my car back after 2 weeks of waiting for a new fuel pump, and had a little bit of fun this morning. I only had time to do a single run, but managed to beat my previous best It might be an outlier, but I plan on heading back to the same stretch for more runs tomorrow. The ambient temp was 50F, which is a tad warmer than my previous runs (44F). I also had 3/4 tank of gas this time, compared to 1/4 tank on my previous best run. Not a bad time considering more weight and higher temps. This is all with a stock 08 coupe...pretty decent numbers I think. I'm curious to see if the new pump also helps with fuel efficiency; I was pretty much pegged at 16mpg before. Maybe one of these days I'll get a dyno
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01-05-2008, 08:48 PM	#2
hotrod182 . 812 Rep 3,974 Posts Drives: 2023 i4 M50 Join Date: Dec 2006 Location: California iTrader: (0)	Thats right about where it should run stock. The steptronic is pretty efficient, looking at your graphs, and your terminal is pretty consistant. I would assume you have fairly low mileage? As the car breaks in you should solidly be in the 105mph range. Especially with lower temps and a lighter fuel load, you would probably be at 105 right now.
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01-05-2008, 09:35 PM	#3
Sniz Lieutenant General 654 Rep 10,587 Posts Drives: e92 335 - gone // e36 M3 turbo Join Date: Mar 2007 Location: Ellicott City, MD iTrader: (1)	Looking at that graph makes me wish i had the AT for drag racing reasons, too bad I enjoy rowing the gears so much!! Looks great, enjoy the newfound power and smoothness. __________________
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