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      05-06-2009, 02:12 PM   #91
BavarianBullet's Avatar

Drives: 2014 Audi S5
Join Date: Jul 2008
Location: Connecticut

iTrader: (1)

Originally Posted by scottp999 View Post
and the fuel pump is not that expensive and should not be real hard DIY. So you can weigh all the work of returning to stock vs. the around $300 cost and labor to do it yourself. Sorry
I agree. Has anyone done a fuel pump on their own?

I'd guess it's not terribly hard to pull one off and put the other one on but I'd be interested in knowing if there are any special tools required or any unusual break-in procedures that if we missed them the pump might be toasted.

On topic: It seems we need to hook up some sort of air meter (MAF) to a stock airbox on a 335 and run a tune vs stock mode and see what the CFM drawn is.

It's been a while since I wrenched a lot on modded cars but I know pro-flow/pro-m sells MAFs with flow-bench cfm readings cross-referenced to MAF output voltages. I used these on mustangs in the past. If anyone had one, that could prove very useful with a basic datalogger, laptop and a 5V power source. You could measure cfm directly.
2014 Audi S5 DSG
2011 335xi Sedan (retired)
2008 335xi Sedan (retired)