[urq] Verification needed: 2.5bar 3B folk

Frank de Kat fdekat at sentex.net
Wed Oct 14 19:17:36 PDT 2015


As a (fair bit of work) data point:  What if you put your old pump  
back in, for a test?
(Was there something wrong with it?)

A bit of work, but could point you in the right direction of the  
problem very quickly?


> Message: 1
> Date: Tue, 13 Oct 2015 18:20:13 -0700
> From: Talisman <talisman05 at gmail.com>
> To: urq at audifans.com
> Subject: [urq] Verification needed: 2.5bar 3B folk?!
> Message-ID:
> 	<CAL2K9=x=5dyVxZwAPX0rDZ_JpXR5OJo2FUyv2oRne6-pgcTvVA at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
> Still trying to figure out my (apparent) fuel starvation under boost issue.
> I was previously using a 944 fuel pump with a "pinched" ~4bar regulator,
> both installed by previous owners. Since I replaced the pump with an OE
> spec unit, I have been getting "limp home" behavior and lean mixture
> readings every time I get into boost.
> My recollection was that some years back several folks had told me that a
> stock urq pump and a stock 3bar 3B regulator were sufficient for 2.5bar
> performance on 3B'ed cars.
> After checking almost everything else I can think of, I am wondering if the
> combination of the OE spec pump and unnecessarily pinched regulator might
> be the problem.
> The reason I'm soliciting the help is I found the OE Bosch regulator on
> Amazon for $80 with prime shipping and I am mulling going ahead and getting
> it since I wanted to get back to that route anyway (if I understand
> correctly that this will work just fine with the higher boost setup).
> If anyone can confirm that the stock parts work fine with the 2.5bar 3B, I
> would be most appreciative!
> Thanks,
> Jon

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