FW: [200q20v] vs S4 injectors.

[Bernie Benz]

Verry interesting!  Do you have any idea what fuel pressure that the 7A
runs?

Bernie

----------
> From: Brian.Link at Level3.com
> Date: Mon, 18 Dec 2000 13:24:23 -0700
> To: C1J1Miller at aol.com
> Cc: 200q20v at audifans.com
> Subject: RE: [200q20v] Mixture....advice needed
> 
> You nailed it Chris,
> bosch part number for the 91 3B injector is 0280 150 737
> my injector is bosch part number 0280 150 951 which is the S4 injector.
> the 3B is at 3.0 Bar the S4 is at 4.0 Bar.
> Now what?  will a S4 regulator fit?  I guess I will have to get an
> adjustable one.
> 
> Thanks
> Brian Link
> 
> Boulder, CO
> 
> 
> 
> -----Original Message-----
> From: C1J1Miller at aol.com [mailto:C1J1Miller at aol.com]
> Sent: Monday, December 18, 2000 10:21 AM
> To: Link, Brian
> Cc: 200q20v at audifans.com
> Subject: Re: [200q20v] Mixture....advice needed
> 
> 
> I'd start by getting on the phone with RevSport and finding out what the
> injectors are, relative to stock.
> At idle and low boost, the o2 sensor will adjust the amount of fuel to keep
> you near stoichiometric; at partial boost levels on up it is map-driven.
> 
> If the injectors flow less, then you'd be running lean.  If the injectors
> expect higher fuel pressure (like the urS4/6, which runs about 0.5 bar
> higher fuel pressure), then you'd also be lean... perhaps switching to the
> urS4/6 fuel pressure regulator is in order?
> 
> Could also be the gauge, but that seems unlikely; it probably reacts slowly
> when under boost, but will still react.
> 
> Chris
> 
> 
> In a message dated Mon, 18 Dec 2000 12:12:04 PM Eastern Standard Time,
> Brian.Link at Level3.com writes:
> 
> << If I have already asked this question then sorry for the repeat.
> I need your opinions,  What would cause my car to run lean from about 6psi
> up to where I hit the point where I trip the computer to go full rich.
> I've been through Scott M's web site and I think it might be either a vacuum
> leak or a bad fuel regulator.
> 
> No error codes stored.
> New throttle position sensor.
> New BV
> New fuel filter
> recent techron treatment.
> new vacuum tubes from BV to IM, from fuel regulator to IM, breather hoses
> are soft but solid.
> 
> I installed an autometer Air/fuel gauge and I feel this slight stumble when
> it goes lean but no missing or stumbling, the car doesn't fall on its face.
> 
> could be bad fuel regulator, Is there a place to hook up a fuel pressure
> gauge tot he rail?
> Could my TAP chip have bad fuel table mapping...not very likely.
> I have supposedly different then stock injectors, RevSport installed RC
> injectors..I don't now what size.
> Vacuum leaks, where is the best place to check.
> fuel pump going south?
> 
> any advice on my problem is appreciated.  In fact I would have never known I
> had a problem if I didn't install that gauge.  Stupid gauge
> 
> thanks
> 
> Brian Link
> _______________________________________________
> 200q20v mailing list
> 200q20v at audifans.com
> http://www.audifans.com/mailman/listinfo/200q20v
>>> 
> 
> _______________________________________________
> 200q20v mailing list
> 200q20v at audifans.com
> http://www.audifans.com/mailman/listinfo/200q20v