[200q20v] RS2 & 3B - Fueling Around

Greg Johnson gregsj2 at attbi.com
Sat Jan 19 16:54:03 EST 2002

Fellow Audians,

I need some advice and counsel from our RS2 & 3B knowledgeable folks.

Baseline: the brakes and suspension have been upgraded. I had a
custom-built mandrel bent exhaust system with high flow cats and a high
flow muffler installed. A K&N panel filter resides in the stock air box.
I'm running IA III+ software with a 2.5 kPa transducer.
Oh yeah, we live at about 2000 feet above sea level.

Upgrade: I want to add some RS2 parts. I don't want to do the full RS2
monty (beyond my budget) but I would at least like to add the RS2
manifold and turbo.

Question: is the stock 3B fuel system sufficient to handle this upgrade,
or will it be lean at full boost and cause my engine to be at risk?
What happens if I add the RS2 MAF to the equation? Does this help the
potential fueling issues or does it exacerbate the problem?

If there is a fueling issue, will either camshaft help?

BTW, I've heard that if you add the RS2 injectors to a stock 3B fuel
system, it runs too rich.

Many thanks for your help.

Greg J

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