[200q20v] RS2 & 3B - Fueling Around

Fundsalo Racing fundsaloracing at yahoo.com
Sat Jan 19 19:43:26 EST 2002

Get a combo O2 + EFI % duty-cycle meter + EGT gage.

--- Brett Dikeman <brett at cloud9.net> wrote:
> At 4:54 PM -0800 1/19/02, Greg Johnson wrote:
> >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.
> I would think it would be possible to do just the
> turbo+manifold, but
> why bother...you'll get better performance from a
> $500 chip than you
> will from $2000+ for the above two components,
> -especially- since the
> RS2 turbo takes longer to spool up.  You should
> understand that
> switching turbos will NOT change the max boost level
> you see; it
> won't add any HP, because across the board, the ECU
> is the
> restriction, not the turbo.  You'll have to talk to
> Ned about getting
> new chips for the ECU.
> The manifold is a smart investment if you plan on
> running high levels
> of boost etc, but otherwise adds only minimal power
> in and of
> itself...less than 10hp I think.
> >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?
> The ECU, injectors, and MAF are a package
> together...you can't
> partially upgrade.
> >If there is a fueling issue, will either camshaft
> help?
> Nope,  cams have nothing to do with not enough
> fuel(or too much fuel.)
> >BTW, I've heard that if you add the RS2 injectors
> to a stock 3B fuel
> >system, it runs too rich.
> Correct, they're higher flow for the same pulse
> width+pressure, one
> of the reasons for the ECU mod.
> HTH(and I hope I got everything right :-)
> Brett
> --
> ----
> "They that give up essential liberty to obtain
> temporary
> safety deserve neither liberty nor safety." - Ben
> Franklin
> http://www.users.cloud9.net/~brett/
> http://www.users.cloud9.net/~brett/bdikeman.asc	(PGP
> Public Key)
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Part #1 We may please ourselves with the prospect of free and popular governments. But there is great danger that those governments will not make us happy. God grant that they may. But I fear that in every assembly, members will obtain an influence by noise not sense. By meanness, not greatness. By ignorance, not learning. By contracted hearts, not large souls...

John Adams

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