[s-cars] An interesting thought experiment...

[Eric Phillips]

Ahh, OK.

The turbo and EM then really don't matter, except for spool-up time
and/or reliability isses (RS2 EM being better for not burning valves.)

SO if I told Bob at MRC that I needed chips for fuel and boost, using
Bosch green-top injectors (the RS2 kind, IIRC), he'd know *exactly*
which fuel map to send me, yes?

Thanks, guys.  It's always an education.  :)

On 1/24/07, Mike Fitton <rfitton at vt.edu> wrote:
> I'll second that.  While I haven't (yet) gotten into alternative turbos,
> injectors, or EMs, it is my understanding that the software is really
> only tuned for the injectors.  Since the AAN came with MAF, MAP, and
> intake air temp sensors, it can always determine the exact amount of air
> entering the engine.  What I mean is, with only a MAP sensor, the ECU
> only knows the pressure, but we all know that different setups flow more
> or less air at the same pressure.  That's where the MAF and IAT sensors
> come in.  Technically, you should only need any two of these sensors to
> have all the necessary data, but I can't see how all three would hurt
> anything.  The only catch is that the software has to know pretty
> exactly what kind of injectors you have.  Overall, the setup makes basic
> tuning very easy.
>
> -Cheers!
> Mike
>
> djdawson2 at aol.com wrote:
> > If your software is matched with your injector size, you can throw a wide variety of turbos on the engine and achieve good results.  I have run a bunch of different turbos with the hybrid RS2 software that Steve Eiche/Bob Patore have, and all had good results.  The results were confirmed both on the dyno, and using a wideband O2 sensor monitoring A/F ratios.
> >
> > The largest turbo I used with the RS2 software was a GT30R (3076), and it worked fine.  I have also tested the T04E 46 trim, the T04E 50 trim, the T04E 57 trim, and the GT3071R.  All performed very well.
> >
> > HTH,
> > Dave
> >
> >
> > -----Original Message-----
> > From: gcmschemist at gmail.com
> > To: s-car-list at audifans.com
> > Sent: Wed, 24 Jan 2007 10:28 AM
> > Subject: [s-cars] An interesting thought experiment...
> >
> >
> > I may have a line on a relatively inexpensive RS2 EM.  Relative to new, that is.
> >
> > I have, currently, Bosch green tops sitting in my Rossatobin, and I
> > can see myself getting ahold of a used RS2 turbo some time, OR buying
> > something that is similar from 034EFI.  My goal is to NOT have to
> > rebuild the top or bottom end with stronger parts - just go with the
> > stock long block that came with the car!  :)
> >
> > I have MRC Stage 2 software, and I am ASSuming that if I got the RS2
> > s/w from them, I'd be doing OK if I put on the RS2 turbo/EM/injectors.
> >  No more mods required (maybe desired, but not required.)  But the
> > sticky part is this:  what if I went with one of Javad's hybrid
> > offerings?  Like the TO4E/K26?  where would my software be then?  MRC
> > in the U.S. is great for off-the-shelf packages, but when you start
> > throwing custom stuff their way, it could be tough for the European
> > guys to make timely tuning adjustments to the s/w.  Since I'm not a
> > whiz at reading compressor maps, what 034EFI offering is going to be
> > close enough to RS2 to make the s/w work and not put big, ol' holes in
> > my block or pistons?
> >
> > Am I going to have to go out looking for custom software for this
> > beast?  Like from IA?  The hardware part seems relatively simple if
> > I'm not going to go above about 380-400 crank HP.  But the s/w makes
> > me nervous, a little.  BTW, I am in the middle of nowhere, so it's got
> > to be Motronic-based, and should be a bit conservative as far a A/F
> > ratios go (leans rich, not leans lean, if you catch my drift.)
> >
> > :)
> >
> > Thanks, guys,
> >
> > Eric.
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>


-- 
Eric

1995 UrS6 "Silber Geist"