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

[Mike Fitton]

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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