[s-cars] 3071 turbo & Pastore RS2 code question - MORE INFO update!

[djdawson2 at aol.com]

Chris...
See what you've got first.  Measure your boost... run it for a week and see if you have any detonation.  If everything seems OK, and the boost level isn't going too high, then MAYBE toss the spring in for giggles... and let us know when you hear the first signs of rod knock.
 
Dave 
 
-----Original Message-----
From: chris chambers <fastscirocco_2000 at yahoo.com>
To: djdawson2 at aol.com; forgied at ae.ca; s-car-list at audifans.com
Sent: Tue, 21 Mar 2006 12:25:07 -0800 (PST)
Subject: Re: [s-cars] 3071 turbo & Pastore RS2 code question - MORE INFO update!


Gentz,

Figured out that the ECU was only seeing 8 psi (max)while the turbo was
obviously putting out considerable more.

Short story, the ECU boost feed line hooks to three lines that are
hooked together on the back of the engine. Evidently there was a
partial obstruction as the lines could be easily blown through with
what little pressure teh human moouth produces, but only allowed max 8
psi. As an interesting coincidence, this was also the place that I had 
selected to pick up the boost signal for the N75 valve. Replaced these
lines and the problem is solved.

So now I am tempted to try the 1.9 bar spring just for scientific
purposes because I wonder if that caused the pinging or if the ECU/N75
only sensing  max of 8 psi boost is the culprit?

Any thoughts on this?

Thabnks again!
Chris


--- djdawson2 at aol.com wrote:

> Well... I did acknowledge that such mods on a 248k engine were...
> well... a bit much.  The largest risk being the rod bearings, and
> really nothing else.  I also recommended he NOT run a larger WG
> spring.
>  
> For point of reference... my car made 325whp with that software and
> all the RS2 parts... no ping, and no toulene.  Another point... I use
> my car between 30 and 40k miles per year.  My car spent (with RS@
> parts) a great deal of time at or near sea level... again... no ping.
>  This is also "just fact, and not speculation."  The only location
> where I had issues was in California, where the fuel was clearly not
> up to the task.
>  
> Further... I ran that same software to over 400whp (with a GT30R0)...
> with a wideband displaying an excellent A/F R... and still, no
> issues.  Finally... I ran that software for several weeks with a
> GT3071 turbo... and again, no issues.
>  
> Chris (fastvw) WILL be able to make that software work just fine in
> his car.
>  
> Dave
>  
> -----Original Message-----
> From: Dave Forgie <forgied at ae.ca>
> To: djdawson2 at aol.com; s-car-list at audifans.com
> Sent: Tue, 21 Mar 2006 09:49:42 -0700
> Subject: Re: [s-cars] 3071 turbo & Pastore RS2 code question
> 
> 
> Dave:  I know Uncle  Bob didn't actually write the code.  I also
> "know"  
> (believe) the two chips were not originally developed as a pair but
> have
>  been "married" from two sources, e.g. MTM and Thomas Schmalz.   But
>  that is not the point.  The point is the software is fairly
> aggressive timing
>  and boost-wise, e.g. 317 whp running 10L toluene with 70 L of 94
> with an
>  RS2 turbo and injectors = about 396 crank hp from one of our club
> cars.
> 
> Put this together with the 1.9L WG spring and an engine with 248,000 
> 
> miles and I still contend its a receipe for a "bomb"/grenade.  As I  
> suggested, either the "Pastore" software and a stock WG spring (which
>  
> you agreed with) OR the MRC software and the 1.9 bar WG spring BUT  
> NOT the "Pastore" software AND the 1.9 bar WG spring.
> 
> And on the issue of pinging, I bet none of the long-term users of the
>  
> "Pastore" software live at sea level like we do.  The combination of 
> 
> aggressive timing, etc. and dense air just doesn't work as well as
> other  
> places in North America and results in lean air fuel ratios that
> cause  
> pinging at WOT. That's just a fact, not speculation.  
> 
> Cut the red wire.
> 
> Dave F.
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> 


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