[s-cars] tales from the dyno

[Mark Strangways]

Dave that is rather exciting, as you know I have made the "FrankenTurbo"
(tm) a GT30R x K26 hot side housing hybrid.\
While I utilize a stock or RS2 EM as opposed to the tube EM I expect similar
numbers.
I will be running stock MAF, 42 LB injectors, stock IC with water injection
after IC, Stromung 3".

Please send me a pic (offlist) of the EM as set-up in the car with the GT
installed if you can, I would love to see the relationships on your set-up.

Once my new MAF shows up, I will schedule some dyno time and share the
outcome as you have, I think that's great.
I really think that this GT30R will be a very good mod. Time will tell.

Thanks

Mark S
----- Original Message ----- 
From: <Djdawson2 at aol.com>
To: <s-car-list at audifans.com>
Sent: Tuesday, October 19, 2004 6:07 PM
Subject: [s-cars] tales from the dyno


> Well, at the tender age of 930 miles, I went and strapped the car onto the
> dyno.  For those who haven't kept up with the changes to the car... it is
a
> freshly rebuilt 2.2 using Carillo rods.  No other changes have been made
to the
> structure of the engine... no porting/polishing, no big throttle body, no
cams.
> In fact, this is a low cost effort.  The turbo and tube EM together cost
less
> than current RS2 figures.  The rods were the only significant expenditure.
>
> The car currently uses a stock IC, and the engine management is fully
> intact... no boost controller.  It has a tube header, a GT30R turbo, and a
3 1/2"
> exhaust from the turbo back.  The exhaust uses 2 mufflers.  I installed
the RS2
> MAF, injectors, and ECU using the popular hybrid software.
>
> The results were interesting...  the car put out 387hp and 413ft/lbs of
> torque.  On a different run, it put out 384/425.
>
> The engine was plagued with a problem, however.  As both curves were
heading
> skyward, the car experienced a "burp" at 4900rpm.  At this point, both
torque
> and hp figures dropped by about 30 units, and never recovered.  Observing
> boost, it was clear that the ECU didn't like something that was going on,
as the
> boost was drawn back about 10psi immediately (at 4900rpm), from its
previous
> 26psi peak, and was never let back above 19psi.  In other words... the
engine's
> peak torque and hp were posted right at the "burp," in the midst of a
> previously steady and sharp climb.
>
> My guess is that I may be running out of injector flow.  Additionally,
I've
> heard talk of the RS2 MAF also getting into trouble right around 400hp.
> However, the A/F graph certainly didn't indicate a shortage of fuel.
Possibly an
> out of tolerance intake air temp??
>
> Either way, the results are encouraging.  Considering the fact that
clearly
> an IC is in order, not to mention bigger injectors/MAF/software, I believe
this
> engine has quite some room to grow.  Oh the fun!
> Take care,
> Dave in CO (Everboost to be exact)
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