[s-cars] ASW, AWDD, 402.4HP, ATW, NCFS, O91OPG(long)

[Scott Munger]

You're my hero (as are all the folks who contributed to your car).
With your Happer-turbo, when does the boost come on?  Does the smaller
turbine reduce lag noticably?

--Scott Munger
'93 S4
'97 Cabriolet



> -----Original Message-----
> From: s-car-list-admin at audifans.com
> [mailto:s-car-list-admin at audifans.com]On Behalf Of CaptMagu at aol.com
> Sent: Wednesday, June 11, 2003 7:02 AM
> To: s-car-list at audifans.com
> Subject: [s-cars] ASW, AWDD, 402.4HP, ATW, NCFS, O91OPG(long)
>
>
> --
> [ Picked text/plain from multipart/alternative ]
> s-heads
>
> Well, yesterday was a long day. It was finished off with me
> giving Dave Jones
> a well earned golf lesson at an indoor video feedback golf
> club I belong to.
> It started off at Autosport Werks yesterday afternoon with
> the Happersized
> machine finally finding its way on to their AWD dyno. The
> subject line at the top
> says it all. At the Autosport Werks all-wheel drive dyno we
> pulled 402.4 hp
> at the wheels not corrected for snot on 91 octane pump gas.
> Torque came to 393
> ft lbs.
>
> Conditions were hardly ideal which was just fine with me.
> Dave was a bit
> concerned because the temperature at the time of the run was
> 84 F. Factoring all
> the other weather factors, the desity altitude worked out to
> about 8500 ft. Did
> I mention that the conditions were not ideal?
>
> Thanks for this effort have to go out to of course Dave Jones
> and all the
> guys at ASW. He built this engine and has been responsible
> for almost all of the
> custom fabrication work that goes into making something that
> hasn't been made
> before. More thanks also go out to Mike Pederson who has been
> on a similar and
> often parallel track to mine. We have shared all our trials
> and failures. A
> final thanks to Jim Latour, the owner of Turbo Engineering,
> TEC, that built my
> turbo and provided the Garrett intercooler core.
>
> My turbo is a TA34/T04E 54 trim Garrett hybrid with a 360
> degree thrust
> bearing. No, its not a ball bearing type and it has a smaller
> turbine section than
> most of the larger turbos. This has caused some challenges
> mainly in the area
> of wastegate float. That's why I run a large double WG spring
> and use my Apexi
> AVC R to hold back the boost pressure. Matched up with this turbo is a
> standard RS2 exhaust manifold. The boost curve for all 6 runs
> were just beautifully
> smooth. No sharp angles and really reaffirmed for Dave just
> how nice the Apexi
> performs.
>
> Well, what happened on the dyno? The first run was setup with
> the Apexi on
> low boost or 24 psi. The car pulled 382hp with some very
> interesting fuel issues
> exposed. The mixture curve had us going rich between 3500 and
> 5000 rpm and
> right on from there to red line. A couple of more runs at
> high boost or 27 psi
> brought on a turbo surge that I really had not experienced
> with street driving.
> The fuel curve gave away the surge gremlin as rich mixture.
> We swapped in
> another ECU with some secret software compliments of Mike
> Pederson and we ran
> 391hp on high boost. The mixture was still a little rich
> passing mid range so we
> backed off the fuel pressure and voila, the final run gave us
> 402.4 with the
> mixture still showing some richness in the mid range and
> right on beyond that.
> Is there more power on the table? You betcha. We will be
> developing the SW to
> compensate for the richness issue and we continue to work on the surge
> gremlins. The turbo performed flawlessly and the FMIC did a
> remarkable job keeping
> the charge air cool despite the conditions. I did splash the
> FMIC with water
> between runs to alleviate the heat soak off the engine and
> turbo. Dave reported
> intake air temps right at the ambient temp for all runs.
>
> Are there issues with driving this car on the street? Yes, a
> couple. When I
> shift the bypass valve trumpets like a WRC rally car. The
> Honda crowd goes wild
> when they hear it. With the turbo under load climbing an
> incline and backing
> off rapidly on the throttle there is a surge that occurs.
> Beyond that it
> drives like a normal s-car with a little more oomph. Is it
> fun? Oh yeah. That's all
> for now but stay tuned for more.
>
> Hap, livin large in Everboost, Maguire
>
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