[BiturboS4] dyno results

Scott stiles_s at hotmail.com
Wed Apr 2 19:48:39 EST 2003

Couldn't you just infer from your "stock" dyno?
By my calculations, a 22.5% correction gets you 250hp from 204 at the
wheels. Using the same correction gets you 318hp chipped...

-----Original Message-----
From: biturbos4-admin at audifans.com [mailto:biturbos4-admin at audifans.com] On
Behalf Of Ian Duff
Sent: Wednesday, April 02, 2003 3:32 PM
To: 'California Fields'; biturbos4 at audifans.com

The dyno operator should have been able to do coast-down driveline drag
measurements and tell you pretty accurately what these numbers are on your
car. Anecdotally, somewhere closer to 25% has been reported by Euro tuners
like MTM on the I5 cars developing somewhat more hp, but with similar
driveline. In the elusive search for accurate non-interpreted/raw data, your
reporting of at-the-wheels results, along with altitude and temp is pretty
close to raw. The only thing missing is barometric pressure to allow for
atmoshperic correction, but that'd be splitting hairs <g>.

In what format is the raw data? Text file? CSV? Proprietary? Did you look at
the Dynojet site to see what they recommend as a reader?

Good job, and thanks for posting raw results.

-Ian Duff.
-----Original Message-----
From: biturbos4-admin at audifans.com
[mailto:biturbos4-admin at audifans.com]On Behalf Of California Fields
Sent: Wednesday, 02 April 2003 17:48
To: biturbos4 at audifans.com
Subject: [BiturboS4] dyno results

[ Converted text/html to text/plain ]

I took my car down to ATP (www.atpturbo.com[1]) in Fremont, CA for a dyno
last night. The guys were nice and it was a fun time recording my car.

So, I did two runs with my GIAC-X chip and then two runs with the stock
We let the car cool down for about 5 minutes in between runs (had the fans
going too). Air temps were about 68 degrees.  Altitude about sea level.
Gasoline was the crappy 91 octane from the pump. I only took two runs of
due to my tight  budget :)  Anyway, results were about 260hp/316lbs measured
at the wheels for the GIAC runs.  Does this sound about right?  Stock was
about 204hp/242lbs torque.  See my signature for mods. I have the raw data
also dynograph for anyone that is interested (I didn't want to upload a
to the group - is that allowed?).

How do I get crank hp?  I was reading AudiWorld and it doesn't seem like
is a set number.  Is 18-20% commonly accepted for our cars?  The dyno was a
DynoJet 248C (with 4WD option).

Lastly, anyone know where I can get software to view the raw data? It would
nice to take a look.
Carter Fields, San Francisco
2001.5, GIAC-X, Miltek 3" cat-back, Strat. shifter, Strat. DVs, A-pillar

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  1. http://www.atpturbo.com
  2. http://g.msn.com/8HMDENUS/2731

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