VerrÜckt

A friend of mine in Germany split the cost of the new Gtech pro meter. Some of you may have heard of or used the old version which looks like a cheap radar detector. This new model is much better. It is much more capable, easier to set up, and offers many logging/analysis functions.

<a href="http://www.gtechpro.com/rr.html">Link to info on Gtech Pro RR</a>

<img src="http://www.gtechpro.com/images/RR.jpg">

Today is the first day I have messed around with it in the S4. The results were basically what I was expected and I have a feeling they are fairly accurate. I was running about 1/3 tank of German pump (approx 95 octane). My boost was set at 22 psi. Car was full weight with two passengers (250 (me) + 180 (pass) + 3630 = 4060 lbs).

Because the Gtech derives everything from vehicle acceleration, the horsepower figures are actually lower than WHP numbers. This is because road frictional losses and aerodynamic losses also must be factored in. I would estimate total losses at about 27% which would put me at around 475 flywheel hp and 510 ft-lbs of torque. Of course this is just playing with numbers, but I feel it's a good ballpark estimate.

I was pretty happy with the 0-60 time of 4.5 (with a 180 lb passenger). I didn't launch that hard (under 3k rpm) and had a little wheelspin. I'm quite sure 4.0 or better is attainable. Also note, the 60' and 1/8 mile times are not relevant as I had the "rollout" set to zero. Those who know dragracing will understand what that means.

Anyway, here's the data.

<img src="http://www.nogaroblue.com/s4/490hp.jpg">

<img src="http://www.nogaroblue.com/VAG/011505344hp.jpg">

<img src="http://www.nogaroblue.com/VAG/011505zero60.jpg">

Below is a comparison to Doc Slow's exceptionally quick Stage II+++ car.

<img src="http://www.nogaroblue.com/VAG/chrisvsjdhp.jpg">

On the speed graph (1st and 2nd gear), you can really see how the K16 car stretches its legs out by the end of 2nd. The 30-50, 40-60, and graph slopes show the difference. Both cars were short shifted into 2nd (and then WOT) as this is how the manual suggests to take hp readings.


<img src="http://www.nogaroblue.com/VAG/chrisvsjdspeed.jpg">


Lastly for fun, here is a comparison between my S4 and my Golf TDI diesel. :-X

<img src="http://www.nogaroblue.com/VAG/s4vsgolf.jpg">

The actual plot for my Golf is very very close to what people have been getting on actual dynos.

<img src="http://www.nogaroblue.com/golf/tdihp.jpg">

Mark.core

Your 0-60s don't look accurate. What am I missing? Were they normal launches?

VerrÜckt

The other graphs were basically 2nd gear pulls. That would mean I would ease off the line, shift into 2nd at about 3000 rpm, and go WOT all the way though 2nd.

The 0-60 times were accurate, I just wasn't going for a fast 0-60 time. ;-)

Bauer

over 4000lbs..doesn't that seem a little high? thats as much as my RS6

VerrÜckt

Driver = 240 lbs and passenger = 180 lbs. My car is stock weight wise (est 3640 lbs).

PSmalls::DoggieStyle

Nice, Chris. I had fun testing it in my car with you

2000s4biturbo::Uli

ive been toying with the idea of getting one. im assuming you like it?

VerrÜckt

I think so. It's especially fun to ***** it out to your friends too.

rktskicar

Interested in DocSlow's .gtp's as well since I have a stage 2+. I have a Gtech Pro Comp and it is great!

Bruce