this is what we need to fill in ...... can anybody help fill this out?

 

DOWNLOAD THE SPEEDTRACER USER GUIDE

weight:

2919 lb - 1999 c2
2966 lb - 2002 c2
3241 lb - 2002 c4s

frontal area:
2 sq meters
21.52 sq ft

drag coefficent:
Cd = 0.30

tire circumference:
go to tire rack, find your tire and look up it's specs.
circumference = π x diameter eg., 3.14159 x 26" = 81.68" circumference.

gear ratio variables and gear ratios:

working gear = the gear in which you intend to do the HP test (just like a dyno run), eg., 3rd gear run = 1.52
rear end ratio = i think this is final drive = 3.44
gear ratio = hit the compute button.

environmental variables:
weather.com

 

After results:

The sound is bit more aggressive. More of a growl, not a real noticable change but it's there.

Seat of the pants performance is about the same as the sound. Not much change but it's there. Where I used to feel an increase in pull around 4k rpm, that has flattened out some. The increase in pull is noticable at 5k rpm. It seams to come on pretty strong. Down shifts are more rewarding than b4.

Now what you number people want to see. The after results from the software. +5 HP and +3 torque at the limiter.

I couldn't do the timed runs tonight.

 

Just did my fabspeed g timer tests, they are way too good to be true, I'll repeat 'em and post all.

 

Chris, you're going to make me way too envious. I can see you sneering and gloating from here.

 

It was too radically different from baseline( I think the gtimer set itself back to default), have to throw 'em out, statistically, outliers mean nothing. I'm gonna try again tomorrow, weather permitting. No BS here.

 

what about the butt dyno?? ... perception still counts for something.

 

why don't you just put it on an all wheel dyno. there has to be one in your area.

 

What a shame you will have to do it all over again

 

The butt dyno says about 20hp, but that's my butt. As far a awd chassis dyno, no thanks on a 90k car, I personally know of 3 TT's whose awds' were 'injured' on awd dynos, besides it's not that important to me.

 

oh well. butt dyno's are worthless. guess we'll never know

 

did my info help you out? did you do any timed runs?

 

not yet. been working too much. i hope to soon though.