[Subscribe to Daily Digest] |
Members do not see ads below this line. - Help Keep This Site Online - Signup
Mrs. Santa was very good to me this year and my two car gifts were the captioned and a Passport 8500 X-50. I got the G-Tech up and running and took it out on Christmas evening (27 degrees F and on an empty flat road).
My impressions are as follows:
1. VERY easy to set-up. All you need to do is input the vehicle's redline and weight (with you in it, of course) and then confirm the rpm monitor is accurate by revving the car a few times and hitting the "OK" button. I set the redline at 6,000 and the weight as 3,400.
2. Mounting it is very easy with the suction cup mount and the 12V cigarette cord.
3. After reading the manual (20 minutes), I took the car out and solely used the "Drag Strip Mode". This allows for 0-60, 1/4 mile, HP/TQ, 60-0, etc... as opposed to "Road Racig Mode" which allows you to record up to an hour of racing (20 samples/second) and shows you various pictorials of lateral g's & rpms at given points on the track.
4. After the runs, I reviewed them on the unit and then uploaded them to my laptop via serial cable (about 2 minutes). The software allows you to view various runs and compare them. You can analyze a number of different things from any given run including acceleration, HP/TQ, HP v. time, RPMs, Speed v. time, G's v. time, Distance & braking. Very cool!
5. In terms of HP/TQ, please note that it measures net HP in lieu of HP at the wheels or at the crank. Therefore, it takes into account aerodynamic drag and rolling resistance which will obviously produce lower numbers than if you were on the dyno. Also, there are separate methodologies for running accelerration tests v. HP/TQ: acceleration is self-explanatory while HP/TQ is done by a decent launch in 1st, short-shift to 2nd, and then a long run in 2nd. The rationale for using 2nd is that that drag increases substantially in higher gears so a lower gear gives a closer approximation to HP/TQ at the wheels.
In terms of performance, please see the chart below and I will post an additional chart with HP/TQ. Long story short, my best 0-60 was 5.9 seconds (on 15" snow tires!) and my best 1/4 mile was 14.520 and my best 1/4 mile trap speed was almost 102. Not bad considering wheelspin in 1st required a fairly early shift to 2nd.
As respects HP/TQ, my best run was 220HP/266TQ which using a 13% drivetrain/drag loss factor (remember, these numbers are reflective of drag and not just drivetrain losses), this gives me an estimated 253HP/306TQ. The HP number seems right but the TQ # does seem a little high (I'm going to do some DynoJet runs for comparison next month). Regardless, the car goes like stink!
Overall, a fantastic little device and I look forward to doing some more runs to try and get some more consistent numbers.
Happy Holidays and have a very Happy New Year!
Regards,
Derek
2002 9-3 Convertible w/sport package & a whole lot more!
posted by 205.156.184...
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
 |
 |
 |
 |
 |
