i was wondering if anyone used a G-Tech and what kind of numbers were they getting? I was runnning mines and got some very good number last night. I was wondering if it was very accurate. Any help would do.
Thanks

 

Hubbard - I've run my G-Tech simultaneously while making some runs down the quartermile track in Baton Rouge & I've found the times to be slightly more optimistic in terms of times & mph. However, if ya use it not as an "absolute" timing tool but instead just to chart performance figures whenever U make modifications it's an excellent piece of electronics. Also keeps ya from having to wait for the local "test 'n tune" night at the strip.
BTW - my best quartermile run was an actual 13.79 @ 106.2 ( that's with the track's timers ). The G-tech showed 13.68 @ 16.7 on the same run. Close enough for me!!

 

Mean Gene, it's impressive to see that you are running stock Supra TT auto times in the quarter without any forced induction. Nice job on the mods. What do have about 330 hp at the crank?

 

JAC - After all the engine mods ( which R only the SRT intake/ECU & the Borlas ), the best dyno test showed 274.1 HP at the rear wheels & we used 80% for the drivetrain efficiency figure & ended up with roughly 342.6 flywheel HP. I've seen 75% used before but the baseline runs yielded 248 rearwheel HP & if the factory numbers of 300 HP R to be believed, then 80% is closer to the correct percentage. I know that 248/.8 results in 310 HP but I think maybe I got a slightly stronger engine in mine - hope so!! It was a cool ( for Louisiana, anyway ) day of 60 degrees & relatively low humidity & the best results came on the first runs ( as to be expected although I let the car cool off between runs ). FWIW - I changed to the Borlas after 2 baseline runs & they showed an increase of almost 7 rearwheel HP so Borlas claims of 5-10 engine HP should be considered valid ( this 7 HP should show almost 9 flywheel using the aforementioned 80%. The addition of the SRT induction was worth the balance of the power gains &, again, should validify SRT's claims of 20-30 engine HP ( at least in MY case ). The rest of the performance gains came from maximizing what power I had via the 2800 rpm stall Dragon T/C & the Supra 3.76 geared LSD. Other tricks I used was lowering my rear tire pressures ( ran 18" wheel/tire combo ) &, as I've run for many years at State Capital Dragway, I had a kind of a "home field" advantage!! Next step on the dyno will be TorqueMaster spark plugs ( on Percy's recommendation ) maybe in early summer. THIS time I'll try to remember to print out & KEEP the dyno sheets for posting.

 

Gene, I'm gettin 330hp with a 15% drivetrain loss equaling 281 RWHP. Now with a 20% drivetrain loss I'm getting 351 hp at the flywheel
JAC

 

Hubbard - What times you get ? The best i got was 15.4 if i recall . What mods have you done ? Been awhile since i've been on so excuse me for asking .

After i make the switch to srt's race ecu maybe we can meet up to dyno both of our cars to compare . Wynne speed is only 30 min from vicksburg and 1hr from Hattiesburg .

 

JAC - R U refering to my GS or your Supra? Unless I'm suffering from ANOTHER senior moment ( OK, Percy - NO comments!!:eek: ), 274.1/.8 equals 342.6. Of course, this wouldn't be the first ( or last ) time that my math stunk - & I'm an engineer!!

 

Gene, I'm referring to my supra

 

Gene, I should have been a little more specific with my post now this is getting pretty confusing . My car has 330 hp at the crank with a 15% loss I am getting 281rwhp. With a 20% loss my car has 351 hp at the crank (not 342) .

 

[QUOTE]Originally posted by Mean Gene
[B]JAC - I know that 248/.8 results in 310 HP but I think maybe I got a slightly stronger engine in mine - hope so!!

Gene, I wouldn't be surprised if your car started out with 310hp at the crank stock I know my car dynoed at around 328hp at crank stock versus the 320 advertised . It appears as Toyota was conservative in thier hp ratings for these two engines vs. other carmakers that overrate thier engines(i.e. Ford's mustang cobra pre 02' or 01' .