RX VIPER Posted August 27, 2005 Share Posted August 27, 2005 Took my 2000 GS400 to the track for the 1st time last week. I've got 69k miles on the car and my mods include: Borla exhaust, SRT intake and ECU. I made 4 passes and I was 14.9 and 15.0 at 94mph each time. I tried manually shifting and the auto. 60 foot times were consistant at 2.60. I'm pretty disappointed with those times. I was hoping low 14's at least. It was very hot outside; 94 degrees. Do you think it was the high temp outside, or could something be wrong with the intall on my race ECU? Other options? I'm no stranger to the track. The other car in pic has gone mid 10's. I'm about ready to put a s/c on the GS. :smirk: Quote Link to comment Share on other sites More sharing options...
Abear Posted August 27, 2005 Share Posted August 27, 2005 im pretty sure that stock GS400's we're makin like 14.3 or 14.4 stock, so i think somethins wrong with your setup. and when u went to the track, did you take out your spare and backseat and all the goodies along those line? Did you power break it, get your stall up there? Of course i dont know too much of what im talkin about, but it could be something wrong with the ECU. Maybe someone with a GS400 will enlighten us more. Quote Link to comment Share on other sites More sharing options...
91L3xus Posted August 27, 2005 Share Posted August 27, 2005 Maybe has to do with your larger wheels? They look like a larger diamater than stocks, and when rolling resistance is increased, performance might suffer. Quote Link to comment Share on other sites More sharing options...
SW03ES Posted August 28, 2005 Share Posted August 28, 2005 Stock GS400s will run 14.7, 14.8 in the 1/4. The larger and heavier wheels are what has slowed you down. Quote Link to comment Share on other sites More sharing options...
RX VIPER Posted August 31, 2005 Author Share Posted August 31, 2005 I did try to break torque off the line. I hadn't thought about the heavier wheels/tires issue, but I don't think it would cost me 3/4 of a second or more. Besides taking it to a dyno, any other way to test if ECU not set properly? Quote Link to comment Share on other sites More sharing options...
cruznroadking Posted August 31, 2005 Share Posted August 31, 2005 What kind of tires are you running? How are you coming of the line? Do you get any wheel spin. Having the right tires will make a big difference. Also how are your reaction times? What is the stall speed off the line? I usually determine the highest stall speed I can launch the at car before the tires break loose. LOL Quote Link to comment Share on other sites More sharing options...
Wicked_Lex Posted September 18, 2005 Share Posted September 18, 2005 Took my 2000 GS400 to the track for the 1st time last week. I've got 69k miles on the car and my mods include: Borla exhaust, SRT intake and ECU. I made 4 passes and I was 14.9 and 15.0 at 94mph each time. I tried manually shifting and the auto. 60 foot times were consistant at 2.60. I'm pretty disappointed with those times. I was hoping low 14's at least. It was very hot outside; 94 degrees. Do you think it was the high temp outside, or could something be wrong with the intall on my race ECU? Other options? I'm no stranger to the track. The other car in pic has gone mid 10's. I'm about ready to put a s/c on the GS. :smirk: The 14.2 ET quoted in the specs about the GS400 was probably done by a pro under ideal circumstances. Did you take the RPMs to or near redline (6400 RPMs) before shifting? Also have you ever tuned the engine? You might still have original plugs and wires. Performance degrades as these parts age. Quote Link to comment Share on other sites More sharing options...
RX VIPER Posted September 18, 2005 Author Share Posted September 18, 2005 Yes. Car has had recent tune. I'm going back in a few weeks when the temps will be in the 70's. I'll also try a pass with the stock ECU. The car looks and sounds so good. Must.. go.. faster...!!! :D Quote Link to comment Share on other sites More sharing options...
owali1 Posted September 22, 2005 Share Posted September 22, 2005 Does anyone know what a 2000 GS300 would pull in the 1/4? Quote Link to comment Share on other sites More sharing options...
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