Mallard Posted August 6, 2005 Report Share Posted August 6, 2005 Today a friend of mine and I went out with a Escort Passport GT2 G-Timer to see what my car could do. He has a ~400hp 1G DSM that put down 1G lateral, 1G Braking, and 0.84 Acceleration G's. I know I have no chance of matching his acceleration g's, but I was fairly confident I could pull 1G laterally. The Car: 2003.5 MazdaSpeed Protege AWR Coilovers Modified ploy swaybar bushings Falken Azenis (215/45/16) 16" Rota Slipstreams We were both running the same tires (but he has 225/17's), my car weighs 2760 with no passengers, and my CG is lower then the DSM's. We used an empty parking lot as our makeshift skidpad and mapped a traction circle. It appeared as if I could make 1G, but the lot was really bumpy and we thought that might be inflating the accelerometers numbers. Traction Circle So we drive around various on/off ramps waiting to find one that was perfectly clear with a near constant radius. After easing through a few I was feeling more confident going into the next one. I entered the curve fast and continued to accelerate until the car started to push and the tires were audible. From my traction circle measurements it appeared as if my limit was about 1.04 lateral G's. Going through this curve the accelerometer was peaking at 1.04 with an average at about 1g for about 2 seconds straight. Lateral Acceleration I actually hit 1.05 G's on the highest peak but that's the limit of adhesion. *Disclaimer: All roads were scouted out before hand and were clear. There was no traffic nearby, no boxes of kittens, no kids on bikes, etc. I am a trained professional. Do not try this at home. Quote Link to comment Share on other sites More sharing options...
controler Posted August 6, 2005 Report Share Posted August 6, 2005 It doesn't suprize me that much that you could pull those numbers in a one-time instance. To truely test the cornering performance the results must be repeatable and done on both turning left and turning right. At least thats how the magazines do it. Quote Link to comment Share on other sites More sharing options...
Mallard Posted August 7, 2005 Author Report Share Posted August 7, 2005 I did the traction circle in both directions and came up with 1.04 g in both directions. Sadly, most entrance/exit ramps are right handers so I could not run that backwards. Although they are close to constant radius and I can hold a sustained speed around them. When we do testing at work we hold a constant radius and drive faster until the car understeers past a certain point. Then we can look at the data trace and see what the max lateral accel is. Essentially that's what I did except I only had a 270 degree circle to test on so I had to keep repeating it until max speed was reached. You talk like I slolomed the car to hit this number for an instant. But in reality this was a sustained G for around 2 seconds of duration. The car was stable and it could have been held longer if I had a continuous circle. Sadly, my car can't get into any of the test facilities I have access to so I'll continue looking for a better surface for further tests. Quote Link to comment Share on other sites More sharing options...
Guest turboteg2nv Posted August 7, 2005 Report Share Posted August 7, 2005 Those G-Timers can be fun, and suprisingly accurate. Good stuff! Quote Link to comment Share on other sites More sharing options...
thorne Posted August 7, 2005 Report Share Posted August 7, 2005 I would to take my stang out and see what i can do once it running. I'm running a Modified suspension . And it seems to hang on really flat until i run out of rubber hang on power Quote Link to comment Share on other sites More sharing options...
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