I was able to finally find a sweet spot in the handling allowing me to push the car pretty hard. I won XP by 5.5 seconds! This event was about the best I have ever run and I have much more confidence in the car.
Here is a video of my best run of the day which was the 6th fastest overall.
__________________
Mike
FFR Coupe #340, 2003 LS1 350 RWHP, TKO 500, QT BH, Champ 10 QT pan, 5 Lug and AC, Cobra Disc, SAI mod, Kumho XS 315's x4 ..Licensed for 28k..Just over 30k w/race tires and many mods http://s464.photobucket.com/albums/rr2/mmarshall01/ http://www.youtube.com/watch?v=uHtx7...1&feature=plcp
Build started - 8 Apr 2008
1st Autocross - 18 Oct. 2009 XP Class
2011 and 2012 St Louis region XP Champion
Last edited by mmarshall; 10-02-2012 at 12:47 PM..
__________________
The Bopp Shop
Coupe # 031 with 422" Windsor by Southern Automotive (dash autographed by Peter Brock)
Mk III # 5021 (SOLD)
Unique 427 Roadster with 482"FE by Southern Automotive
Great job! I was holding down a chair in the crew lounge at Business Jet Center in oakland today on standby.
JC
JC I have not been to OAK in ages. We normally go to Kaiser which is not very nice. I am just getting over a stomach virus that had me pucking my guts out just 6 hours after the race was over. Enjoy the tour and fly safe.
__________________
Mike
FFR Coupe #340, 2003 LS1 350 RWHP, TKO 500, QT BH, Champ 10 QT pan, 5 Lug and AC, Cobra Disc, SAI mod, Kumho XS 315's x4 ..Licensed for 28k..Just over 30k w/race tires and many mods http://s464.photobucket.com/albums/rr2/mmarshall01/ http://www.youtube.com/watch?v=uHtx7...1&feature=plcp
Build started - 8 Apr 2008
1st Autocross - 18 Oct. 2009 XP Class
2011 and 2012 St Louis region XP Champion
__________________
FFR 4859GT 414W, Tremec TKO 5spd. IRS w/3.55 and Torsen diff. 13" dual-piston front & 12" rear disc brakes. 03 Cobra wheels, 275/40 & 315/35 tires. Possibly the only person in the world that is currently building a Spyder GT.
"A veteran - whether active duty, retired, national guard, or reserve - is someone who, at one point in his or her life, wrote a blank check made payable to The 'United States of America', for an amount of 'up to and including my life.'"
The camera is mounted centered in the radiator inlet. It really gives the perspective of speed and shows clearance from the cones on both sides. The view from the windshield does a better job of showing the layout of the course.
__________________
Mike
FFR Coupe #340, 2003 LS1 350 RWHP, TKO 500, QT BH, Champ 10 QT pan, 5 Lug and AC, Cobra Disc, SAI mod, Kumho XS 315's x4 ..Licensed for 28k..Just over 30k w/race tires and many mods http://s464.photobucket.com/albums/rr2/mmarshall01/ http://www.youtube.com/watch?v=uHtx7...1&feature=plcp
Build started - 8 Apr 2008
1st Autocross - 18 Oct. 2009 XP Class
2011 and 2012 St Louis region XP Champion
__________________
Mike
FFR Coupe #340, 2003 LS1 350 RWHP, TKO 500, QT BH, Champ 10 QT pan, 5 Lug and AC, Cobra Disc, SAI mod, Kumho XS 315's x4 ..Licensed for 28k..Just over 30k w/race tires and many mods http://s464.photobucket.com/albums/rr2/mmarshall01/ http://www.youtube.com/watch?v=uHtx7...1&feature=plcp
Build started - 8 Apr 2008
1st Autocross - 18 Oct. 2009 XP Class
2011 and 2012 St Louis region XP Champion
Very nice. Good job. That LS like to spin up fast doesn't it!
Yes it does rev very quickly. The downside is when traction is low like on street tires they spin very easily and the engine goes right to the rev limiter. Even in the video I posted the car was spinning the tires across the finish line at nearly 70 mph. I find it amazing that it can break loose hot sticky slicks at that speed.
__________________
Mike
FFR Coupe #340, 2003 LS1 350 RWHP, TKO 500, QT BH, Champ 10 QT pan, 5 Lug and AC, Cobra Disc, SAI mod, Kumho XS 315's x4 ..Licensed for 28k..Just over 30k w/race tires and many mods http://s464.photobucket.com/albums/rr2/mmarshall01/ http://www.youtube.com/watch?v=uHtx7...1&feature=plcp
Build started - 8 Apr 2008
1st Autocross - 18 Oct. 2009 XP Class
2011 and 2012 St Louis region XP Champion
Are you sure it's the tires spinning and not the clutch slipping? 350 RWHP is alot of power (over 400 FWHP) but the coupes are heavier then the roadsters and the Kumhos are pretty sticky. Should be hooking up ok. What rear gear are you using? Maybe too high? HP doesn't usually spin the tires as easy as torque does. You may have to change the gear to address the torque. What tire pressure are you running? Maybe go down a little? Awesome car btw. Love the grunt it makes! What gear @ 70 mph? still 2nd?
No it is not the clutch as the back steps out some at the same time. On the Hankook R-comps managing the power is pretty easy most of the time. I run 3.55's which is perfect for my local events (all in 2nd gear). As I and the car get better I will need to turn up the limiter some for some of the faster courses. I hope to avoid going to 3.27's as that would cost me time out of some of the slower corners. Last month I built my own gas pedal to change the ratio. I went from 1.5" of throw to 4" of throw. This new pedal is really helping me to dial in just the right amout of throttle and keep from unsettling the car with giant stabs of power. I have been from 18 - 32 PSI and the Hankooks like 27 psi cold and 29 psi warm.
Traction is a minor issue compared to balance. I can now tell the difference in balance with the varying fuel load. A couple of events ago I was too lazy to empty the tank and tried racing with 1/2 tank of gas. The balance was terrible and my times were very slow. It almost cost me a win! On Sunday we started with 1/4 tank and balance was much better. On my last 2 runs the gage read 1/8 tank and the balance was the best I had ever seen. Amazing how much an extra 30 lbs in the rear of the car changes things.
BTW in race trim my Coupe weighs in at 2260 lbs, so it is about the same as most roadsters.
__________________
Mike
FFR Coupe #340, 2003 LS1 350 RWHP, TKO 500, QT BH, Champ 10 QT pan, 5 Lug and AC, Cobra Disc, SAI mod, Kumho XS 315's x4 ..Licensed for 28k..Just over 30k w/race tires and many mods http://s464.photobucket.com/albums/rr2/mmarshall01/ http://www.youtube.com/watch?v=uHtx7...1&feature=plcp
Build started - 8 Apr 2008
1st Autocross - 18 Oct. 2009 XP Class
2011 and 2012 St Louis region XP Champion
Last edited by mmarshall; 10-04-2012 at 05:07 PM..
Wow that's light for the coupes. 3:55 is a great gear and obviously is working well. I had a coupe and changing to a slower rack with power steering made a huge difference in the car's manners. I never got to autox it though. I ran Hankooks on my F150 S/C 2003 Lightning and it was the only tire that could handle that truck. Great tire. Good luck with the car.
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