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09-26-2008, 06:11 PM #1
Manual Tranny & Radials - racing suggestions?
Thursday I'm making my first trip to the drag strip with a manual. I've been several times in years past with an automatic, and I'm a bit concerned about a few things with the manual setup.
Tires will be some daily used 315 Sumitiomos Radials (315/35/17s) with not much thread on them. They break loose pretty easy on the street (when traction control is off) without too much effort.
Car is ~ 360-375 RWHP
1.) How exactly do I spin the tires after the water box to clean off the tires? Do I Drop the clutch in 1st, switch my left foot to the brake, and hold the gas down for a second? Or should I just give it gas, dump the clutch some, spin the tires a few rotations and push in the clutch and coast to the line?
2.) What tire pressure should I start out with? What has worked for other ppl w/ radials? I'm thinking in the 25-32 psi level for the rears?
3.) What the best launch technique? I'm guessing start at 2000 RPM and work my way up until I get too much tire spin?
4.) Feather the clutch off the line to help eliminate tire spin?
5.) What RPM has everyone gotten their best 60' time on radials? I'm guessing the RPM isn't too high.
6.) Turn off traction control?
Thanks in advance to those that respond!
Also, if you have anything else to add, please do so.
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09-27-2008, 07:14 AM #2
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09-27-2008, 03:35 PM #3
- Join Date
- Mar 2007
- Location
- Gainesville, VA
- Posts
- 654
Drive around the water box if you can. Don't over heat street tires just spin them quick to get any crap off of them. I found mid 20s in the rears are good just make sure you have someway to get air back in them. 2/2500 and feathering the clutch to eliminate as much wheel spin as possible but you don't want to bog the car either. Yes turn off traction control.
Going to be tough to get 370rwhp on crappy radials to hook. Good luck.
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