DR issues
Thread Starter
Drifting
Joined: Mar 2006
Posts: 1,872
Likes: 7
From: Richmond VA
DR issues
BFG DRs on the vette in my sig. I cannot get traction to save me! Went to the track Friday night and it was chilly (low 60s to 50s), but I didn't hear many complain of slippery conditions.
I'm used to spinning in 1st, but I attribute that to my lack of experience launching a 6spd. Fri, I was spinning badly in 2nd and in 3rd (80+mph) when the boost kicked in.
Here is what I did. Rolled through the water, spun tires in 2nd gear for apx. 2-3 seconds, then launched at around 1600 - 1800rpm - feathering the clutch a bit. I didn't spin terribly when I went to 2nd or 3rd, but as soon as the boost kicked in, the tires broke loose.
I tried going around the water, but same result.
The tires have about 5k miles on the road and three trips to the strip. There is still about 1/4" of tread on them.
Any thoughts? Longer burnouts? Tires have gotten too hard?
edit: I've tried 16 - 20psi. Friday was 16psi
I'm used to spinning in 1st, but I attribute that to my lack of experience launching a 6spd. Fri, I was spinning badly in 2nd and in 3rd (80+mph) when the boost kicked in.
Here is what I did. Rolled through the water, spun tires in 2nd gear for apx. 2-3 seconds, then launched at around 1600 - 1800rpm - feathering the clutch a bit. I didn't spin terribly when I went to 2nd or 3rd, but as soon as the boost kicked in, the tires broke loose.
I tried going around the water, but same result.
The tires have about 5k miles on the road and three trips to the strip. There is still about 1/4" of tread on them.
Any thoughts? Longer burnouts? Tires have gotten too hard?
edit: I've tried 16 - 20psi. Friday was 16psi
Last edited by clemsondave; Oct 15, 2006 at 10:28 AM.
Race Director
Joined: Oct 1999
Posts: 17,700
Likes: 1,205
From: Phila PA, Bonita Springs FL
I don't think with your kind of power, dr's are gonna make it..
Dr's are probably good for up to 425-450 RWHP..
Beyond that, you're just gonna roast em, especially w/ OVER 500 RWHP.
Probably need slicks to hook..
Dr's are probably good for up to 425-450 RWHP..
Beyond that, you're just gonna roast em, especially w/ OVER 500 RWHP.
Probably need slicks to hook..
Race Director
Joined: Aug 2000
Posts: 10,649
Likes: 31
From: Central Florida
Yo-el is likely correct. But before you change tires, I'd suggest adjusting the burnout procedure to make certain the tires are properly heated. With the BFG DRs, I try to make good smoke with both tires. The right side smokes first. So I watch the driver side to judge when the smoke is good enough.
Here's my best shot at the moving parts and vid of a burnout without a line lock.
With properly heated tires, if you still spin on the shifts, you will need to be judicious on the speed of the shifts and the throttle position on each on...or switch to ET Street bias-bly rears.
Also, the experiments I've done with BFG 315s showed that at psi lower than 18, the tread begins to cup, reducing the contact patch.
So I'd suggest going to 18 psi and ensuring the tires are properly heated and check the results again.
Ranger
Here's my best shot at the moving parts and vid of a burnout without a line lock.
With properly heated tires, if you still spin on the shifts, you will need to be judicious on the speed of the shifts and the throttle position on each on...or switch to ET Street bias-bly rears.
Also, the experiments I've done with BFG 315s showed that at psi lower than 18, the tread begins to cup, reducing the contact patch.
So I'd suggest going to 18 psi and ensuring the tires are properly heated and check the results again.
Ranger
Thread Starter
Drifting
Joined: Mar 2006
Posts: 1,872
Likes: 7
From: Richmond VA
Thanks for the tips. I'll give a longer burnout a shot with 18psi.
I'm going to Dinwiddie on Friday. NHRA is there this weekend, so no track excuses this time.
One race last friday night, I trapped 126. Same as the guy next to me. My ET 12.05, his 10.90.
He had an auto trans with slicks.
I'm going to Dinwiddie on Friday. NHRA is there this weekend, so no track excuses this time.
One race last friday night, I trapped 126. Same as the guy next to me. My ET 12.05, his 10.90.
He had an auto trans with slicks.
Le Mans Master
Joined: Nov 2003
Posts: 8,308
Likes: 157
From: NJ
Originally Posted by clemsondave
Thanks for the tips. I'll give a longer burnout a shot with 18psi.
I'm going to Dinwiddie on Friday. NHRA is there this weekend, so no track excuses this time.
One race last friday night, I trapped 126. Same as the guy next to me. My ET 12.05, his 10.90. He had an auto trans with slicks.
I'm going to Dinwiddie on Friday. NHRA is there this weekend, so no track excuses this time.
One race last friday night, I trapped 126. Same as the guy next to me. My ET 12.05, his 10.90.
He had an auto trans with slicks.
Drifting
Joined: Dec 2005
Posts: 1,973
Likes: 5
From: Valrico Florida
Try some of the drag racing street car sites. There are street outlaw radial tire cars out there running insane amounts of power.
Previous word was that the BFG was best just before it was worn out and with minimum tread.
Previous word was that the BFG was best just before it was worn out and with minimum tread.
