How fast have you gone on street tires
08-10-2009, 10:43 AM
#1
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How fast have you gone on street tires I have a 2001 Pontiac Trans am with a built 402, by no means am I a once a week drag racer, I go about once a year but I wanted to see what it could do the other day and the car is a six speed, so I went out and ran a 1.911 60ft on 315x30x18 Michelin pilot sports 2 I ran a 12.0 with a 130 trap speed I know it has low elevens in it but, I need more practice and I hadn't gone for a year before that and when I went it was a auto and then I converted it to a six speed. I have koni single adjustables which work okay in the back but for the front no so good as you can only adjust the compression not the the rebound so the front doesn't come up the way it use to with the stock suspension. Also I have my pinion angle is set at -1 degree.I did a pretty good bunout in 2nd gear and I ran out of time I progressivly got better but kept bogging trying to launch at 3000 I guess may be i needed to rev higher. I don't want to spend the money on a full drag wheel tire setup, so I wanted to see what people were running on just radials, these pilots have a soft sidewall for a normal street tire, I dropped them down to 24 psi should I have gone lower? i didn't know on street tires and I know I might be forgeting something just let me know Any help would be appreciated
08-10-2009, 10:59 AM
#2
What I can say is for a 6 speed 402 car, the ONLY tire that has a chance of hooking is a M/T ET Drag Radial. Even then some work will be needed.
IMO I would not worry about ET's if your going once a year. IF you care about getting toasted by a cam only street car, then I would spend the liittle extra needed $$$$.
Becuase it is a 6-speed now all those suspension requirements have now changed compared to an Auto so unfortunately if you want it to run an low 11, you need to spend $$$.
FYI with an auto, properly stalled, geared, and good tires, it can do 10's
IMO I would not worry about ET's if your going once a year. IF you care about getting toasted by a cam only street car, then I would spend the liittle extra needed $$$$.
Becuase it is a 6-speed now all those suspension requirements have now changed compared to an Auto so unfortunately if you want it to run an low 11, you need to spend $$$.
FYI with an auto, properly stalled, geared, and good tires, it can do 10's
08-10-2009, 11:07 AM
#3
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I know the m/t would be a good choice I will probably get some some time in the future. I guess I will need to go back to the track and mess with it a little more what about psi on the street tires burnout etc.
08-10-2009, 11:18 AM
#4
I have taken my 383 out on Falkens which measured 245/50-16 and managed a 12.2 and that was a LT1 car, by no means is it fast but I managed that on a real world radial. I put max PSI in the front tires and rears down to 23 and it went.
But I will let other people chime in, as I do not think any tweaking is going to get it to run an reasonable ET given the combo.
08-10-2009, 12:44 PM
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Just buy some 16" take off wheels and a set of drag radials. Hooking up on street radials is a hit or miss deal. I've gone 11.2's on BFG KDW's. Droping air pressure on a radial causes it to cup in the middle,thus your contact patch gets even smaller. You are only running on the inner and outter sides of the tire when you do this. If you built a full drag racing suspension and made stock or a little more HP you might be able to hook up on street tires. A water burn out is something you shouldn't due with street tires or really drag radials. Just heat them up a little once you get past the water box. Leave off idle when the car starts to move roll into the throttle.
08-10-2009, 01:54 PM
#6
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I would totally go for the take offs and some slicks but i'm running c6 zo6 rotors and brakes all the way around and the rear is narrowed 3 inches on each side. So custom wheels are the only way to put slicks unless I put the 315/30/18 mt drag radials on the wheels I have on the car but I don't know how much of a difference it will make since the sidewall would still be the same, just sticker. Like I said I tried launching it a 3000 and it boged and tookoff so I know the are biting a little bit. But I agree with it being hit and miss with street radials, so you think just dip them in the water and then do a burn out.
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08-10-2009, 06:17 PM
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i've went 7.20's on a 275/60 steel belted street true radial... at one time we had a local class for it.... one of my friends went 6.6x in the 8th.... these are stock suspension race cars...
they eventually shut the class down....
they eventually shut the class down....
08-10-2009, 06:51 PM
#11
I just went 10.77 on real street tires this weekend on
REAL street tires....315/35/17 Nitto 555 (not 555R which is a Drag radial) at stock air pressure
9psi of boost
60' 1.86
1/8 7.14 @ 105
1/4 10.77 @ 136
DA was 3041 which was not too bad since it was 95 degrees.
Check this...raceweight was 4095#
I think I can get a 10.5x out of it. I think I am more excited about this than the 9.59s on slicks.
SD- standard definition
HD- high definition (FAST computer)
SD http://mssftw.com/videos/SD-10-77-streettires.wmv
HD http://mssftw.com/videos/HD-10-77-streettires.wmv
REAL street tires....315/35/17 Nitto 555 (not 555R which is a Drag radial) at stock air pressure
9psi of boost
60' 1.86
1/8 7.14 @ 105
1/4 10.77 @ 136
DA was 3041 which was not too bad since it was 95 degrees.
Check this...raceweight was 4095#
I think I can get a 10.5x out of it. I think I am more excited about this than the 9.59s on slicks.
SD- standard definition
HD- high definition (FAST computer)
SD http://mssftw.com/videos/SD-10-77-streettires.wmv
HD http://mssftw.com/videos/HD-10-77-streettires.wmv
talk about hefty.
08-11-2009, 06:45 AM
#15
I just went 10.77 on real street tires this weekend on
REAL street tires....315/35/17 Nitto 555 (not 555R which is a Drag radial) at stock air pressure
9psi of boost
60' 1.86
1/8 7.14 @ 105
1/4 10.77 @ 136
DA was 3041 which was not too bad since it was 95 degrees.
Check this...raceweight was 4095#
I think I can get a 10.5x out of it. I think I am more excited about this than the 9.59s on slicks.
SD- standard definition
HD- high definition (FAST computer)
SD http://mssftw.com/videos/SD-10-77-streettires.wmv
HD http://mssftw.com/videos/HD-10-77-streettires.wmv
REAL street tires....315/35/17 Nitto 555 (not 555R which is a Drag radial) at stock air pressure
9psi of boost
60' 1.86
1/8 7.14 @ 105
1/4 10.77 @ 136
DA was 3041 which was not too bad since it was 95 degrees.
Check this...raceweight was 4095#
I think I can get a 10.5x out of it. I think I am more excited about this than the 9.59s on slicks.
SD- standard definition
HD- high definition (FAST computer)
SD http://mssftw.com/videos/SD-10-77-streettires.wmv
HD http://mssftw.com/videos/HD-10-77-streettires.wmv
The only thing keeping your car from looking like his is the auto and 3.08 gears and weak stall.
Plain and simple, stick cars need a bias ply and I would NOT be happy with high 11's, maybe 11.10's or quicker.
08-11-2009, 10:01 PM
#18
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you guys will be happy to know I just went ahead and got a set of 315/30/18 mt drag radial I figure since I mostly do street driving it will be a perfect mix, and I won't have to spend the money on a dedicated set of wheels and tires i will only use twice a year. so what are your guys predictions et and trap speeds, 60 fts
08-12-2009, 08:17 PM
#19
Boost cars are different from big cube N/A cars that ride on a stick, and your 60 foot explains that, thats a soft launch and you roll in and the power carries you through. Congratz on the time but for comparision to the OP, there is no comparision.
The only thing keeping your car from looking like his is the auto and 3.08 gears and weak stall.
Plain and simple, stick cars need a bias ply and I would NOT be happy with high 11's, maybe 11.10's or quicker.
The only thing keeping your car from looking like his is the auto and 3.08 gears and weak stall.
Plain and simple, stick cars need a bias ply and I would NOT be happy with high 11's, maybe 11.10's or quicker.
Its not about how much power but how much you can put down
08-12-2009, 10:21 PM
#20
you guys will be happy to know i just went ahead and got a set of 315/30/18 mt drag radial i figure since i mostly do street driving it will be a perfect mix, and i won't have to spend the money on a dedicated set of wheels and tires i will only use twice a year. So what are your guys predictions et and trap speeds, 60 fts