Bad Day In The 1/8th

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Old 04-14-2008, 08:36 PM
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Default Bad Day In The 1/8th

Well I went to try out my new set up at the track yesterday. The car should run low 7s N/A IMO. I have all my mods in signature and a Moser 9" with 4.33s. The car pulls extremely hard. I was on newer M/T drag radials and started out with 18 psi and lowered them all the way down to 5 psi! I know your not supposed to go that low but it wouldnt hook. It was blowing the tires off through 3rd. It went 8.4x at 9x.xx with 2.30s 60 ft. Any suggestions?
Old 04-14-2008, 09:18 PM
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Sounds like maybe the track prep sucked. I run MT 325/50/15s on my Purple car and it usually worked best between 14psi and 16psi. Some have had good luck running 20- 22psi on 28"(325/50) and 30"(295/60/15) MT Radials but all the fast radial cars(7.5- 8.3 sec) run 14 to 16psi. If your running a smaller MT tire say a 275/40/17 or 255/50/16 they require more pressure because they have no sidewall usually between 18psi to 24psi. I've never heard of anyone running less then 10psi on MT radials.
Old 04-14-2008, 10:08 PM
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the track doesn't take kindly to homos.

next time out, i'll hide in the hatch!
Old 04-15-2008, 06:53 PM
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What's goin on man, you really were going through those tires like nothin. Poor tires never stood a chance.
Old 04-15-2008, 06:57 PM
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that sucks man. maybe better luck next time. It could have been **** poor track prep, or maybe you were a little to excited to get the car down the track and the driving wasnt as good as it should have been. I know i was disappointed when i took my car down to the track after a couple "mods", but after the excitement wore off i got in the zone and did better. could of just been the track though. 5psi is pretty damn low to be running them tires too.
Old 04-15-2008, 08:52 PM
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Originally Posted by RAIDER
What's goin on man, you really were going through those tires like nothin. Poor tires never stood a chance.
Thanks man
Old 04-15-2008, 08:54 PM
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Originally Posted by cookba
that sucks man. maybe better luck next time. It could have been **** poor track prep, or maybe you were a little to excited to get the car down the track and the driving wasnt as good as it should have been. I know i was disappointed when i took my car down to the track after a couple "mods", but after the excitement wore off i got in the zone and did better. could of just been the track though. 5psi is pretty damn low to be running them tires too.
Everyone else was hooking. I was also leaving easy. It has ALOT of traction issues.
Old 04-15-2008, 09:47 PM
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21psi and work your way down in 1/2 pound increments.
Old 04-15-2008, 10:42 PM
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change tires. Seriously, with the modifications listed in your sig and the 10 Second club note in your box there, shouldn't we be asking you for advice? Get ET Streets.
Old 04-16-2008, 05:39 AM
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Originally Posted by Duffster
change tires. Seriously, with the modifications listed in your sig and the 10 Second club note in your box there, shouldn't we be asking you for advice? Get ET Streets.
Well thats just it. The car has been in the 10s with the old set up. But I am seeing how everyone has been running high 8s in the 1/4 and wanting to know how they pull that off. lol
Old 04-19-2008, 02:46 PM
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Probably bad track conditions. I had a similar experience last week when I went to the track. Couldn't get below 2.0 60' and was running like 8.5's. I was hooking better on the street after I left then while at the track.
Old 04-19-2008, 03:22 PM
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Originally Posted by 1999ssls1
Well thats just it. The car has been in the 10s with the old set up. But I am seeing how everyone has been running high 8s in the 1/4 and wanting to know how they pull that off. lol
You're probably seeing automatic cars running in the high 8s on these tires. Trust me, your frustrations are very familiar to me. I too kept hearing how these MT DR's were the cat's ***, so I decided I needed to try them as well. Well, after spending all of last year trying to make my car hook on them, I gave up and went back to regular bias ply ET Streets this year and haven't looked back. My car was averaging 1.9-2.0 60s last year, and the first time out to the track (second pass) this year it went 1.66. I think the shock of dropping the clutch is just way too much for these tires. Even an auto car leaving off the transbrake loses some of the initial hit from the follow-on converter flash. Don't get me wrong, they are IMO the best DR on the market......they just aren't very forgiving on a stick car.

FWIW, if you would still like to try using the DRs for a while, I found my best luck with them at 20psi (tried higher and lower) and slip the clutch instead of dropping it. Doing this I got a best of 1.77 60', but it won't be easy on your clutch and isn't optimal.

My advice would be to lose the radials on a stick car and get some regular ET Streets.
Old 04-20-2008, 07:18 PM
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MT says not to use them with a manual in the car. Find a set of ET Streets and go back to the track and tells us how it went.
Old 05-02-2008, 12:50 PM
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16psi heat them real good...side step it
Old 05-02-2008, 01:06 PM
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You also need to adjust suspension if possible to take some of the shock out of the clutch dump for a T56/DR setup. I found slowing down the weight transfer actually helped a DR/T56 setup.

With me, it consisted of raising the LCA to the middle setting, softening the rear shocks helps as well. Other than that, it's trial and error. Like someone else mentioned "side stepping" is not a great idea on DR's. A deliberate, but progressive release of the clutch will do you much better on getting out of the hole.
Old 05-02-2008, 01:19 PM
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i was going to say - suspension adjustment?

it appears you have some suspension parts to play with. those tires aren't made for a stick car, but they shouldn't be THAT bad..damn.




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