Drag Slicks! Help! - Ford Mustang Forum
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post #1 of 8 (permalink) Old 05-05-2015 Thread Starter
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Drag Slicks! Help!

Hello everybody... so i have a question... i got a semi built 89 5.0 foxbody, 306, H/C/I ima be running slicks for the first time.. on a track.. my rear end is completely stock... can a stock 89 rear end handle a launch at 2500-3krpm on a sticky track..? Or am i risking to brake something...? If somebody can answer this question ASAP id be very appreciated!

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post #2 of 8 (permalink) Old 05-05-2015
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It's a risk....the 28 spline setup is weak, but some surviver a lot of aggressive launches on slicks, some break the first time...it depends...Sharad had great luck with his and managed pretty low 60fts on a stock 28 spline setup...it's hit or miss really..

All I can say is good luck and it's only a matter of time...Granted, 2500-3000 isn't too bad of a launch but still...

Are they bias-ply slicks? If they are, that will help...a little...


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post #3 of 8 (permalink) Old 05-05-2015 Thread Starter
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Alright thanks bro, and to be honest i dont know... its my first time getting into slicks..
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post #4 of 8 (permalink) Old 05-05-2015
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If you haven't bought them yet get bias plys. If you have bought them already then just expect it to break and be ready to upgrade to a 31 spline setup.

Matthew 26:52-54 / Go Pack Go!

1987 Mustang GT Hatchback - 2V Mod Swap In The Works

1997 Lincoln Town Car, PI Intake/Cams, Sofa-On-Wheels, "Fat Tony" we call it

2001 GT Convertible - D1SC / Geared / Cammed / 440wh 400wt - TOTALED 2/2019
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post #5 of 8 (permalink) Old 05-06-2015 Thread Starter
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There Hoosiers slicks
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post #6 of 8 (permalink) Old 05-06-2015
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Do you know what model tire they are? Hoosier makes a bunch of different slicks.

Matthew 26:52-54 / Go Pack Go!

1987 Mustang GT Hatchback - 2V Mod Swap In The Works

1997 Lincoln Town Car, PI Intake/Cams, Sofa-On-Wheels, "Fat Tony" we call it

2001 GT Convertible - D1SC / Geared / Cammed / 440wh 400wt - TOTALED 2/2019
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post #7 of 8 (permalink) Old 05-08-2015
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If using slicks, make sure you are using a safety driveshaft loop.
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93' LX hatch, 460 w/150 plate, TH400, 9" w/ 3.60 spool. Best (so far!) of [email protected] 146 mph with 1.40 spinning 60' on steel heads
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post #8 of 8 (permalink) Old 05-09-2015
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Is your car a stick or automatic? I know these guys at the track I run at, who ran a low 13 second 289 with 351 heads with 4:10 gears, Mickey Thompson Slicks, C-4 manual valve body transmission, 3500 stall torque convertor, 28 spline 4 lug, stock traction lock posi. They never had any problems. I think they ran that set-up for 4 years. They now have a 351 with a spool in the rear, not sure if they upgraded to 31 spine, but it's still 4 lug, so maybe they have not gone to 31 spline. If you have a stick car, that is harder on the rear. I am sure everyone knows that. But an automatic launch is not as hard, depending on the stall on the torque convertor. So I would say if you are running an auto trans, you are good for now. But consider upgrading the axles and posi at some point if you want to race alot. And what rear gear ratio do you have? The lower the number, the harder it is going to be on the car. For example, when I had my almost stock motor, T-5 transmission, 3:73's and Nitto drag radials and I had 31 spline axles, and a heavy duty eaton posi, launched at 4000- 4500rpms, all was fine. When I went to a Ford racing GT-40 crate motor, a new Tremec T-5z, which has a different 1st gear ratio, 2:95. The T-5 world class that I use to have had a 3:30, which worked great with the 3:73's. But with the new T-5z and lower first gear ratio, and hoosier quick time pro's , which are pretty much dot bias slicks, the car would bog and hook hard on the launch, which lead to in 2 years the clutches in my eaton posi being dust. Went to 4:30's and a Detroit locker.
It depends on what you have and how aggressive your launch's are, and how often you are going to run it. And yes! Get a drive shaft loop!
Have fun!

1993 GT Mustang / Ford Racing GT-40 Crate Motor B-303 Cam / Tremec T-5Z / 4.30 Gears / Detroit Locker / Moser 31 Spline Axles/ Subframe Connectors / BMR Upper and Lower Control Arms / Lakewood Adjustable Drag Shocks/

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