Bias ply Drag Slicks psi

[7GHellboy]

Hey, I'm buying a couple of Hoosiers 28-10 / 18 bias ply drag slicks for my S650. Any idea on how much psi do I need to put on those tires?

I'm currentky using M/T Street Rs @ 15 psi

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[Q6543]

I always run as much as I can, while still getting my desired launch characteristics.

too much will depend on your cars setup and the track prep, we sometimes get radial prep days where I can easily run 22psi, however no prep I may end up down around 15 as well. It’s just gonna be different every time

 

[OldCoastie]

Agree with Q6543, although I use to road race not drag, this is entire different world, and the tire inflation was dependent upon a lot of individual cicumstances. First is the weather, track pavement, temperature, humidity, type of pavement, type of course, (flat, hilly), and driver's style. But I guess launching on drag track is much different. I would tend to believe 18-15 PSI depending upon the heat of pavement and humidity would be the optimum pressure.

 

[7GHellboy]

We drag race on a piece of crap surface (main straight of a circuit track). It is basically zero prep racing. My question is about the psi for a bias ply drag slick, not a drag radial. I ran my radials at 14/15 psi and I've read that the bias ply should use something between 5.5/6.5 psi but that seems pretty low for a heavy car like my supercharged s650.

 

[Q6543]

Get your own prep to help!, whiskey resin or stripper glitter are 2 good ones.
Also I’ve never gone below 14-15psi… it just becomes too much to manage up top, you really want as much psi as possible to keep it stable.

on my foxbody I had adjustable shocks/struts so if prep was poor you could just set the suspension loose to make up for it some, not sure of any kits like that on our newer cars.

 

[7GHellboy]

No traction for the wicked..... Now you know what having no traction means.....

 

[John boschma]

With a bias ply slick i wouldn't go below 15 psi with the weight of the car.
On a drag radial I wouldn't go below 16psi.
You want to always run add much tire pressure as you can get away with.
With the tire you're starting with a 28/10, i would start at 18.

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