What psi for Drags, Tubes?
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From: Lake Jackson,TX
What psi for Drags, Tubes? Just curious, I`m buying a set of 28x10.5x15 M/T drags and was wondering what psi to run. Also, the tires recommend tubes, do I really need them. I don`t drive the tires on the street at all, just track! I never put them in my E/T streets and they worked fine. Thanks, you can see in sig my power and gear. 
The tubes will just help with the stability of the tire if you run really low pressure in it, but you dont need them (they are pretty heavy)
As for pressure you are going to have to just play with them to find out what they like. I would start at about 13 cold, go make a pass and as soon as you get back measure them again they should be about 14 or so. if they spun outta the hole lower the pressure 1 psi, and make another pass. Keep this up until you are happy with the traction. You want to run the most pressure you can and still hook up. the more pressure you have in them the less rolling resistance you have . Remember a little spin is good, I usually shoot for about 7-10% spin.
As the pressure goes down, it will feel like the car is moving around on the top end of the track. This is just the wheels moving side to side in the sidewalls, believe me it will feel strange, what I tell my friends is watch out the hood of the car, if the car hood is staying in the middle of the track it is just the wheels moving, dont correct it because it will just make your car start darting side to side. Remember soft grip on the steering wheel if you need to adjust where the car is on the track soft smooth corrections.
As for pressure you are going to have to just play with them to find out what they like. I would start at about 13 cold, go make a pass and as soon as you get back measure them again they should be about 14 or so. if they spun outta the hole lower the pressure 1 psi, and make another pass. Keep this up until you are happy with the traction. You want to run the most pressure you can and still hook up. the more pressure you have in them the less rolling resistance you have . Remember a little spin is good, I usually shoot for about 7-10% spin.
As the pressure goes down, it will feel like the car is moving around on the top end of the track. This is just the wheels moving side to side in the sidewalls, believe me it will feel strange, what I tell my friends is watch out the hood of the car, if the car hood is staying in the middle of the track it is just the wheels moving, dont correct it because it will just make your car start darting side to side. Remember soft grip on the steering wheel if you need to adjust where the car is on the track soft smooth corrections.
When you mount you slicks coat the inside of the tire with dish soap. This will slow down the leakage thru the side wall.
I use to never run tubes in my slicks, but got tired of having to air them up. Got a new set of Goodyear 30x9, put tubes in them. Now I can run them at 10-11lbs and don't get the "mush" feeling at top end. The tubes have not effect my 60' or ET. Added weight, yes. But I like the feel much better at top end now.
I agree with Btl Feed. No one pressure for all. The track will tell you what it will handle.
David
I agree with Btl Feed. No one pressure for all. The track will tell you what it will handle.
David
I run 15" x 9" x 30" slicks on 10" wheels on my Stockers. For bias ply tires I run 15 psi and with radials I run 18-22 psi. No tubes. Sixty foot times are in the high 1.3's to low 1.4's depending on roll out, etc.
Good Luck,
Daren
Good Luck,
Daren
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Originally Posted by beardWS6
Have anyone of you had ET`s on before your drags? If so How big of a improvement did you get going to drag? Thanks!
I'd like to know that too. I'm debating selling the 26x11.5x16 Et Streets and going to a 26x10x15 Et Drag hoping for more consistant 60's times especially on slick tracks.
