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Drag Racing Discuss Drag Racing here be it dirt or tarmac. Sponsored by Sydney Dragway.

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Old 28-04-2008, 12:49 PM   #1
montyv8
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Default drag radials tyre pressure?

thought i'd start a thread here after the conversation in the clevo forum about tyre pressures.
I'll be running a pair of Mickey T et street radials (275/50/15) on my coupe at the Aff meet this weekend, I think a few others will be running the same tyres.
I'm curious to know peoples opinions on what tyre pressure I should run, any suggestions on warming them up, such as just a quick small burnout, etc, and anything else that could be useful to this first-timer

I have no idea how much prep work is done to the track at heathcote, maybe someone else can help with that info?

Thanks.

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Old 28-04-2008, 02:57 PM   #2
gregaust
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13 PSI ,same size tyre and didn't need a real big skid though willowbank is pretty well prepped .
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Old 28-04-2008, 04:38 PM   #3
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Greg is that cold or warm pressure ?
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Old 28-04-2008, 05:17 PM   #4
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I run mine at 18-20 psi
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Old 28-04-2008, 05:38 PM   #5
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12psi cold worked for me with 235/15's.

They have a stiffer sidewall than a full slick.
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Old 28-04-2008, 06:27 PM   #6
XDean
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Guys, straight from the MT tech bulletin,

Proper use of Mickey Thompson ET Street Radial
Inflation Pressures

On the racetrack DO NOT use starting pressures below 11 psi.
Recommend pressures for:
P295 and larger sizes: 11-14 psi
P275 and smaller sizes: 12-16 psi

On the highway we recommend running 75% of the max psi as notes on the sidewall of the tire.

Burnouts
The tread compound used in the ET Street Radials is designed to heat quickly and does not require a heavy burnout. Continue the burnout until the engine starts to pull down. We do not recommend a dry hop after the burnout.

Bead/Wheel Slippage
Some bead/wheel slippage may result during the course of a 1/4 mile (or 1/8 mile) drag race. This is normal.

Of course this is just the recommended parameters because every car/combo will be different but it is a good place to start.
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Old 28-04-2008, 06:35 PM   #7
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Quote:
Originally Posted by naughts
I run mine at 18-20 psi
Thats pretty spot on,i would run that the 1st time then go down from there.
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Old 28-04-2008, 09:08 PM   #8
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Quote:
Originally Posted by Falcon Coupe
Greg is that cold or warm pressure ?
13psi was warm .. Was on a 3200lb car running low 10's .
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Old 28-04-2008, 09:29 PM   #9
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Quote:
Originally Posted by XDean
Burnouts
The tread compound used in the ET Street Radials is designed to heat quickly and does not require a heavy burnout.
: thatīs why Tiapan kept blowing them off the line!! Heīs the burnout king ;)
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Old 03-05-2008, 07:45 PM   #10
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I run mine at 14 psi, cold. 235/60-15 et street radial.
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Old 04-05-2008, 08:35 AM   #11
CAMS290
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12-16 psi and check them after every run.
They can creep up by a couple of psi after a run.
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