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Author Topic: PSI For Mickey Thompson ET street Radials on the Street ??  (Read 4972 times)

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Offline Joel Russo

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PSI For Mickey Thompson ET street Radials on the Street ??
« on: September 28 2013, 09:40:46 AM »
You guys running them on the street,  what psi are you running?
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Offline Steve Wood

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Re: PSI For Mickey Thompson ET street Radials on the Street ??
« Reply #1 on: September 28 2013, 01:20:03 PM »
They wear very quickly so I run Nittos instead but I would try around 26# and don't get close to any water
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Offline Charlief1

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Re: PSI For Mickey Thompson ET street Radials on the Street ??
« Reply #2 on: September 28 2013, 03:48:07 PM »
You need to look at the pattern on the ground when you run a non standard tire to see where the tread sits. If the pavement is dry put some water on it and drive through to see if you're getting a full contact patch or not. Start around 26 but I'll bet money you'll be closer to 18 when you're done. :hmm
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Offline Joel Russo

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Re: PSI For Mickey Thompson ET street Radials on the Street ??
« Reply #3 on: September 28 2013, 04:07:54 PM »
That's what I thought.  I just put on a set of 275/50's and put 25 lbs in them to start.  I'll run them through some water and check the contact patch and adjust from there.  Figured I would prolly have to drop a few pounds so as not to wear the centers out as I stuck them on the original wheels. 
Thanks gents~
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Offline Charlief1

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Re: PSI For Mickey Thompson ET street Radials on the Street ??
« Reply #4 on: September 28 2013, 04:37:06 PM »
If it's on a 7" wide wheel it'll be closer to 15-16 psi.
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Offline Joel Russo

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Re: PSI For Mickey Thompson ET street Radials on the Street ??
« Reply #5 on: September 28 2013, 04:55:22 PM »
Quote from: Charlief1 on September 28 2013, 04:37:06 PM
If it's on a 7" wide wheel it'll be closer to 15-16 psi.


Thanks Charlie
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Offline PacecarTA

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Re: PSI For Mickey Thompson ET street Radials on the Street ??
« Reply #6 on: September 29 2013, 07:27:36 AM »
on the street its not about contact patch but prolonged use with sidewall flex   which will heat and destroy the sidewall and the tire

mickey recommends 75-100% of manufacturers recommended pressure
i run them at 26 street and at track may go as low as 14.5
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Paul   Magnabuick.com ..NJ rep
86GN pump gas 93/alky 109, iron heads, stock mains, no girdle  9.72 @139
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Offline Joel Russo

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Re: PSI For Mickey Thompson ET street Radials on the Street ??
« Reply #7 on: September 29 2013, 07:52:50 AM »
Quote from: PacecarTA on September 29 2013, 07:27:36 AM
on the street its not about contact patch but prolonged use with sidewall flex   which will heat and destroy the sidewall and the tire

mickey recommends 75-100% of manufacturers recommended pressure
i run them at 26 street and at track may go as low as 14.5


Didn't think about the sidewall, but that makes perfect sense Paul. 
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Offline Charlief1

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Re: PSI For Mickey Thompson ET street Radials on the Street ??
« Reply #8 on: September 29 2013, 04:23:02 PM »
You're right Paul, it's not about contact patch, it's about the total use of the tire. Even if the tire has 75% of the tire pressure and the tire's hard as a rock, that means there's to much pressure. The only true way to set proper tire pressure is to scale the car, determine original surface area of stock tires and surface area of replacement, and figure out the difference so you can get the right pressure for the proper ride and wear. The manufacturer set the pressures for most economy overall so using the 75/100% formula won't work right if you're not using the stock or alternative tire sizes per manufacturers specifications . :O
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Offline PacecarTA

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Re: PSI For Mickey Thompson ET street Radials on the Street ??
« Reply #9 on: September 29 2013, 09:30:59 PM »
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Paul   Magnabuick.com ..NJ rep
86GN pump gas 93/alky 109, iron heads, stock mains, no girdle  9.72 @139
best 1/8 6.13 @ 112 ,best mph 144
https://www.youtube.com/watch?v=vSKzv7ej7Cc
87 GN TTop 109 ,93/alky , 9.82 @ 139 20.6psi , best 1/8th 6.18@113.2
87 GnX'd 
87 GN TTop..stock as can b

Offline Steve Wood

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Re: PSI For Mickey Thompson ET street Radials on the Street ??
« Reply #10 on: September 30 2013, 09:41:47 AM »
Running on the street is different from running in a track situation.  There was a reason I said 26 psi in the first place :)
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Steve Wood

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Offline kidglok

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Re: PSI For Mickey Thompson ET street Radials on the Street ??
« Reply #11 on: October 03 2013, 11:04:10 AM »
26-28 psi works for me.  Any less they feel "squirmy"
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