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Tech Area => General Buick Tech => Topic started by: Joel Russo on September 28 2013, 09:40:46 AM

Title: PSI For Mickey Thompson ET street Radials on the Street ??
Post by: Joel Russo on September 28 2013, 09:40:46 AM: You guys running them on the street, what psi are you running?
Title: Re: PSI For Mickey Thompson ET street Radials on the Street ??
Post by: Steve Wood 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
Title: Re: PSI For Mickey Thompson ET street Radials on the Street ??
Post by: Charlief1 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
Title: Re: PSI For Mickey Thompson ET street Radials on the Street ??
Post by: Joel Russo 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~
Title: Re: PSI For Mickey Thompson ET street Radials on the Street ??
Post by: 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.
Title: Re: PSI For Mickey Thompson ET street Radials on the Street ??
Post by: Joel Russo 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
Title: Re: PSI For Mickey Thompson ET street Radials on the Street ??
Post by: 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
Title: Re: PSI For Mickey Thompson ET street Radials on the Street ??
Post by: Joel Russo 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.
Title: Re: PSI For Mickey Thompson ET street Radials on the Street ??
Post by: Charlief1 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
Title: Re: PSI For Mickey Thompson ET street Radials on the Street ??
Post by: PacecarTA on September 29 2013, 09:30:59 PM: http://www.mickeythompsontires.com/tech.php?bulletin=s3 (http://www.mickeythompsontires.com/tech.php?bulletin=s3)
Title: Re: PSI For Mickey Thompson ET street Radials on the Street ??
Post by: Steve Wood 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 :)
Title: Re: PSI For Mickey Thompson ET street Radials on the Street ??
Post by: kidglok on October 03 2013, 11:04:10 AM: 26-28 psi works for me. Any less they feel "squirmy"