Quote:
Originally Posted by leathermang
I also worked in a front end alignment shop... and I am glad you used the word ' Voodoo' ... that is exactly what that was and I will explain the physics of my opinion on that....
The tires are a certain size at a certain psi.... the temperature makes no difference..... he should have put the tire at whatever psi he wanted to set the front end at.... and set the alignment...... then told the owners they needed to set the tire psi the next morning when the tires were cold...
He had no way except guessing as to the psi the tire was going to be the next morning when it was cold....
hopefully most of the settings he did were on cars which had been in the shop long enough to get front end parts replaced... thus cold enough to be accurately set that day and it be good when the tire cooled...
' he died stupidly' .... don't leave us hanging on which stupid means he fell victim to....
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the voodoo he used was to measure the tire temps across the tread and set the alignment to equalize this temp rise on the tread itself... nothing to do with overall tire pressure.
the overall pressure was adjusted based on the vehicle load info... but he could not do it, as the temp of the tires was raised from the driving. he simply set the cold pressure at 30 front, and 25 rear... his reasoning on this was the motor is heavier than the trunk... normally. yes, he STRONGLY recommended to the owners of the vehicles to set temps when the tires were cold. he always recommended they follow vehicle specs for pressure.
he died working on his personal car in his driveway without jackstands, and the jack collapsed and the car crushed him... so, yeah... stupid.