Airing down/up hot vs cold temps.

[Q1svt]

Just responding to the statement that implies that refilling is always with hot air - it may be often the case, but not universally.

Nope just you being you.

what I said

“Guess if you aired up w/ comp on trail, you’ll be adjusting after”


You and your friends read how RTR is building/ modifying the 2.3l for SAND? How RTR is dealing with the 2.3l heat sink issues w/ Braptor radiator fans?

They RTR seem to understand the 2.3l turbo motor. Lol

… should just block me

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[Brian_B]

Nope just you being you.

Well who else would I be?

 

[DALOLA]

Well who else would I be?

With AI, anyone you want....

 

[lakesinai]

First off, my search-fu must be off because I tried to look for the answer to this question and just got bogged down...

I've always been told to use cold tire temps as the baseline - the 'accurate' temp if you will.
My Bronco HE was delivered with 43psi all round... I lowered that to 39 cold initially after reading the owner' manual.
After it still riding like it has no suspension - and seeing that Goodyear recommends 36 psi as max - I lowered it to 36 psi cold.

After I drive for a little while, the tire temps obviously increase, and as such so do the pressures. My 36 cold becomes 39 hot.

So, the point of this - airing down when off roading. My tires are now hot and I want to air down. A few psi difference does not really matter off roading at the slow speeds I will be doing, so an indicated 20 or 22 psi would be fine. But when I air up to get back onto paved roads, do I air up to an indicated 36 or higher to match the hot tire temps?

Shouid I just try to maintain the same psi no matter the temperature?

When I finish a day at the beach, I air back up with my onboard air to my normal 35# for my 33" tires. Next morning, the tires might cool down to 32 before driving. Once at the beach, I air back down to whatever the sand calls for, the trip to the beach warms the tires up. On the road trip back home the next morning, after warming up, the tires might be a pound or two lower because they were inflated hot, but that just means more comfort. I'm just not that fussy about it if it's 32-35# on the highway for 32's or 33's. Once home, and not off roading, I might add a little air to calibrate at 35, but, ambient temp goes up and down alot anyway. IMO, a TP range of a few pounds variance is fine.

 

[23OBX2.7]

My door sticker says 36 psi. Im at 34 at 65F on new Destination XT. The pressure increases 1-2 lb after driving just a few min in cold weather. Ive seen 4-5 lb variances on old LTX Trail. It seems the larger tread blocks create more heat. Im curious what the variances will be in summer weather.

Can still do speed bumps at 30 no issues

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