Quote:
Originally Posted by gocntry
I Upgraded / Upsized The Tires On My Chevy Tahoe To 34 x 11.50's They Are An "E" Rated Tire With A Max Of 80 Psi. I'm Currently Running Them At 45 Psi. Think I Should Run Them Up To About 60 Psi Or So ?? Any Thoughts On That?
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I'm very surprised that a Tahoe would experience porpoising on any but the worst road. That is a long and relatively heavy truck.
If you are indeed experiencing porpoising, it couldn't hurt to try raising the tire pressure. Try the values you suggest, moving up from 45 to 60 psi. If you have a piece of road that causes the problem, try running the pressure up to 60 psi, drive 10 miles, then turn aournd, lower the pressure to 45 psi, and drive back.
It also occurs to me that soft shocks might contribute to porpoising. Though I never owned one, I'm old enough to remember those great big ferryboat luxury cars (Lincolns, Caddys, and so forth) that the "old folks" drove. You could drive over an acorn in one of those, and the back end would bob up and down for a full minute. Talk about a soft ride! I doubt that this is the Tahoe's problem, though.
Bill