454cid
Sooper Pooper
I went from a 265/75/16 to a 295/75/16 and I feel the difference. It’s not a power loss it’s the engine and trans not in the right range on the power band. The optional size for my truck was a 235/85/16.
I found the same thing, when I had 285/75's. I figured that since I had a big block, and 4.10 gears I'd be fine, but the transmission programming was still set for the stock 245s, and it was very noticeable to me at light throttle cruising in town. I thought the transmission was slipping at first. When I went back to a stock size tire everything was fine. 265/75 and 235/85 tires didn't have that effect.
This thread makes me want to tire shop..... I do actually need them, too.