I had alot of chine walk when I first got my 354V at about 50-52mph. Moved a few things around and run the boat per the tach and feel. I know I'm trimmed right when I have zero torque steer--that's when I stop trimming--and it's running at 5500 RPM and 58mph (more trim just runs the rpm up but gains no speed) will prolly be a bit faster once I get the prop cleaned up a bit(and may pick up the chine walk again). Took me a few weeks of running and such to figure the whole thing out (since it was a new to me boat this summer) but it did the trick. I did read a good spot on the BPS site about driving high performance boats and how to deal with chine walk which helped alot (read it 3 or 4 times before I took the boat out)