has anyone seen chine walk change with a power and prop upgrade if so what was done and how did ut affect chinewalk

Got to be a little more specific to get some good answers. Are you adding power and you're worried about chinewalk or are you trying to get rid of some chine walk???
Different props and the amount of trim are the main factors. Trim tabs will help. What boat, HP, and prop are you running or planning on???

Alot of times you get drive shimmy, if you dont have external steering, which will cause chine walk

its a 1999 20" wellcraft excalibur, it has what they call step lift VII bottom which has a small pad. this was a genric question, I just wanted to see what happened to chinewalk as power and prop increased

My old boat developed a chine walk problem when I raised the drive. The Hydromotive prop did alot to smooth it out. I also found that running the boat with a second person help things dramatically. I'm assuming that with one person the boat was no longer able to balance it's self on the running surface.

Ill have to see how bad it is with my new prop (23 mirage plus old was 21 mirage plus) if its not to bad, I think I may hold off switching to a 4 blade till after I make more hp

I had a real chine walk problem on my Checkmate. Around 65 to 70 range things would get really loose and chine walk would get pretty severe. I had a 23Mirage and went to a 24 Hydromotive. The chine walk is gone now. This will vary by boat but if you get a chance try a 4 blade it may be the answer.

I don't think there's a "generic" answer for you. I would suspect that it has to do with hull design, hull dimensions, prop, among other things. I don't think it's a "black art" - has to be some fundamental physics that can explain some of this. Maybe a tech guru like Tomcat has some insight.

there are several factors affecting chine walk.

balance being one of the most important.the faster the boat goes forward,the more it rides up on its pad.the more it rides up,the less there is to balance the boat on.the less there is to balance the boat on,the more likely it is to fall off the pad to the heavy side(drivers) usually.For some reason,many builders like to stuff trim pumps,batteries etc on the same side as the driver.why,who knows,but it really has an effect on balance and thusly the propensity of a shallow v hull to chine walk.

High rake 3 or 4 blade props can have a great effect as well.the amount of stern lift a prop generates will affect the running attatude of the hull.some hulls will run better nose up,some flat.it really depends on the design but needless to say,some hulls will get real squirrelly if you push the transom up.Some will settle down.

Looseness in the steering will amplify chine walking if not corrected and will be worse the faster you go.