what are you seeing for speed, I plane at 3000 with 20-30 seconds of cavitation when over half tank and almost no cavitation with quarter tank or less, drives at 0 tabs at 2 or 3, running with 2 in spacer which nets about 1 in below bottom which ny the sounds of it is good considering my wheel's are 16 5/8 dia

Moxy

Justin does burnout for a mile until it hooks up, then it's on lol

Yes, if you bury the tabs, which limit your top end considerably! So no, not really, but plan to install spacers over the winter months, see if that helps the attitude of the boat.

Correct, burnout city. Planes like sh!t, even with 18" dia props, then takes off like a rocket.

I would say your setup is dialed in almost perfect on this hull. Don't change a thing.

Not sure yet on my top end. I think it went 92-93,mph @ 5100-5200 rpm w/30" pitch props? I've never had it WOT, in fact, the blades on the carbs aren't even opening all the way. It's like I have throttle stops, need to adjust linkage. Limiters are set @ 6,200RPM, but never had it over 5,100RPM if I can recall. Trying to run 32s but it will not get up on plane without holding it to the wood for a half mile, which I prefer not to do. So, just going to run the 30p props for now until I can install spacers and do more dialing in next season, on the setup.

I am guesstimating that I have 1.4:1 drives (was told 1.5:1), which puts me around a 12% slip at above numbers? HP is at 1,080 per side.

Or, if they are 1.35:1 drives, would be a 14% slip, which seems more realistic....

What's it do at 3500? That's where most of us run the boats. It's as fast, and for as long, as your wallet can stand. Then it's back to 3500

i'd swear there was a 38 thread where the last maybe 12-18 inches of the outer strakes where angled down side to side. (not hooked, no speed loss, plane/porpoise correction)
the way the guys were talking about it, calling the guy by name, seemed like he was a glass guy at cigarette and he figured it out.
i just can't find it yet, had to be 5-6 years ago.

well as I said about 1 inch below bottom, 16 5/8 4 blades, cupped for sure, not sure if that has impact but boat would not plane with 3 blade mercs, some tab but not much, my motors I'm told are built to turn 6-7000, but ill never even try it, I feel ill likely get to 6K with tuning on the injection, I would love to get to the mid 90's, also it makes huge difference how much fuel I carry as to how quickly she planes out and if she cavitates a lot or not

Moxy

Yes, with high X dim, I noticed fuel level plays a major role in plane-ability and top end. Must really affect the COG, a lot.

Damn, wish I would have just built huge CI fuel injected NA engines as opposed to blowers. Seems like not much payoff for all the extra HP & equipment. These boats are slugs.....

It actually does really well cruising with the 32s, and hence why I want to run them as opposed to the 30s.

I can't remember exactly what it does at 3500, I would say 65-67mph from memory and comparing to my upper end number? Seems about right.

put those in a twin step and go have some fun.....she'd be a rocket