Adrenaline Junkie

So, I was able to squeeze 98 mph out of my 2007 with 496 HO's and the stock 32 4 blades that came with the boat. I was curious on what labs might do for me...my dealer ordered me labbed 34 to test out (per their recommendation) - unfortunately after 30 mins of trying just about everything, I couldn't even get on plane - every time we started to get on top of the water we'd blow out.

I tried everything - different drive settings, different tab settings, different rpms - but it didn't matter

I was trying to break 100 mph without doing any engine mods - wanted to keep it stock.

Is it possible to get a new model 28 on plane with labbed 34's?

jdnca1

Try some Imco cavitation plates...What is your X dimension? Do you have extension boxes?

grads2112

That's funny you bring this up. I tried and tried and tried again on Friday to get my 28' Daytona up on plane with bravo 34's and finally gave up after 45 minutes. Same thing, I'd almost get up on plane then bam it would blow out the props. It was very frustrating. I've just come to the conclusion that my x-dimension is just too high to run a four blade prop.

Andy01

Did you guys try turing in to the motor that broke loose first?

grads2112

Yep!

rbtnt

Do you extension boxes? I run 34s on mine with boxes and a friend runs 36s with boxes.

You might try the IMCO plates as jdnca1 suggests or 5 blades.

grads2112

I don't have extension boxes on mine. I actually asked for them when I was building it and Eliminator told me they had dialed in the boat without them. The boat they tested with 525's that hit 120 m.p.h. did not have boxes. I use 32 5 blades and have no problem getting up on plane. Best speed to date is 110 m.p.h. I'm embarrased to say but I don't know if it has IMCO plates because I don't know what they are.

Adrenaline Junkie

Out of curiousity, did you run 32 4 blades? That's what I am using -would be interesting to see what your top end would be there.

My gear ratio is 1:36 - what's yours?

grads2112

The only props I have tried are 28p 5 blades which were to small on the top end but launched me out of the hole, and 32p 5 blades which are good for all around driving but I am bumping the rev limiters with them, and the the 34p 4 blades which kept blowing out. I could of sworn that my gears are 1:35 but I guess they could be 1:36.

rbtnt

If you have XR drives, they are 1.35. If they are XZ they could be 1.34 or 1.36 depending on your combination of gears. Here's a link to gear ratios.

http://home.columbus.rr.com/mtboats/...earratios.html