Bob's Plate on, test run complete, and yes more questions....

[BADBK]

Ok got'r done! Install wasn't too tough. A guy from S&F that's local let me borrow his A-frame lift and one of his workers for an hour or so.

Ended up screwing the pump to the base of the rear seat after all. I don't have the time right now to make a fancy bracket to put in the knee well.

So test run went good. I love the functionality of the plate. Goes up n down pretty quick. I get on plane faster, and new top speed of 82.2 GPS MPH. Chine walk was GREATLY decreased too. I have the plate up to 3.5 out of 6 and eyeballed it before I went out thinking that would be plenty high, but I'm assuming I have more I can jack it up. At 3.5 it's pretty much even with the pad and I can jack it up 1.5" ABOVE max lift...

My mangina swoll shut and I was scrrrrrrrrrd to jack it up any further for fear of blowing the prop out of the water and gettin beat up....

With 12" setback, how high can I go?? Looking for proven no b.s. it's been done not "you should be able to" #'s. I will listen to all suggestions though.

 

[bluehealer]

I'm runnin' 18" of setback

and am up to 1 3/4" above the pad so far at 92.4 mph,and i moved up one more hole this year,so i can go as high as 2 1/4" above,so i need to stay with a large diameter prop,so i don't blowout (not fun).The farther back you go,the higher you can go,and the less trim you need.A high rake prop is also recommended.
Chris

 

[Heavy Handed]

and am up to 1 3/4" above the pad so far at 92.4 mph,and i moved up one more hole this year,so i can go as high as 2 1/4" above,so i need to stay with a large diameter prop,so i don't blowout (not fun).The farther back you go,the higher you can go,and the less trim you need.A high rake prop is also recommended.
Chris

ROCK AND ROLL

 

[BADBK]

Guessing your running a sportmaster lower?

I'm just wondering what the breaking(blowout) point is on my yami lower??? Not really looking to find out, which is why I didn't go any higher today.

I'm running a worked 29P Yami T1, down to 28P now and almost spinning it to where I want to be. Getting 57-5800 now looking for 6-6100 and the 85 MPH mark.

 

[hotbeek]

Watch your water pressure. What does Yammie recommend for WOT pressure ? You'll want to jack to a point close to where you're losing water pressure. You'll also want to watch your rpms and speed. You'll find a spot where rpms will start to increase and speed will start to decrease. I also found that at very high x dimensions I was losing some bow lift running a small diameter Trophy Prop. Ideally you'll want your case running parallel(sp?) with the water which tends to be close to level(mid) trim+-. You can expect to see a rooster tail behind your boat 4-6' high+-. Too big a rooster may mean your over trimmed. Little rooster mat mean your under trimmed.

There's a lot of variables that come into play when you're looking for that sweet spot and no one here has identical setups. Whether it be different engines,different setbacks,different props,different shaft heights,different lower units/gears all this comes into play. You're just going to need some seat time to dial yourself in. You're headed in the right direction ! Keep "evolving" you freak'n cave man !

 

[hotbeek]

Bluehealer is running a coned Torq Master with low water pickup.

 

[hotbeek]

I don't know what gear set you're running but if I could get 300 more rpms with the same prop running 1.75's that would equate out to 3.5-4mph.

 

[BADBK]

^ Good info! Water pressure above 10 PSI is acceptable... I am seeing 20+ still. I was still trimming it up as far as before so I'll try a keeping it down next time(saturday).

Are my worries of taking a swim(blowout) unfounded? Where are you running yours at?

 

[BADBK]

I don't know what gear set you're running but if I could get 300 more rpms with the same prop running 1.75's that would equate out to 3.5-4mph.

Precisely what I'm looking for... to hit 85

I have 1.75's in the yami too. Spun 57-5800 today, I'm pretty sure @ 82.2 looking for 6-6100.

 

[hotbeek]

Your water pressure looks good yet. That lower looks sharp. It has a nice conical nose. I wouldn't worry so much about blowing out. Don't get me wrong it's freaky when it happens. Most of my blowouts came from running a stock lower(fleetmaster) very rounded, blunt nose. At speeds 80+ the stock lowers tend to lose the efficiency battle. The big nose will send an air bubble back to prop and skeg and walla blowout.

Next outing find your height setting by small increments up on the jackpklate. Watch the water pressure closely. Also keep an eye on temp too. Some times pressure can be good but water entering can be very aerated. This is not the best for cooling. Keep trim around neutral or slightly above.

Last year I was at 3/4" ABOVE pad. This year with coned lower and more setback I'm going to try 1 3/4"-2"

 

[hotbeek]

There's a lot of trial and error in perfecting a setup. The more variables you have only complicates it but also maximizes it. You've already come a long way from where you started. That's why everyone always says "seat time" is the key. You've proved that already. Pretty soon mid 80's will be another walk in the park.

 

[hotdaddy27]

Very nice speeds!!!

Keep up the good work.

You made the right choice by going with the BOB's!!!!

 

[BADBK]

Good news is I can jack it ALL the way UP, no problemo... bad news is this might not be the last thing I do to the setup... Too rough out to go absolutely balls to the walls today to see if it affected top speed any.

 

[hotbeek]

Where does full up put your prop shaft height ? Wait till you get a chance to see if you gained more rpms ?

 

[hotbeek]

Get a straight edge, put it on the pad and run it out to the nose of the drive. Measure the distance difference from pad to nose. Or you could measure from the ground to nose and then subtract the difference of pad to ground. Make sure you're using the same settings(trim and jack) as you use while boating.

P.S. You can do this while it's on the trailer. It's a little tougher to do while in the water ! LOL You freak'n caveman !

 

[BADBK]

Alright, jacked all the way up I'm running right around 1" ABOVE the pad. I still need to trim it up pretty good to get top speeds, which is NOW 84.9 MPH!!! Not bad for a stock, reliable, still under warranty, fishin mota.

Would like to try a few different props when the opportunity presents itself, but she's running good. Good out of the hole, good mid range and the 85 MPH top speed is awesome.

If you have either of these and want to sell/loan, lemme know.
28P Bravo 1
29P Tempest

 

[hotbeek]

What kind of rpms ? I got a 28 Bravo and a 30 Bravo that I've got to run when I get broken in.

 

[hotbeek]

Look mid 80's are a walk in the park now. Did you gain those couple hundred rpms ? Are you at your highest setting for jackplate and clamp ? That's why I went with the two jackplates just so I could get the extra height.

Good Luck with your setup. Keep the updates coming. I hope to add some info on my setup as soon as I finish break in. I'll try to get another video with my GPS unit in sight.

 

[BADBK]

Running right at ~6K. Boy, that 30 Bravo labbed would be someting else.... pvs holes in them?

 

[BADBK]

I could go up one bolt hole up on the motor, but think it's pretty good where it is. I'm still getting 20+ psi water pressure WOT jacked all the way up. With a diff prop I'd like to see high 80's, but 85 is respectable...

Looking for a BIG a$$ 32P Cleaver to get worked real good and go for one good pass....