1999 21V bad weight placment or motor issue?

[lohe]

Ok here is my setup ( for wake boarding) and issue. I am not sure if I am adding to much weight to rear and not enough up front or my motor is underpowered.


I have 2 rear locker sacs full cant recall if they are 500 or 600lbs
Then a square/chair sac up front that sits between the to front bow seats thats 250lbs

I also have the ACME 911 prop

With this setup and 3 people ( driver, spotter, rider) it pulls out ok and has a harder time getting on plane compared to my 21i ( taps around 6-7)


Now with a bigger group of people on board ( 5-6 + rider) same sac's filled if I dont have 2 people sit in the bow it wont even get on plane... won't got past around 13MPH

So that would be 3 people on the back bench, driver and passenger bench and that sac setup. It wont pull me past 13mph with out people moving up front, once it gets on plane its ok, but I did notice perfect pass has a hard time holding a speed, not sure if that is another problem lol.

I figured I just need to weight my bow more it just kinda shocked me when this happened. On my 21i adding much bow weight sank the boat lol so maybe that has had me a bit nervous adding more weight up front. And over all that one pulled out much quicker but it is a different hull and the boat its self weighed 600lbs less.


I thought people will add 1500-1800lbs to these with no issues... Am I over loading it or is it just my weight placement?

[bryancm]

I would try pulling up and getting to speed before you adjust the taps all the way to 6-7. Also, seems like you do have a bunch of weight, coupled with the people and taps setting might be a bit of overkill. Not 100% sure on this though, just a few thoughts.

[TRD]

I would try pulling up and getting to speed before you adjust the taps all the way to 6-7. Also, seems like you do have a bunch of weight, coupled with the people and taps setting might be a bit of overkill. Not 100% sure on this though, just a few thoughts.

I second this. I have had that issue also.

[jason@wakemakers.com]

Did you move that 911 from your 21i over to the v, or was it already on the boat? Either way, that's not the right prop for your application, so that's one easy way to upgrade the performance.

The other issue is your weight distribution; you have almost 80% of the total extra weight in the rear of the boat, and with a 21v you want to be closer to 50/50. That will have a huge impact on the boat's ability to get up on plane (the angle of the hull through the water is always too steep). Redistribute the weight in the boat to get it closer to even between the front and rear and that should give you a dramatic increase in performance.

If you want to demo a new prop let me know and I can send one out for you.

[lohe]

Did you move that 911 from your 21i over to the v, or was it already on the boat? Either way, that's not the right prop for your application, so that's one easy way to upgrade the performance.

The other issue is your weight distribution; you have almost 80% of the total extra weight in the rear of the boat, and with a 21v you want to be closer to 50/50. That will have a huge impact on the boat's ability to get up on plane (the angle of the hull through the water is always too steep). Redistribute the weight in the boat to get it closer to even between the front and rear and that should give you a dramatic increase in performance.

If you want to demo a new prop let me know and I can send one out for you.

ACME told me the 911 was the prop needed for my application...

[chpthril]

ACME told me the 911 was the prop needed for my application...

As I may have posted before in another thread, if you have the 1:1 trans ration, which I feel you do, then the 911 is indeed the right choice.

[lohe]

As I may have posted before in another thread, if you have the 1:1 trans ration, which I feel you do, then the 911 is indeed the right choice.

I do have the 1:1 but I will double check.

[jason@wakemakers.com]

We would never suggest a three blade for a loaded down v-drive (gear reduction in transmission has nothing to do with the number of blades used). If you spoke with Bill, Jim or Todd at ACME and that's what they recommended based on how you use the boat then I'm sure they have their reasons, but based on the info in this thread (loaded v-drive used for wakeboarding and wakesurfing), that's definitely not how we would prop the boat.

[chpthril]

We would never suggest a three blade for a loaded down v-drive (gear reduction in transmission has nothing to do with the number of blades used). If you spoke with Bill, Jim or Todd at ACME and that's what they recommended based on how you use the boat then I'm sure they have their reasons, but based on the info in this thread (loaded v-drive used for wakeboarding and wakesurfing), that's definitely not how we would prop the boat.

I will respectfully disagree, gear ratio does play apart in proper prop choice, which includes choosing between a 3 and a 4 blade prop.

If not, then why is a 3 blade 911 a correct choice for 21i DD with 1:1 trans that is weighted for wakeboarding and surfing, but it's completely wrong for a 21V of the same year with a 1:1 used the same?

There are quite a few Tige V-drives that rolled out of the factory with 4-blades, and time after time, the experts @ ACME have recommended the a 3-blade such as the 911 or the 653.

There are a couple Tige DD's that came with a Cutter SS 4-blade and have a 1:1 gear. Again, ACME's recommendation is the 3-blade 911 for those that weight down for boarding and surfing.

Just a couple weeks ago, a Tige owner with a V-drive with a 1:1 trans took some poor advice, and swapped out his 3-blade for a 4-blade and the boat ran like @$$. So, again, how can gear reduction have nothing to do with the number of blade choice?

In no way am I saying that there is NOT a 4-blade that would work on a 1:1 geared boat, but I do disagree with the statement that gear ration is irrelevant, and do disagree that a 3-blade is the wrong choice simply because the boat is a v-drive.

[Fiveflat]

Hey lohe, I went out yesterday and sac'd out my 21V. I had the 300lbs of lead in each locker, filled a 400lbs fatsac ontop of the lead and put a 700lbs sac in the bow hallway. I was way over weighted, worked like hell to get up on plane (brother got up in the bow and helped it out)and we had 3 adults and 3 kids. so about 750-800lbs of bodies.

I don't have the ACME 911, but I plan to get it and I also plan to take the lead out and stick with only the sacs for wakeboarding. Probably the same for surfing as well, but just placed differently.