Tempest + vs Fury 3

[jcourtright]

Current setup:
2014 Nitro Z-7 175 Optimax Pro Xs
8" Z-loc jackplate: off the top of my head I cant remember what ptp is. started out at 3" and raised 1/4" at a time until started losing water pressure.
24 Tempest - no work done
recently added two power poles which dropped top speed from (GPS) 67 to 63 @ 5750 RPM

according to http://www.rundquist.com/how_change_pitch.htm by going to a 25 fury I will:
5750 rpm - 200 for pitch change = 5550
add 500 for diameter change will get me to 6050 RPM and speed should increase, hopefully gaining back what I lost on the top end.

Any concerns you guys see? I know its a lot more to it than that because the tempest SHOULD cause more bow lift than the fury so that may hurt me.
Let me know what you guys think.

Thanks

[Savage]

Your speed is gone forever.

[zeke4351]

A 25 Fury spins like a 26 Tempest.

[jcourtright]

Your speed is gone forever.

To be sure not...

[nitro2130]

you won't be able to turn a 25p fury efficiently.

[jcourtright]

Any suggestions?

[Joe4d]

If your boat was set up well to begin with, you arnt gonna add speed after adding weight. The Tempest is a decent prop. Best and most economical thing to do would probably be to record all your former and current specs. And send your current prop out to be polished and balanced and tweaked.

[zeke4351]

If your boat was set up well to begin with, you arnt gonna add speed after adding weight. The Tempest is a decent prop. Best and most economical thing to do would probably be to record all your former and current specs. And send your current prop out to be polished and balanced and tweaked.

This would be your best bet. Talk to Mark Croxton.

[lpugh]

Any suggestions?

Yea, a 225 proxs

[Savage]

To be sure not...

Sorry Sir, but your dead wrong! If the boat was setup and running optimal BEFORE adding poles, then the total speed loss, after adding anchors is NOT recoverable.

[jcourtright]

maybe a dumb question... an sounds dumber as I write this... after adding the weight of the poles, should I have to wry about changing the motor again to get the prop out of the water more?

[mdtritn21]

Get the 24 Tempest B&B and you'll get some speed back since most even number tempests need some work anyhow. To bad you don't have the 175 pro xs that tachs to 6000.

[GEEBASS2000]

Something else changed. Poles should not cause 4 mph loss. I ran the same boat with no poles then 10 foot blades, maybe 1mph drop. I say maybe because i doubt conditions were exact. The poles will drop the speed but if you lost 4 mph maybe when they mounted the poles the jack plate slid down. Most power pole mounts do require them to loosen up a Z lock or at least mine did.

[jcourtright]

I installed them myself, the jack plate didn't move. I guess I could always lower the plate back down and work it back up 1/4" at a time until I find that sweet spot again. I made a scribe line when I finally had it set for future reference. If I end up back at the scribe line then I know its definitely where it needs to be.

[jcourtright]

Well, got some good news, uh, for myself... took the boat out this weekend with my fishing partner and did some riding. Had him move to the bow while at wot to see if speed changed... speed dropped a little, I guess our idea on this was if speed increased then we needed a prop with more stern lift. Since it was a very small decrease in speed he moved carefully to the stern and that’s when he saw what he saw... the power poles are dragging in the water by 4”-6” at wot. That’s a lot of drag! Going to get with my TM/PP guy to see if we can get different brackets. These are the ones that popped up on the PP bracket selector for my boat/jackplate. I don’t know, but that’s my problem...

[jcourtright]

And btw, the jackplate is all the way to the top of the transom and the pp brackets are as high up as they can go on the jp, any higher up and the steering ram will hit when the motor is lifted...

[MengRanger]

Looks like you have a good fix to get most of your speed back, good job.

[jcourtright]

you won't be able to turn a 25p fury efficiently.

Sorry to open this back up, but what do you mean efficiently? loss of fuel mileage? To much slip and wont get the MPH that I calculated? terrible hole shot?
Thanks

[zeke4351]

The 25 Fury is too much for your boat to turn enough rpm. As I said before a 25 Fury is same rpm range as a 26 Tempest Plus. So if a 26 Tempest is too much for you so is 25 Fury. You will have slow hole shot and slow mph and won’t be able to turn enough rpm. Those calculations you came up with are not even close to reality.

[nitro2130]

^^^^ this.... A 23/24p fury or 24p tempest will work. 25p fury is waaaay too much wheel.