need to update XR Drives ??
 

Hello group, i had purchased a set of XR Drives last summer and now i have updated the motors to 1000HP with lot's of torque and need to update the drives. Any suggestions? I know SSm#6 is the way to go, but the work that goes into it and moving the back seat and transmission gets very costly. Has anyone used anything different that would be a replacement of the Bravo drives, which will handle the torque and the power???

There is not any drive that is going to hold up to that much power except the #6. I have spoke to Imco and the do have some of the scx drives on big power but no info on how long they are lasting. Good luck!

Arneson makes a bravo replacement that has the transmission in a extension box so the engine does not have to be moved but I don't know what the power rating is for that model.

That's great advice right there. Any bravo behind 1000hp and a heavy boat will be short lived. If the Arneson isn't what your looking for, check out the new Imco drive. I believe it's the SXC(?). It seems to be placed between an XR, and a six, in terms of durability.



Darrell.

The SCX is new and when I talked to Imco before the holidays, I was told they have not received any complaints. The bullet is larger and setup has to be done to compensate for it. Just what that takes is up to each combination. Nice thing about it, it's pretty close to a bolt on. Needs a differnt helmet, and only fits the Merc HP gimbal or the Imco gimbal. I got a chance to put my eyes on a new SCX and it is a very nice piece of equipment. You can see they put a lot of thought into it's development! Being a new drive I was unable to look inside.. :( Maybe in the future.
There are others available and more coming on the market. Upgrading to #6's, well you might consider buying one with them already. Any way you go, it isnt cheap! Just some routes may be better than others!!

Good luck!
Dick

maybe some older wet sump 6s would be a good choice?

go with some wet sump 6's, don't even waste your time with any other drive, they just wont hold up, you'll be down all summer and spend a fortune

The #7M will handle the power with no problems. Can't say that of the others and they are less expensive than the IMCO.

This is what i would do !!!!!!

But i can sell u some #6's and rerigg the boat for u aswell,,,for a good deal ,,specialy now since i am hurt.:ernaehrung004:

Rik,
how much are the #7M? What are the details on them?
Thanks!
Dick

2000hp in a 33 Outlaw nuckin futs. The hull won't be able to handle the speeds anyway.

bravo drive upgrade
 

reading all the comments, it looks like i will be trying to use Max Machine Worx drives. From research for the price, it seems they are going to be the best choice at this time, unless someone has a better idea. I will be bringing the power down to about 850-900, but the torque is still there, it looks like the power is not the main issue on the drives, but the torque is the big factor.

I had no idea, before i purchased the motors and now i am stock with big power and not being able to use them like the way i wanted to, unless going to #6 drives, which are way over my head on the financial side.

Would love to hear more on Max Machine Worx from any one that has used them or heard of them.

Who on here treats XR gears?
Was curious on the cost.

We use Max because of their race tower/bearing combo.It stab. the gears better.Send them your upper case and they will machine/install it.AS far as XR gears are go they will puke over a certain period of time.The key to not having a blow up mess, disassemble drive ever year and inspect all components.If you see wear on face of gear, replace IMMED.Sometimes they last awhile,sometimes the gears are worn after 20-25hrs,it is what it is.

ArticFriends did a couple sets for me a couple years
ago, was $ 80 per gear back then.

Drives-
 

1000hp wow- really? Whats the build look like-?
Maybe you can step the blower boost down a bit with a larger pulley.

if you can pull down to around 900 you can use-

The Imco SCX- super strong

Teague platinum shaft- XR

You can have Teague rebuild your XR with his gears and shaft and Imco lower warranted for 1 YR with his engines its a very strong drive

Bmax

An NXT drive can likely handle 900

Yeah a #6 is the best choice- only a v-drive, or jet can handle more than a #6


OF all these options your best bet is probably a Teague mod, and a little less power.


Uncle Dave

Oh one more-
 

And I forgot the very cool arneson drive- this to can withstand ridiculous power, and is THE most efficient drive.

the "Arneson principle" dictates the top half of the prop swing is a parasitic waste and eliminates it - with the props 3 to 9pm as the only part in the water- thereby reducing parasitic loss.

Downside- a giant exposed prop on a hydrauliclly actuated arm can kill towables, or skiing - the rooster tail is on par with a jet-o-vated equipped berkely on 5/8 UP - and can be considered dangerous for swimming etc. They make a guard for it, but it is what it is.

Uncle Dave

Mike wrote:
Hello Uncle, thanks for the info. Yes, we are going to change the boost from 7 lbs to around 4-5 and some other stuff, but the torque will still be there. At this time, we are planning on using the upper of Max Machine, i have lot's of good comments about them and for the price looks like what i can afford. Have you heard anthing else about the Max drives?

Actually yes-
 

I have heard very good things about the b-max upper.

I guy named Quent has had Imco and Bmax and likes that B better.

He had it in back of a 900HP Tyler Crockett blown big block in a Lavey Sabre cat, and said it outlived the Imco considerably.

Right now hes got a 24ft LaveyCraft bowrider with an Ilmor 710 in it.- runs mid 90's

Send him a mail or look him up- waay cool guy & has first hand experience.


Uncle Dave

Do a search about Max Machine Worx drives. They lasted 25 hours on our boat.

The Bravos are right at the surface to. Remember the propeller shaft is only 2-3" below the keel and thus the upper half of the propeller is out of the water.

We have a propeller guard that offers more protection than a Bravo or Speed Master does.

I have a few boats that ski behind them and it does not hinder them.

You guys are way out of my league for now. Any chance you want to sell the XR's to a struggling new and up comer? Please email me at [email protected] Thanks!

XR's
 

Mike wrote:
Yes, Max Machine is building the upper for me, but I am keeping the Imco shorties. I think my mechanic took the XR drives to Max in Lake Havasu and they should be back in 10-15 day's as the new uppers are ready. If you are interested let me know and we could make a deal

Please contact me at my email when they return. I'm interested, try to let me know what you would take for them and if you change your mind on the shorties I would like them too, Thanks!

I have a rebuilt xr from Mr. Gadgets with a imco lower on it send me a pm $5000.00 [email protected]

XR's
 

Are the XR's for sale????? / $$$$$$$$ How many hours on them and are the drives chewed up??? May be interested? Thanks

XR Upgrade
 

Mike wrote:
There is nothing wrong with the drives at all. Got them last summer, as i updated my bravo 1 to XR drives, when i updated the motors. But now i just purchased big motors and need to upgrade once again. We were going to upgrade the XR's, but decided to get all the new drives. I will let you know in about a week or so on what they are planning to do.:boat:

sure it will man theres a few BAJAS out there with big power doing fine and fast in the 90 to 100 mph class. that 33 is not a lite boat and handles fine in rough water. AND I HAVE BEEN IN THE ATs the new 33 blows away the older boats two diff animals, a lot to do with set up and step. baja 33 you could look at a konrad to even thought they are rated at a lower hp I know of a few with what you have and run fine. also MR. GADGETS OR MARINE TRANS could up grade your drives. or the surface drives rik makes arneson you would have some cool rooster tails with those :D if not just take it easy getting on plane and getting air you can't miss it.

thats why they sell ski ropes at 120ft or longer:D your not in the rooster, plus I found it to be better sking behind my bravo boat with a 120 or 150ft rope than a standard 75ft rope cleaner water and ocean racing uses 200 ft I think.

$6200.00 merc bravo xr drives. from mercruiser. with warranty. although warranty depends on your engine of course.

Exactly. At higher speeds the longer rope is the answer, but for the safe family tow speeds there is no rooster or spray to worry about.