2" Shaft? I thought the #6 ran the interchangeable hub type props with 1 1/4" shafts. School me here.

I guess what I am asking is what would it take to run a #6 style small hub cleaver on my XR. I have always wanted to try a tru cleaver on my cat.

My boat does 98-100 mph. Initially when I got my SCX upper, I lost aproximately 3 mph in back to back comparisons with a SC upper...using the same lower unit. I then realized that the SCX upper was heavier and moved the prop 3/4 inch reward. I purchased a 1" shortie, and put a .5" spacer in it. I was now .5 mph slower with the SCX upper as compared to the SC upper. I tried using the shorter SC lower on the SC upper, and it was slower than the SCX/SC combo.

Data:
SC upper/SC lower / standard length = 100.2mph
SCX upper/SC lower / .5" shorter = 99.8 mph
SC upper/SC lower / .5" shorter = 98.7 mph
SCX upper/SC lower / standard length = 97.5 mph

Hope this helps,

Chris
I have 930hp +/-

Good info thanks. If I get a scx I would want to run the upper and lower scx for strength. Have you tried a scx lower on your boat?

No, I have not tried a SCX lower on my boat. I did have IMCO tell me that unless you were running the lowers in full surfacing mode, that the SCX lower would be slower than the SC lower. By how much... I dunno.

I have also noted that on IMCO's 34 Nordic cat... that they ran SCX uppers with SC lowers... behind 900 hp motors.

Chris

I think you might want to ask KAP about his SCX.. Pretty certain it is toast. Didn't the Apache raise the X dimension as well or was that a different boat? If the same then this would get some of the speed back that was lost.

Rik, what's the MSRP for your Bravo conversion? PM me if you'd rather.

KAP broke the gears in his SC lower.

Chris

$23K per side complete with the items listed on our flyer which is basically everything other than propeller.

A few things are taken for granted on applications such as the boat already has full hydraulic steering as we supply the correct helm unit but the internal plumbing is not included for example and the boat has thru transom exhaust and a thru hull water pickup as the Arneson Surface Drives have no water pickup or exhaust system incorporated in them.

But for the most part, all the bolts, nuts, washers, studs, indicator clamps, etc. are in the kits.

Rik

Sorry you are correct. The SCX cost him 15 mph..

If the scx lower didn't slow boats down so much it sounds like it would be the way to go because by running a sc lower your back to square one of chewing up merc lower gears, I have chewed up plenty of them (1050 hp/ft lbs of tq), Smitty