kap328

Hello Mr. Gadgets:

I agree if you space the drive you will need a longer coupler. That is not what I wrote perhaps it was not clear. The point I was making is to not space it and put the coupler in which would mate the SCX upper with the SC lower.

The point is when your running to determine differences in speed you do not change the lower and the drive height at the same time. You need to keep your variables down to one change at a time ie...change lower unit to SC and see what boat runs versus changing drive lower and the height.

It is my understanding that the SCX upper cannot be mated to the SC lower without the custom coupler which IMCO has already produced.

Second, a IMCO SC lower is 2-3MPH faster than any XR I have ever bolted on and it would certainly be much faster than any early SCX lower. I know because we ran them in two different boats and the loss on the top end was equal to losing 110+-HP or MPH take your pick.

I still haven't heard of anyone running 1000HP+ with an SCX/SC drive or even a complete SCX and see if it survives and part of survival would be driving finesse' aka throttle input.

I appreciate the input on speeds with respect to your friends boat any information sheds further light on the subject.

Hello 2112:

I thought no one would ever ask that question. If you look in Performanceboats.com forums in the Strictly Boating section you will find a complete review of about 5 pages. The name of the thread is X-Power Drive Consumer Review the facts are laid out including conclusions.

In any event I thought about posting it here on OSO but Perf Boat Forums usually occupies most of my online time. I'm rushing to type this response or I would post a link to the thread if that is permissible.

As far as speed goes I have a prop coming which I hope will be the ticket for the top end.

KAP

2112

Just read through it....WOW.

Here is the link;http://www.performanceboats.com/html...onsumer+Review

I think this should be shared.
.

Back4More

Any NXT's taking a S h i t? Being that it only has a single vertical shaft I was waiting to hear of failures.

Airpacker

i have just over 900hp in a 25 daytona, SCX / SC combo. 20 hrs and so far, so good. I would have eaten an XR upper by now. They only ever went 20 hrs before spitting teeth.

26 REDLINE

I have a brand new SCX with a 1.24 SC Lower, motor just dynoed out @ 1078hp and 998ftlbs torque we will see how it holds up, but I did have a MMW which I blew up, broke clutch shafts but believe it or not I never had a lower gear set fail, and that was babying the drive so we will see how it acts this summer, the drive will be tested in a few weeks and then its off to Desert Storm...

kap328

Hello Airpacker:
I appreciate the input and I remember that sound of ding ding ding in the gear cases. Usually when your having fun. I'm glad to hear your having success.

26Redline is a friend of mine and he will be running the same combination as you are.

Hello JF:

You better make sure everything is running superb. I want to go for a ride in the "Bayou Blaster" it should be a lot of fun once you get it set-up and tested out.

Do not worry I will have your back here on the West Coast.

April is just around the corner.

KAP

CB-BLR

At this point, if you want to run a spacer between a SCX upper, and a SC lower, then your only option is to use the lower unit vertical conversion shaft, an SC spacer, and a SCX longer coupler. When not using a spacer, you can just use IMCO's SCX to SC conversion coupler.

Because of when I originally purchased my SCX upper, I installed the conversion lower shaft into my SC lower. They did not have the conversion coupler available at that time. I will be trying my drive with, and without a 1/2 inch SC spacer... I also have a 1/2 longer SCX coupler.

I should be getting my motor back from Dustin in about a week. The motor is dynoing at just a hair over 930 horsepower. I will definately let you guys know how the outdrive combo holds up in my 28 ft Nordic Heat.

Hoping to cross over the century mark in my little, open bow, innertubing boat.

Chris

kap328

Comment:

I think your SCX to SC lower combination will work for your HP output. The lower gear set is the weak link in that combination some people never have trouble with the lower--- I did.

The issues really develop when you have over 998HP and matching torque. 26Redline will be a good test case for this drive as he runs it hard but not necessarily abusive and he is running substantial HP/Torque output in his boat.

I expect no drop in top end speed with this application even though the gears are bigger in the upper---parasitic drag or not when your putting out over 1000HP the boat is gonna fly---generally speaking I know of some boats which are pigs.

I would like to hear someone banging on one of these with a 1200HP big cube motor and medium weight cat to give us a review. I know 26Redline will have a verdict for us when he gets done with the upcoming summer season.

KAP

skav

I'd be interested in getting a price on the SCX upper w an SC lower.

Sean

campionchase910

X2........I also would be interested