The SCX-4 is 4 inches shorter. My boat has the Standard HP transoms. My speed gains came mostly from raising the propshaft height 4 inches.

I put standard SCXs on my T/S gun w Stellings boxes. Didn't notice any speed gain, maybe lost a couple. Not sure the x4 would get on plane. I had a hard time getting on with the 1 inch spacer out of my XRs.
Mine are at least a couple inches higher with the Stellings then standard or ITS to begin with.

DID notice I made a WHOLE summer WO drive issues!!!!! about 750 HP WAHOOOOOO!! Don't have the wife in my ear "That FU@KIN boat!!! " worth every $ ;)

Can they take a bigger diameter prop than a bravo?

Isn't that funny, when the boat is running good the wife thinks it's the greatest thing in the world but when it's broke, it's worst f'n decision we ever made

Both the SCX and SCX-4 can use a number 6 style prop although its more common for the -4 to use a #6 and the standard SCX to use a bravo style. So yes they can take a bigger diameter prop.

Nice thing about the standard SCX is you have the strength to now prop your boat more aggressively with a 5 blade maximus or a bravo style herring.

OP

There are boats like yours with success running standard SCX and Arneson. You will be the first to dial in a pair of -4 drives....

Im running a 6 blade herring now. the boat has to handle much better with a larger diameter prob I would assume...

My motor dyno'd 1600. Scx 4 on 27 Daytona. Beat the piss out of it and love it. You always go scx upper and sc
lower, you can run bravo props that way.

X2 whole season no issues.

I heard u can get #6 prop shafts with them also?

Yes you can get #6 prop shafts on the SCX.

Tell us more about your boat please. Year, Current Drive height and/or X-Dimension, Current props

Do you have any other goals besides gaining strength over the Bravos?

Is budget a concern? Or best Bang for the buck?

How long do you plan on keeping the boat?

Any plans to upgrade power?