Too high depends on the boat, and also what propeller you are running. A lot of the old straight hulls won't react well to high x-dim because of the loss of bow lift. I think for most of the straight hulls, the practical limit is probably propshaft 1"-2" below the hull bottom, while some of the newer stepped bottoms are 1"-2" above.

Well I am running a 98 27 Fountain with a stepped hull. How much speed do you really gain? Is it really worth the money?

so let me get this straight,all my life i thought size mattered but in a boat we shorten things??go fiqure LOL

tcelano has a very good point. I put a -2 IMCO shorty on my Baja 26 Outlaw (straight bottom boat). Even though it would still get on plane easily I lost bow lift and thus speed. I just put in a 1" spacer which helps, but I think I would be better off with full length on this boat.

That was my experience also on my 272, Smitty

My friend is running a 2 in shorty and not getting the speed he and I expect in his 25 OL. I have been suspicious on a lack of bow lift.

What kind of speeds are we talking, just curios, Smitty

Its the same guy you have talked to about trying some differnt props on Higgins. He is in the low 70's w 650 hp

I have 2 1" bravo spacers, one stock and one modified to work with a upper with the max worx tower, I don't have a problem letting wayne try one if he needs. I hope to met up with him and let him try the Greg Hittner/cutting edge labbed 28 that I have as I personally think his stock 28 is hurting him vs labbed, Smitty

Can you do a 2" spacer? I would imagine IMCO would be a better lower than the stock Bravo.

I put the 2" shorty on ours but I also have it set up with the IMCO E-box. Still prop testing so I do not have anything to compare it to yet.

Also, what about cupping your prop?