has anyone tried to use the its shorty sportmaster ?? or something like the imco extreme ??

on a 28 pantera??

I was wondering the same thing.
I think some of the guys with a notched transom use shorty drives.
However I was wondering if these would work on a regular transom like mine. I wondered if a standoff box would help any.

Im runnin a 2" shorty. No notch. Cant say it improved my speeds any. I also ran a Imco extension box and that did nothing for the boat either. Some paople feel that they are running better with a OEM Merc XR lower. Keep the propshaft around 4" below the keel. That seems to work best. Try running a Hydro QIV prop. They tend to lift the transome and the boat runs mutch better , even when trim to the sky.

Bruce -

I thought you had good success with the Bravo 1 props? I'm running a 26P Labbed Bravo on my 28 now. Would a hydro be better in your opinion?

Hi kirk,

The "full pleasure" configuration 28' needs bow lift due to the added weight of the cabin. Hydromotive props are fast props but give transom lift due to the large diameter and cleaver style design with pointed ears. The Bravo 1 prop are rounded ear in style and are designed to give more bow lift and added bite out of the hole. In Rough water the Hydromotive props work well since they keep the boat flying level due to the transom lift. We tested a new P5-X rounded ear Hydromotive 5 blade on American Express 28' and seemed to work well .

5 blade props work well normally when you have a very agressive high drive
height.

Bruces 28' does not have a cabin and has a higher X - dimension than a "full pleasure" 28'.

We have mounted Speedmaster drives on 28s and a few with Imco Bravo 1 drives. We have not seen much performance gains by installing boxes on the 28's. The 28' has an 11 degree transom angle so it is very important to have the extension box with the same angle. Most boats have a 13 degree transom angle.

We have not installed Shorty Sportmaster Bravo 1 drives on a 28' as of yet. F2-71 35' does have a pair since we needed the added clearence and deeper skeg for improved handling with the stepped bottom on high speed turns.

Regards,

JO

I would think thers benifit to the imco lower if you are running above 85 , the standoff box does intrigue me though??

i think the box created more problems for me than anything. Dont waste your money.

Jo, the boats w/ speedmasters and trannys...
how'd they run, with the engine and COG moved a bit forward.
And... were any of the 28s built with TRS drives?

Jo, How about the Arnenson drives.
Did you ever build one with an Arenson drive?

What drive set up would you recommed
for a pleasure version with 750 to 800 HP?

Which drive set ups have you done that
give the best performance gains?

Thanks
RS