I was wondering if anyone is running a imco shortie on a 25ol with out ext boxes? Did it improve handling and speed or did it hurt it?
My boat is a 98 25ol with hp500, it has the notched transom. I will be changing cam and heads so motor will be close to 600hp.
thanks

Not sure I have seen that combo yet...usually it is box and no shorty. Or box and shorty. Let us know how it comes out.

I am running Stelling box and shorty...still gettting it dialed in....

look up wild card he pick up 4 or 5 mph with a 3'' raised box by imco back in 07 and in 08 he add a 2'' shortie but spaced down one 1'' in the end and went from a merc 525 at 81 to 87 or 89 with the 600 merc. I pick up a lot with just a 2'' shortie on my 24ol power was 670hp 83.2 before carb change it was 650hp went 76 and no shortie.

what is your x dimenson

Yea, you need to know how deep your drive is in the water before anyone can give advice. Measure your propshaft centerline and report back.

thanks. i will have to wait till i get boat out of storage

A 98 250OL SHOULD BE 7 1/2'', but I could be wrong, art

It should be, but some of the dealers ordered them raised.

Regardless, order a -2" and try it then spacer it down if it's not right, although it will be fine with -2".

seems deep for stock set up