I would think a stock Bravo would be slower than a Imco with a spacer but on my boat the stock Bravo with very well blended hydromotive nose cone still drove better and faster than the Imco did, Smitty

That is interesting, now that I have a IMCO!

Whats interesting is Max Machine worx claims there billet lower is faster than everything else, B-max used to claim there "crescent" lower is faster than the others, etc, etc. You might find yours IS faster , my boat never seems to respond to the things that make others faster other than more hp, Smitty

TW720HVY it wold appear we have taken very similar routes regarding upgrades. I would be very interested in reading about what yo have done and the results!

I just re-read your post, I thought you said " a imco should be FASTER than a stock bravo" where you actually said it should be a BETTER drive. They are not always faster but the shafts and components are definately better than a stock bravo with the exception of the gears which are the same, Smitty

-2" shorty gave my boat 2-3 mph more, made the boat run flatter in the rough and shoots a cool rooster-tail. It likes a 4 blade prop; A B-Blades 30p Bravo 1 in my case.

I raised my x dim up 3", recut the hole on the transom. Gained about 3-4 mph, flatter and faster.

I would be more than happy to share results but I really don't have anything yet. The boat hit the water for the first time last weekend at LOTO.

I believe I had the wrong prop on it Bravo 1 26P (Merc Labbed). It was not very good out of the hole and only topped 4900RPM. The engine dyno'd at 560 @ 5400RPM.

It idles like crAAp and stalls in and out of gear and I have an email to the builder about it and haven't heard back.

On top of everything else I have water coming in from somewhere and I haven't had a chance to trouble shoot it yet.

Hopefully tomorrow we'll get it in the water again with the original prop, flash light and mirror.

There are always things to iron out...doing some of that myself Best of luck and hopefully we can read about it soon.

I went from a standard lower with nose cone to a -2 imco shortie on my 1998 baja boss and noticed a huge difference in top end speed and handling. It made the boat very "happy" well worth the swap.