EWB

Have n/a 540 in a profile cat the boat runs 85 with a labbed 30 at 5200 and 82 with a labbed 28 at 5400 there a guys on this board running as fast in v hulls what did I do wrong the motor started life as a blower motor I pulled the blower off and swapped the cam out installed the crane 741 brodix intake and nickerson 1050 carb the comp. is 8.5 the heads are merlin 340 that have been ported (this maybe some of my problem) imco standoff box with 3" rise and 1.5 extream sc drive what do you guys think that Ive done wrong?? Thanks

liquid lounge

I don't think your numbers are that far off, it would take a very formidable motor to run 85 in most V hulls. Being a little familiar with that hull, I'll bet a paddle boat will take you out of the hole with the current set up. Three things I would look at: 1- Are you sure that hull likes the Bravo 1 prop the best? Call Profile boats in Sumner Iowa and ask....though your shortened drive may limit or help with certain props. 2 & 3- Call Jim Valako [Valako Raing Heads, I think in Grand Rapids MI] and see if he can put some of his wedges in your intake port, at 340cc + porting those ports are gigantic even for a 540 incher at 5200RPMs! While your heads are off , check to see what your true compression ratio is...if it was built as a blower motor, you might be closer to 8:1.
With these last two things, I think you would pull that bigger wheel better for a few more tics on the speedo, and more importantly; increased drivability....resulting in a PLEASURE BOAT.
Have a great day.

Tinkerer

Jim Valakeo will know the answer to the head problem. It does sound like the ports are WAY too big. I have the wedjes in my heads and boy do they work great.

Jim Valakeo-616 735-0800