Dustin...when get home I will post the full size just for you.

Hoozeyurdaddy...no problems at all with porpoising. x dim. is not real high and boat runs the fastest with neutral trim. In my opinion it is a very efficient hull. I remember hotboat did a test on it in i think 2001...it was the fastest single 28 they had tested with a 575sci to date.

Two other setup things... I am going to fab up a 3/16" stainless "whale tail" to get on plane faster to take some stress off the drive. I am also going to work on getting more air in and out of the engine bay.

What is your setup?

Have you thought about adding an intercooler?

I'm running a 622ci naturally asperated, dynoed at 830hp@5800rpm, Imco SC standard with a extesion box up 3in, I do all my boating on lake powell, elevation is 3600 ft. I'm running a 26P B1 and 1.34:1 gears at 5600rpm, gps between 94-96,
I would like another 2 or 300 rpm but not sure where to get it.
I've looked at 5 blade props or have the 26 labbed, this boat is slow to plane, but as soon as the bow drops rpms come up and your off, prop is 15 1/4X26, looking at a 14 1/2X28, what do you think the out come would be. where are you going to put the whale tail? on the hull or drive?
thanks for the info.
Larry

I would love to add a intercooler but have ran into a few problems. I dont have clearance for even the whipple low profile cooler(which is a very nice piece). I researched cutting the hole, or adding a scoop, and also having a whole new hatch made...just too much money (beside the cheesy cutting a hole thing). My cocpit cover and mooring cover would have to be redone also. Even if I did add the cooler I would be spinning the little 256 even faster.

So...I think my money is better spent on getting more air in and out of the engine bay, dropping the thermistat to 120*, 3.5" pulley, aluminum heads (think I will end up with canfields), camshaft, and ECM remap and upping the limiter. I think this will reach max out the injection, blower and pocket book.

The 575 is what it is, small blower, small throttle boddies with great lower end...sounds like Im talking about my girlfriend! Oh, **** cam also.

I looked into tunnel tabs but fabbing a whale tail for the drive is a lot cheaper and that lets me spend more money on the motor. Here is some example of tails.

Gotta love tan lines!

I think you guys would both really benefit from 5-blade Hydromotives. If your having trouble getting on plane, then you have a pretty high X, and the 5 blades work really well for that. But if your running a 26, I would say the boat would do better with more pitch, different gear. I've found the single engine cats need 1.5 gears and large prop pitch to carry nose at high speed. Just my .02

J rider, call randy schultz , I traded my tall scooped hatch for his low profile scooped hatch, I had the 575 with the superchiller kit on mine. he has other hatches also, call me if you want his number. dean 612 978 9897.

Hi Jeb,
With the stock cam, I have turned 5600 with no issues. With the hydraulic roller, 6000, no problem (except the XR drive).
The chicks are looking good. Maybe we can work a trade out ............
Regards,
Steve

Steve...you better upgrade your spark arrester! I didnt know merc made a 540ci 871 version...lol

Once you get into changing the engine from stock, and wanting to remap the efi it really requires a dyno tuned expert. I have gone through all this this past winter. Have you looked into the Arizona Speed and Marine kit? They have taken all the computer recal quess work out of it. They sell all the parts and will recalibrate for you. With their kit fit?

After what I went through this winter with my Whipple and aluminum heads, I'd would have kept the stock heads and had Whipple do the computer. Strickly for less head aches.

Here is their kit, they claim 80 hp. Thats not bad for bolt on items. http://www.azspeed-marine.com/me575sciboki.html