Originally Posted by Pat McPherson

I did change the cam in my boat last year but it's not easy.
You have to drop the oil pan. With a cam change comes new valve springs and a valve job so you'll be pulling the heads too.
If your 750 cfm Carter carb is working well leave it unless you change the cam. If you are having problems with starting, some people do with them, buy a 800cfm double pumper that will work with mods up to 500HP down the road.
The intake you have is a good one, so don't change it unless your going to build a 5600rpm screamer. In that case you will need a single plan...
Have Fun!

Originally Posted by Dregsz

Why did you have to drop the pan to pull the cam?

I pulled the cam on a SBC in a 18 Donzi this summer w/o pulling the motor. I cut a little hole in the back seat bulkhead but it was easier then pulling the motor.

I agree that a valve job is a good idea, and certainly doing it "right" but he shouldn't need to pull the heads to swap a cam or swap the springs out. It helps to order the correct diameter springs the first time though.

If You can get a already built, proven 600 hp motor that won't kill your drive for under $6K it will be much more fun then building your own.

Evan

Originally Posted by Pat McPherson

Razor, I did a basically stock rebuild on my 502 last winter for about $2,000.
This included the following from a local machine shop/builder:
-clean, hone, install new freeze plugs, and cam bearing in the block $200.
-the heads were cleaned, mag'd, milled 0.010, bowl ported, valve job, new springs, retainers, locks, and assembled $800.
Then I bought new rings, bearings, a Merc gasket set ($450), and an oil pump for about $900 total. Throw in and $100 misc. I bolted it together myself...
Now for another $1200, the engine builder would have assembled the entire engine and given me a 1 yr warranty on the long block, but what fun would that have been...
Razor, I believe you could do a vary nice build up on your engine for between $3,000 and $4000. If you want to risk it and leave the bottom alone then $1500 in parts can give her a little more kick.
Anther 50HP will give you +4 to 5mph, another 100HP +7 to 8mph.
As far as racing, P-5 has a 70mph limit, but I think the boat is too small. Ask fasteddie...

Originally Posted by Pat McPherson

Evan,
It is vary possible to change the cam with the engine in the boat. If the engine turns out to be a Gen VI BBC with a cast aluminum timing chain cover, the pan will have to be dropped to the point it is hanging from the back 2-4 bolts. If the engine is a Gen V, then the timing cover is sheet metal and will be a little more forgiving, but the pan still will need to be dropped some to get the cover off. Removing the back seat on a 24' Super gives great access to the engine, at least on and I/O model...

Originally Posted by RazorsEdge

Hello, I recently purchased a 1995 Superboat 24. It has a 454mag Bravo 1 with about 200 hours on it. I was wondering what could be done to pick up some speed without loosing my low and midrange. It already has K-planes and a Stainless Marine exhaust. Currently running either a 24" Bravo or a 25" Mach. I was thinking of leaving the cam, adding some Edelbrock Performer RPM Oval port Heads, Performer RPM Air Gap Intake, Demon Carb and doing some ignition work. The boat will be run in fresh water, Great Lakes. Any suggestions you could provide would be great.
Thanks,

Originally Posted by Superbabi

fast fun 2 , where are you located ?? I see you have a Jersey brand boat ( avanti ) thanks......................gary