cat1972
sorry I didn't get your post untill now. Call me anytime 281-235-5174
Art DiNick

I have a 26 A/O with a 502 EFI. I purchased a M1 procharger and Eddie Marine Exaust. Is the stock cam the way to go or not. Does anyone have any info about the cam /prop size i need.

do you have the 415 HP magnum engine? Do you have 1.36 gears?
if so with 7 lbs boost expect 85 to 90 mph with a 28 pitch prop. what speed are you currently running?. my guess is 72 to 75 mph. A cam change always helps HP. I suggest changing to Hydraulic roller lifters and using the HP525 cam. you can get everything you need from Teague.

Just found this thread. Hope some of you are still around. I bought this boat from Artie D 3 years ago today! Good Friday. Must be a real coincident. This baby is a lake rocket. Art knows his way around engines. His 31 is a bit faster than the 26 I named 1 BAD BOY but he will not race me. Anyone looking to buy a real boat and get what you pay for email me [email protected] for a recommendation. Big dogs hunt. AO cats hunt big dogs. Here poochie poochie.

Hey. Glad to see that you guys are keeping this thread alive.
My A/O 2600 ran 121MPH a few weeks ago on the first full pass with boost. It was still pulling when I pulled the throttle back and I had already trimmed it in a tad, so I'm sure it will run at least a few MPH faster when its dialed in.
The motor is a Scott Shafiroff built Dart 540, with AFR 345 heads ported by Jim V and a relatively big Comp solid roller, exhaust is Stainless GENIII dry exhaust, M-3 Procharger @ 10lbs of boost (w/belt slipping). This thing accelerates in the upper rpm range like a fart in a hurricane!! The drive is a stock XR upper with an Imco Extreme 2" Shortie lower w/ 1.34 gears and the prop was a bone stock 32 Bravo 1.
I'm gonna try to get it to run 130, if the drive holds up that long!!

i have an nxs with a 500efi and a top mount whipple 7lbs of boost 28 degrees total advance. drive is a xr upper with imco lower standard height 1.34 gear. prop shaft is about 1/2 below center sponson.
2 people in the boat lesss than 1/2 take of fuel 103 gps
prop is labbed to a true 30 pitch 15 1/4. i figure the motor is at least 750 hp.
tried a shortie drive handled fine but way to much slip.
ice chest, full of fuel, 6 people 94 gps.
would love to see 110gps any suggestions maybe to much dia. in the prop

boat was alot faster before i started using a gps.

Chad:
What kind of prop are you running? Also, your boat must have a high X-dimension from the factory, or was modified. My boat has the propshaft centerline about 1/2 to 3/4 inch below the pad WITH the 2" shortie. Have you tried a five blade on it? Or more pitch? Also, what RPMs are you turning? If you have the stock rev limit (5250 rpm) you're doing damn good because you're only getting 7 % slip, which is very good.

sounds like our drive height is the same. prop is a throttle up labbed bravo 1 4 blade 30 pitch. rev limiter is at 5600. i can get the boat to about 5500 on a good day
best speed ever 103 always 98 99
these are gps speeds
my boat ran 110 before i took out the speedo and put the gps map. that thing must be heavy. lol

do 5 blades work on the ao.

my prop slip is 12%
5500 1.34 103mph gps
no fuel, no beer, no chicken, 2 people and a tail wind

Are any of you guys running outboards on your AO's. I have a 1997 26 ft NSX with Twin 300x's and I am only seeing about 90 mph on a GPS. The motors are not modified, and I am only running 92 octane pump gas in the boat. I can hit 90 with full tanks and 4 people in the boat, but I have been talking to my setup guy about trying to hit 95 or 100 with the boat. He has recommended going to set of cleavers from the choppers I am currenlty running, I tried a 3 blade and got about 91 out of it, the boat will really needs bigger 4 blades to get it out of the water and mantain the speed.

Any suggestions?