if the twin is this slow, how will a single with 496HO do, mid or low 50s??

62 seems alittle slow to me, but some poeple are probably running that when you consider full load of fuel 160 gal (1280lbs), 5 adults (800-1000 lbs) , coolers and everything else (200lbs), about 100+degress airtemp, and lack of good bumpy water. My speeds stated are very reliable/duplicated. They also seem consistent with the mods that I have made, I est. my hp is about 375-385 (crankshaft) and about 350-360 at prop, compared to the 454 mags @385hp@prop which barely break 70mph, I think I am in the ball park...don't forget about prop styles and drive highth instl which will also greatly affect mph.

4500rpms + 25p = 72mph , Not when I do the math.

That's where the word "optimistic"
comes in:D
Anybody that has these "highly accurate" :rolleyes:
speedo's knows what I'm talking about.
They are a real ego booster ( 'til you
check it against a gps):D

jt

I have a 272, with the 310 hp. I get an intimidating 55 on the GPS!!! If I run that thru the speed calculator

(HP/weight)^.5 * constant, I get a constant of about 225

Using the same range of weight over dry weight, and the 29 with 2x310hp, gets you about 67 mph, using the single 425 hp gets about 60. Is it reasonable for this hull constant to be the same for a twin vs the lighter single configuration?

I have a friend that just bought a 1999, 29 Outlaw with 7.4's.

Finally got to see the both on Lake Norman last weekend. He is all smiles after 5 years with the 272 he cannot believe the difference in ride quality. The 272 does good, but Norman is a very rough lake on weekends and he is cruising much faster in the 29.

However we were running side by side Sunday and I found myself slowing up for him. When we stopped he ask how fast I was running and my GPS speedo was between 62 & 63 MPH. He had four people in the boat, and I to not know how much fuel or what props are on the boat.

Just wanted to share this information.

how about a 2003 outlaw 496 375hp twins top speed????????

This is a thirteen year old thread, but Im sure you'll get some opinions..............if your referring to a 29 OL ?? Im guessing mid to high 60's low 70's on its best day

thanks the marina told me 71 - 72 mph just though i would ask thought the speed he gave was a litttle fast thanks again

That should be about right.