tomas_wallin

I bet there are quite a few 24/7 hulls, without step bottom, out there with 496 HO's.

Ï'm about to finish my 24 Pantera racing project that will be rigged with 496 HO with CMI Sport tubes and Bravo X drive.

My goal is to reach 75mph but it would be very nice to get some info about your specifics:
Hull:
Year:
Exhaust:
Prop:
X-dim:
Speed:
Etc.

Out There

Thomas, several boats ago so I don't remember everything you are asking.
2002 24 Pantera Sport
496 Mag HO CMI Headers
ITS Box with XR Drive- Standard Depth
Ran two different props 24 Bravo, I think and tried a hydromotive
Kind of liked the hydro because it porpoised less.
around 4900 RPMs, not over 5,000
low 70s every day and I think I saw 75 a few times

I made the ITS/ XR and CMI change all at the same time so I don't know which made the most difference. I suspect the XR slowed it down a bit and the CMI helped to offset that and it was an overall wash.

Hope this helps,
Greg

I need to write this stuff down because I forget some of the details!!

tomas_wallin

Thanks Greg,

Was the drive at about 17" before and with the ITS?

Out There

The drive was a did remain at the factory 17" height. I think there may have been some gain to be had by going higher with the propshaft.

tomas_wallin

Yes, especially with the ITS that puts it even lower because of the angle of the water behind the transom.

grads2112

God I hope so, I hit 76.5 mph in a bone stock 26' Eliminator Eagle with a 496HO

METALMUNCHER72

Well, I did'nt have a 496, but a 454, and was a little dissapointed with the performance. I brought a 79 Pantera back from the dead a few years ago after a guy I bought it from stripped it out for an outboard conversion! Yuck! Clean hull, dead straight, high and dry. Built a Fresh, carbed, 454 (450 flywheel HP) 10.5 cr, big cam, Victor intake, holley 800dp, #781 heads, mild porting, Stainless marine manifolds, custom dry tailpipes, Bravo in stock location. Best speed with mirage plus 3 blade, 23' 67mph at 5200, mirage 21' 65 mph at 5600, and 65 mph hydromotive 4-blade 22' at 5000. I built it to crack 70 but never did.. All in all I only had about 3k in the engine, but was a little dissapointed on the speeds. I figure the motor made 500hp, but probably upwards of 6000+ though.. The Pantera is now gone and I'm currently finishing a 24 Superboat with a 477 BBC, 500hp at the flywheel for sure this time, so I hope we see the 70's!!

Out There

1.5 MPH. Same motor different hull. So?

tomas_wallin

Anyone else with a 24 Pantera and 496?!

onesickpantera

iTrader: (1)

Not a 496 but with a stock 502MAG I ran right at 70mph. A little more on a good day and a little less on a bad day. My X is 17 or 17.5(I can't remember for sure).

Fastest prop was a standard Mirage but is slipped like crazy at cruise and offered a very "loose" feel at WFO. Mirage + slipped less but was slower.

Rev4 was by far the best 4 blade. A little slower than the 3 blades(about the same as a Mirage + though)but handled much better and is a great rough water prop.

My boat hates a stock Bravo prop. I tried a labbed Bravo that had some bow lift built into it and it was better but not as good as the Rev4.

I did try a Hydro QIV and it was okay but took a ton of trim to loosen up. I think with a higher X the QIV would work better.

I now run a Turbo Lightning or Rev4. IMO my boat would respond well to a shorty. These boats have good natural bow lift and using less trim would help the boat ride flatter and get better forward thrust. Just my $.02.

Tomas how about some new pics?