Baja HAMMER owners INFO WANTED

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11-07-2002, 05:42 PM

#11

liquid asset

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Re: True Hammer Numbers

Quote:

Originally posted by Pantera24-650HP
With my 1998 Hammer, 310 HP I get the following results in fresh water:

23P App. 4800 RPM 64-66 MPH (Great Hole Shot/No Top End)

24P App. 4800 RPM 69-70 MPH (Good Hole Shot/Good Top End)

25P App. 4600 RPM 71-72 MPH (No Hole Shot/Great Top End)

RPMS are approximate, but very close as I haven't run a 23P or 25P in a year or so. 4800 is WOT, so I try not too exceed.

Anything else? Just ask.

Kirk

Don Man, don't be to optomistic with these numbers, because true gps , thats not possible. Thats is 0% slip factor, which is mathmaticly impossible, I had a 97 hammer with the 310 hp and a 23'' it ran 61.6 on G.P.S at 400 feet low humidity @ 4600 rpm, thats .08 slip which is good, This boat is still in the family, I sold it to a fellow Texas OSO'er www.boatpropellers.com/propcalc.html

Last edited by liquid asset; 11-07-2002 at 05:51 PM.

11-07-2002, 06:46 PM

#12

Dave M

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Hey Liquid,

Just curious about what the absolute lowest slip could be with a v hull running an I/O. The reason I ask is that I have used some of those calculators such as Winprop. In order to get my rpm, GPS Speed, and slip to match up I have to lower the slip down to about 7%.

Dave M.

11-08-2002, 10:10 AM

#13

liquid asset

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My boat is about 9%

11-08-2002, 10:36 AM

#14

Cord

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My 23' Concord LS-7 ran 68.5 with a 454 mag (365) and a 23" quicksilver 3 blade @ 5200. When I went to a 2" shortened lower, I saw 72.5mph with a 24" hydromotive (when I could get it on plane). A 24" Bravo1 was just a tick slower, better to plane, but wasn't as stable. Both props also turned 5200rpms. This boat required full trim to run fast and it was very prone to chine walk. You had to pay very, very close attention and be in tune with the hull or you'd lose control. The best hole shot prop with the shortened unit was a 21" mach stern driver 4 blade. The boat was a rocket out of the hole. It also topped out at 60mph at 5600rpm (valve float). Do the slip calcs on that one!

It sounds like your speeds are good numbers.

__________________
Damn it! This is the CORDless model!
My boat My boat My boat

Last edited by Cord; 11-08-2002 at 10:39 AM.

11-08-2002, 10:53 PM

#15

Elite Marine

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Props

All the props used on my boat were Mirage Plus. The people on the board are correct, these were speedo numbers only and we are at about 900 MSL here in Chicago. The 24P was actually a repitched 25, works perfect for this boat.

Good Luck,

Kirk