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-   -   24 with 525 or 600 (https://www.offshoreonly.com/forums/superboat/146458-24-525-600-a.html)

cuposterchild 12-07-2006 10:34 AM

Re: 24 with 525 or 600
 

Originally Posted by Pat McPherson
I few years back I corresponded with a fellow, Gary in Albany.
Gary had a 1995 24' Super that he had purchased new.
The original power was a 350HP/454Mag carb'd engine.
The boat ran 73-74mph GPS at 5000rpm spinning a 3 blade 25p Mirage.
Gary pulled the engine and had it dyno'd and it made around 400HP at 5000rpm.
Then he had the engine worked over, ported heads, roller cam, new intake, carb, ignition, exhaust, and...
After some $5000 in mods, back on the dyno; she made 498HP at 5600rpm.
He said with the same 3 blade prop she ran 81-82mph GPS at 5600rpm.
Cracking the 80mph mark was confirmed by the next owner of the boat here on OSO as well... :D
.

Boat sounds familiar :D

Pat McPherson 12-07-2006 11:29 AM

Re: 24 with 525 or 600
 

Originally Posted by cuposterchild
Boat sounds familiar :D

How's she running?
When are you going to come play on the CT river with us?

cuposterchild 12-07-2006 11:39 AM

Re: 24 with 525 or 600
 

Originally Posted by Pat McPherson
How's she running?
When are you going to come play on the CT river with us?

I am making the Oct run next year come hell or high water....I drive back and forth on the weekends all summer up to the 1000 islands but I am thinking that June might be a good month to keep the boat down this way as it is still pretty cold up that way. Looking into places to keep it for a month or two next june!

Pat McPherson 12-07-2006 01:30 PM

Re: 24 with 525 or 600
 

Originally Posted by cuposterchild
I am thinking that June might be a good month to keep the boat down this way. Looking into places to keep it for a month or two next june!

We start boating in the CT River the first weekend in May.
There are two marina's in Chester that let you store on your trailer and use their ramp. That is what I do...

SUPER AIR 12-08-2006 08:51 AM

Re: 24 with 525 or 600
 
JAYHAWK: Not to pick: GPS accuracy: GPS is nice and precise until you get down to scales under 50'. GPS time and frequency reference tool.How do you calibrate a barometer in my GPS? What you are actually calibrating when you want to view the correct elevation or normalized/barometric pressure is the alitmeter,The barometer is simply a sensor that determines the ambient air pressure, or the pressure around you. Once a pressure reading has been obtained, you can calibrate the GPS altimeter based on either a known elevation or the barometric/normalized pressure. "GPS GARMIN ETREX HAND HELD"

Please read this in detail: Takes 1 hour to dial in for an aprox: average and accuracy of a GPS fluxuates and is not exact. One GPS can be off mult MPH from another unit.

http://gpsinformation.net/main/etrexsum.htm

FX10 12-08-2006 12:29 PM

Re: 24 with 525 or 600
 
Super Air, My etrex doesn't need to be calibrated. As is states in the link you postede. The etrex " SUMMIT" is the model that needs calibration. I've used my unit many many times against other GPS's. In dash units and hand helds. All were the same reading as mine.

SUPER AIR 12-08-2006 03:53 PM

Re: 24 with 525 or 600
 
The point is GPS is not precise - anyone that understands how it was designed and what they want the public to use it for can realise. GPS can and sometimes are diffrent from unit to unit. Speeds, marking etc.

TeamSaris 12-08-2006 09:24 PM

Re: 24 with 525 or 600
 
The step bottom should run mid 80s with a 525 and low 90s with a 600 right?

Superbabi 12-09-2006 04:51 AM

Re: 24 with 525 or 600
 
Johnny, the #s between the 525 and the 600 should be about 3-4 mphs at best.

cuposterchild 12-09-2006 09:33 AM

Re: 24 with 525 or 600
 

Originally Posted by Superbabi
Johnny, the #s between the 525 and the 600 should be about 3-4 mphs at best.

FF2 not to step on your thread but here is another thing to think about. I think both Dave M and T-Islands have mentioned that the 496 is pretty tight in height...wouldnt you run into a height problem with the 600 withouth hatch mods? What about the 525 w/exhaust? Gary had plans of throwing a 177 blower on top of my motor too but didn't want to cut/modify the hatch...not to mention the thing screams without it! I might be refreshing my motor next winter just to make sure all is well and the fact that the builder hasn't seen the motor in a while from the boat being out of state....still don't think I would go over 500hp. I will admit cruising at 55 at 3250 rpms is REALLY nice...it is really an unbelieveable motor.


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