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Old 08-22-2008 | 05:26 PM
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Originally Posted by Strip Poker 388
I would think the TQ curve would have a factor,but again the weight is a bunch of diff!!
Strip- the PB Mag article mentions the torque curve - at 3,000 rpm it makes 500 ft pounds of tq- it also says "with electronic variable cam timing, we can build a torque curve that's almost like a diesel engine, but with a much wider rpm range.
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Old 08-22-2008 | 05:55 PM
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Originally Posted by 4mulafastech
Apparently this 292 has them. I sure would like to see a performance write-up on that rig!

http://www.boatshop24.com/web/en/suc...totalcount=157
Strange thing about that boat - I wonder if it actually exists. If you look at the pictures on that site, every pic appears to be a different boat - Paint scheme doesn't match in any of the 2 pictures...

Maybe 'if you buy it, they will build it'...
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Old 08-22-2008 | 06:02 PM
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Mercury's (Noah's?) formula for speed is:

Hull efficiency (Assume 250 for a late model V-hull)
______________________ (divided by)

Square root of:

total weight
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HP

As a base line, an 8500 vee hull with fuel and 2 passengers with twin 525 EFI (really 540HP ea +/-) with a "250" hull efficiency = 89.1 MPH (hull efficiency is a constant)

The same twin engine "Rayar powered" boat (assumes right balance) with same 1080 HP but 1000 lbs less (7500 lbs) total weight = 94.9 MPH

Maybe Raylar just needs a better marketing program...
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Old 08-23-2008 | 12:45 AM
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nice, where is raylar located?
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Old 08-23-2008 | 09:19 AM
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Originally Posted by rhsj2006
Strange thing about that boat - I wonder if it actually exists. If you look at the pictures on that site, every pic appears to be a different boat - Paint scheme doesn't match in any of the 2 pictures...

Maybe 'if you buy it, they will build it'...
Yes, that is what I suspect as well. I would love to open one of the performance magazines and see a detailed write-up on that very combination (and I'm sure you would too!) I would think if Raylar provided a sweet deal to one of the big Formula dealers, and the combintation lives up to the performance we anticipate, that would really create more interest and drive new business.
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Old 08-23-2008 | 09:45 AM
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I have been talking about these motors on here in a couple different threads...they are awesome!!
If Raylar wanted some excellent exposure they would rig my 28 Active Thunder with twins and some Imco drives and I could demo for as many customers as they wanted!!
That would be a perfect application for those 550's!
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Old 08-23-2008 | 01:56 PM
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Originally Posted by Semper Fi
Strip- the PB Mag article mentions the torque curve - at 3,000 rpm it makes 500 ft pounds of tq- it also says "with electronic variable cam timing, we can build a torque curve that's almost like a diesel engine, but with a much wider rpm range.

pretty good TQ for a sb,so it would be close to a big block
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Old 08-23-2008 | 02:09 PM
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Originally Posted by spilman
I have been talking about these motors on here in a couple different threads...they are awesome!!
If Raylar wanted some excellent exposure they would rig my 28 Active Thunder with twins and some Imco drives and I could demo for as many customers as they wanted!!
That would be a perfect application for those 550's!
Now that would be a nice package and should really fly! What does a 28 AT weigh in at? A 292 is heavy at 7500 lbs dry, although it does have twin steps...
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Old 08-23-2008 | 02:17 PM
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Originally Posted by TexomaPowerboater
That is a bad azz engine. Maybe after some more guinea pigs report good results I'd take a closer look.

You're in the perfect situation! oink oink lol
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Old 08-23-2008 | 02:55 PM
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Originally Posted by Semper Fi
However, Mercury Racing lists the HP 525 EFI at 1,152 lbs- The HP 700 SCi weighs 1,326 lbs! - (these weights are without the drives!!) The Raylar 550 is WAY LIGHTER
Unless they're making them entirely from depleted uranium, those numbers are way high. A pan-to-carb BBC weighs about 600 lbs.

Those numbers have to be drives, gimbals, and a fully-dressed engine, from exhaust manifolds to coolers, pumps, alternator, etc.
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