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Old 08-24-2008, 10:38 AM
  #21
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Talking 292 vs.28AT weight comp

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Originally Posted by 4mulafastech View Post
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...
Well, that's a great question; one that I have yet to get a definite answer from Pat on. I have not put it on the scales; plus I would be estimating my trailer weight. BUT.....if a single bbc 28AT weighs 4600-4800 dry, then I estimate my AT w/ twin sb & Bravos to be 5400-5600 dry....realistic wet weight is more like 6500#'s.
So, although it is a good bit lighter than a newer 292; w/o steps we run within 1mph @wot...I think.
I'm @ 71.5mph @ 4800. Well, I was until my port engine started knocking....not sure what I will do next.
I've recently learned how cost prohibitive : realistic results/reliability any upgrades will be;...just fix'r up and go boatin'.

Sure would love the LSM 550's though...I guess I'll start a fund...Any donations?
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Old 08-24-2008, 11:13 AM
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Originally Posted by Raylar View Post
The Formula 292 in Germany has one being installed last week and I don't have performance figures yet, but it should work wonders on an already heavy boat that came with a stock 496HO iron monster!
Sounds like things are starting to take off, which is great to hear! I saw the article in PB on the 288 Sunsation with the Raylar HO 525. A 32 with twin LSM550's will be a sweet package! Look forward to hearing about that.

BTW, the 292 is only available with twin small blocks. The 271, which was just discontinued, had the single big block.
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Old 08-24-2008, 11:24 AM
  #23
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An engine that light and powerful sounds like a great setup for a small cat(<30') and surface drives. When Skater did the 30 w/ Arnesons I thought it was a SWEET setup, but WAY pricey. These boats are very sensitive to weight, and a lighter engine mated to a lighter drive (I think the asd6 is lighter) would mean you could prop for speed without using as much hp to get the stern up. The result sounds like a really fast but nimble boat that the average offshore boater could afford.
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Old 08-24-2008, 11:28 AM
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Originally Posted by spilman View Post
So, although it is a good bit lighter than a newer 292; w/o steps we run within 1mph @wot...I think.
I'm @ 71.5mph @ 4800.
Well you are right on with your estimates! Typically I run 70-70.5 mph, but on a cool day she can see 71.5 mph. 28 pitch labbed Bravo's (1.65:1 gear) and 320HP 6.2's, stock.

Sorry to hear of your engine troubles. I know it probably makes sense to just fix her and go boating, but where is the fun in that!? Good luck with whatever you decide.
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Old 08-24-2008, 11:50 AM
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Talking

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Originally Posted by 4mulafastech View Post
Well you are right on with your estimates! Typically I run 70-70.5 mph, but on a cool day she can see 71.5 mph. 28 pitch labbed Bravo's (1.65:1 gear) and 320HP 6.2's, stock.

Sorry to hear of your engine troubles. I know it probably makes sense to just fix her and go boating, but where is the fun in that!? Good luck with whatever you decide.

I agree with the fun part; I'm a speed junkie too....but from what I'm hearing the fun will be costly and the possibility for problems will greatly outweigh the "fun-factor". (This AT28 is a huge 28' & after going 80+mph in a 17' boat it doesn't feel fast @71.)
HOWEVER, I may just fix the motor and tighten up both & install Prochargers...I'm 50/50 vs. Whipples; more $ upfront, but apparently they do the computers too and it would have to be done w/the Prochargers anyway.
BTW..I have 350magMPI's(330 crank/300prop hp) with Stainless Marine exhaust so you may have a slight hp advantage;but with the exhaust I might have 310-315 prop hp. BTw my Bravo 1's are 1.5 and props are Hydromotive QIV 26.5" pitch x 14-1/2" dia.Labbed and cut by Throttle Up.
I just would love to get to 80 for under 10k; that's my Dream!

My estimates are based on so many hours on oso! But thanks..
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Old 08-24-2008, 11:56 AM
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Cool Nice boat!

Oh Yeah...your boat is beautiful, very classy paint. My uncle has an older(86' I think) 242 w/ 260hp 5.7's. He's had for many years and I have always been fond of Formula's.
What's your fuel consumption like w/6.2's?
I typically run 3500-3800; or 4500-4600 in PR's. Get 2.5mpg all around average..
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Old 08-24-2008, 12:06 PM
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I agree with the fun part; I'm a speed junkie too....but from what I'm hearing the fun will be costly and the possibility for problems will greatly outweigh the "fun-factor". (This AT28 is a huge 28' & after going 80+mph in a 17' boat it doesn't feel fast @71.)
I completely understand. I think when taking on performance projects you just have to accept the fact that there will be 'issues' to deal with that can take the fun out of it. But when things are running right, that satisfaction can make it all worth while. One of my favorite sayings is "If it was easy, everyone would do it!"

btw, my last boat was a 110mph Talon 22, so I know what you mean about not feeling fast...
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Old 08-24-2008, 12:07 PM
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Thanks for the acknowledgement guys! We are only two years ahead of the rest of the marine engine high performance engine companies!!
The Raylar LSM550 is an awesome package as described.
The LSM550 with a Bravo HR drive and transome weighs right at 756lbs versus a 496HO at 1320lbs so I think the 500 lbs savings per motor is realistic and at about $32K with drive versus $40K plus for HP525 also has a nice price advantage for an all aluminum hand built motor with a 6,000 rpm conservative rev-limit!!
The Formula 292 in Germany has one being installed last week and I don't have performance figures yet, but it should work wonders on an already heavy boat that came with a stock 496HO iron monster!
We have two more of these babies being dynoed and broken in on the dyno'sw as we speak and they should be in their respective boats quite soon.
I think if the high performance boat market wasn't in such a down state right now we would probably have more orders than we could even handle!
We have just quoted two to Pantera for use in a new 28footer and I think there is another Sunsation customer ready to order a new 32 with the same Raylar LSM550 twin package. Both boats should be rocket ships with this power to weight ratios and the miserly fuel consumption at cruise will alsobe a big benefit with todays fuel costs.
Raylar knows that as more of these all aluminum beauties reach the market the future will speak for itself.
Just Remember that Dynamite comes in small packages!!

Best Regards,
Ray @ Raylar
It would seem reasonable to speculate that with the current fuel crisis these small blocks would be selling like hotcakes...What's up?
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Old 08-24-2008, 12:16 PM
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Originally Posted by spilman View Post
Oh Yeah...your boat is beautiful, very classy paint. My uncle has an older(86' I think) 242 w/ 260hp 5.7's. He's had for many years and I have always been fond of Formula's.
What's your fuel consumption like w/6.2's?
I typically run 3500-3800; or 4500-4600 in PR's. Get 2.5mpg all around average..
Thanks, I like your's too! As for fuel consumption, I don't get as good as you. I see 1.8-2.0 running 3500 all the way up to 4500rpm. One of the problems with the slower cruise mileage is (I believe) due to relatively high prop slip numbers at the slower speeds with the twin stepped hull. My mileage is the same running 37mph compared to 55-60 mph (less slip at the faster speeds). In the long run I would like to have more HP and turn 5-blades which should really help the cruise efficiency.
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Old 08-24-2008, 01:24 PM
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I read as much as i could find on this package and it seems like the way to go for weight savings...Even in a older boat like mine it would be worth a shot.....Plus that is a stock basline... just think if ya started to stuff some air down its throat what kind of power you would make.....
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