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Originally Posted by HaxbySpeed
(Post 3570578)
If you bump your budget up to about 12k per side I can hook you up with LS3's 450hp, all aluminum, closed cooled, turn key ready to go..
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Originally Posted by Philm
(Post 3570060)
AMT made a twin small block powered 30' cat that ran right around 105mph with twin 390hp SBC. Set up on drivelines. From what i understand they only made one, but also based on the reviews of it, it ran pretty well for that power package. They were from PCM engines, originally the ZR6 package, now they are called the ZR409.
I know that Arnaldo at Predator will build you the same boat, since they have the AMT molds now. That is one of my ideas for a new boat. |
They are EFI and drive by wire, they can run analog or digital dash. They come with aluminum exh. manifolds. CMI's are available for a significant upcharge and not worth it in my opinion.
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Originally Posted by Originalronza
(Post 3570585)
That sounds like a hell of a package, that is smoking fast for that power. What drives were used? Was there an article on this boat.
The boat had IMCO SC's with SC lowers. Sitting on IMCo extension boxes. I already talked to Predator about building me one, Arnaldo said no problem, small blocks or big blocks, up to me. http://i690.photobucket.com/albums/v...006sport02.jpg http://i690.photobucket.com/albums/v...006sport09.jpg http://i690.photobucket.com/albums/v...006sport05.jpg |
Originally Posted by Philm
(Post 3570591)
There was an article in Powerboat, back in '08 i believe. You can buy the article from Powerboat magazine, $3.99
The boat had IMCO SC's with SC lowers. Sitting on IMCo extension boxes. I already talked to Predator about building me one, Arnaldo said no problem, small blocks or big blocks, up to me. http://i690.photobucket.com/albums/v...006sport02.jpg http://i690.photobucket.com/albums/v...006sport09.jpg http://i690.photobucket.com/albums/v...006sport05.jpg |
Originally Posted by Mad Mac
(Post 3570097)
:lolhit: ignorant SOB arent you, seams to me I know quite a few 110+mph 30' and 28' cats with twin 300HP egg beaters that will run. I think you need to start reading a little about the subject HP to weight ratio. The Ls engines that the others have mentioned are putting up bigblock power without the weight.
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Hax--what exhuast you using ?
Who makes best exhuast for LS3/LSx besides cmi for reasonable $$ the 406sbc is a killer motor for the $$ and HP...500hp all day long for cheap. |
Originally Posted by Originalronza
(Post 3570617)
Cool looking boat, would love to put their 550hp motors with some arnesons, bet you would be in the 130-140mph range on modest reliable power. Or maybe ilmors new 550s what a package.what kind of price would you be looking at on this boat and motor package?
I would figure that the lowest you could get out the door would be in the $160k range for a brand new custom 30' cat.:coolcowboy: Someday.....:evilb: |
Don't forget, Ilmor has two small block MV8 engines from our new line with over 400hp - the all aluminum 6.2L at 430hp and the performance-based 7.4L at 522hp. Check them out at: http://www.ilmor.com/en/marine/recreational/
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you are going to limit out those small blocks pretty quick and start to lose reliability.... Just the CMI on the LS engines start at 4k!
Stick with big blocks! Depending on the boat, the weight might actually help keep it settled at speed.. If you had Merc 454/502's you can rebuild them to 500HP+ for cheap and kill the small blocks and be super reliable! Then down the road.... convert you Big blocks you invested a little money into and add some blowers, now you are talking the speeds you are wanting to reach! Twin 400hp in a 30 cat is likely to only go 85+? ....depending on the boat and the set up of course. Inboards and outboards are playing different games so you really can not compare... Another thing to consider is, it depends on the boat how fast it wants to go.... Not all boats are created equal and there is no exact equation to HP vs Speed! Eric |
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