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murfman 06-25-2014 10:16 AM

Sedan speed question
 
What would the approximate top speed of a 27 sedan with twin 225 HP motors through Volvo out drives be?

h2oboater 06-25-2014 11:53 AM


Originally Posted by murfman (Post 4143481)
What would the approximate top speed of a 27 sedan with twin 225 HP motors through Volvo out drives be?

If the sedan is in stock condition with the Volvo drives it should run around 48 to 52 mph..

murfman 06-25-2014 12:06 PM

Thanks. It has small block Chryslers. I plan on building a pair of 350 - 400HP motors. Hoping for mid - high 60s. I know the Volvos aren't going to help, but I'm a MOPAR guy and like the small blocks

h2oboater 06-25-2014 12:22 PM


Originally Posted by murfman (Post 4143549)
Thanks. It has small block Chryslers. I plan on building a pair of 350 - 400HP motors. Hoping for mid - high 60s. I know the Volvos aren't going to help, but I'm a MOPAR guy and like the small blocks

With 400hp & stock X dim you may see 60mph with today's props. My sport has 400hp 355cu Chevy engines, & Volvo drives with a 3" raised X with 23p Mirage props, I only run 68 to 70mph on Jeff Hall's GPS.

27sedan 06-25-2014 12:29 PM

My sedan has 2x250 hp at the prop with bravos. I do a solid 65. let's see some pictures.

murfman 06-25-2014 12:35 PM

68-70 would make me very happy. With the easy availability of 4" Stroker cranks I can build easy 402 Cu In motors with Indy iron heads and make 400HP. I was already thinking about the 290 transoms to get trim so raising the X is not out of the question either.

murfman 06-25-2014 12:44 PM

http://i184.photobucket.com/albums/x...ps16e31689.jpg

http://i184.photobucket.com/albums/x...ps5730db55.jpg

http://i184.photobucket.com/albums/x...ps3a3180ba.jpg

It's definately a project bits it's all original and not hacked up

h2oboater 06-25-2014 01:37 PM

5 Attachment(s)

Originally Posted by murfman (Post 4143570)
68-70 would make me very happy. With the easy availability of 4" Stroker cranks I can build easy 402 Cu In motors with Indy iron heads and make 400HP. I was already thinking about the 290 transoms to get trim so raising the X is not out of the question either.

I would just make your own power trim using Merc OB trim cyl & Merc pumps it's simple & easy if you feel you need power trim rather than changing the drives to 290 Volvo drives. I have this trim set up on the X-18 Donzi works great, been making them for my boats since 1976. On my sport I dont have any need for power trim, I just keep it on the second pin, I get all the speed I need. I like to keep things simple..

murfman 06-25-2014 09:29 PM

How didraising the X affect the performance of the boat aside from
Top speed? Did it change the planing or handling characteristics at all? Does it still pull out
Of the hole well? I don't want to give up other areas just to gain top speed. If it does not make a big difference in other places I'm all for it

olredalert 06-26-2014 08:17 AM

----Ive seen H20s trim set-up and it really slick........Bill S


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