454 Magnum, Cam, Intake, Carb.
10-05-2010 | 08:01 PM
#11
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Joined: Sep 2008
Posts: 136
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From: Austin, TX
No need to remove the y-pipe. Just cap the ends with Fernco caps from Home depot/lowes and clamps. That way a future owner can go back to silent choice without having to pull the motor. Silent choice is an expensive option and it adds value to your boat. You actually get more flow with it installed since when in open mode exhaust is exiting through the transom and the y-pipe.
10-05-2010 | 08:38 PM
#12
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Joined: Apr 2006
Posts: 614
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From: Wenonah, NJ
No need to remove the y-pipe. Just cap the ends with Fernco caps from Home depot/lowes and clamps. That way a future owner can go back to silent choice without having to pull the motor. Silent choice is an expensive option and it adds value to your boat. You actually get more flow with it installed since when in open mode exhaust is exiting through the transom and the y-pipe.
10-21-2010 | 07:52 PM
#14
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Joined: Feb 2002
Posts: 6,656
Likes: 20
From: Lake Michigan
"what is the most HP I could get out of this motor and what would I have to do?"
550ish...Boost.
http://cgi.ebay.com/ebaymotors/Weian...item1e5ef0cd09
550ish...Boost.
http://cgi.ebay.com/ebaymotors/Weian...item1e5ef0cd09
Last edited by Back4More; 10-21-2010 at 08:15 PM.
10-21-2010 | 08:16 PM
#15
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Platinum Member
Joined: Apr 2006
Posts: 614
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From: Wenonah, NJ
"what is the most HP I could get out of this motor and what would I have to do?"
550ish...Boost.
http://cgi.ebay.com/ebaymotors/Weian...item1e5ef0cd09
550ish...Boost.
http://cgi.ebay.com/ebaymotors/Weian...item1e5ef0cd09
Hahahaha!!!!! Good one!!!! Want to stay N/A.
10-22-2010 | 12:34 AM
#17
Charter Member # 55
Joined: Oct 2000
Posts: 20,241
Likes: 2,490
From: Omaha/LOTO
Thanks for all the great info everyone. Griff can you recommend some parts to go with, to set-up this application? What cam, intake, carb size. I guess for the other parts, whoever I buy the cam from will match me up. Also found out that the stock cam is .224 Duration/ .300 lift. I quess you know too that it has rectangular port heads on this motor. As for the exhaust, it doesn't have the stainless risers that dump water at the tips. I guess I have to watch for water reversion with the duration of the cam. Thanks again.
I would use an Edlebrock Air Gap intake and a Holley 800 carb.
The stock flat tappet cam in your engine now is .510/.510, 224/224 on a 115.5 lobe sep
Imco risers for sale in this thread at a good price. Not sure if they are the longer ones, but worth checking out.
http://www.offshoreonly.com/forums/s...ne-marine.html
Last edited by Griff; 10-22-2010 at 12:57 AM.
