Superbabi !! Heres your pics of your Y2K
02-12-2007, 01:48 PM
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Well T, Dana is claiming +48HP for the 375HP 496Mag and +43HP for the 425HP 496MagHO on the dyno at Raylar...
http://www.offshoreonly.com/forums/s...d.php?t=150193
I changed to Stainless Marine manifolds from the cast iron exhaust on my 310HP/7.4MPI the second year I had my boat. I saw a 200rpm and 2mph increases with the same prop. That was probably 25-30HP. Your engine has better exhaust stock than that one did though.
http://www.offshoreonly.com/forums/s...d.php?t=150193
I changed to Stainless Marine manifolds from the cast iron exhaust on my 310HP/7.4MPI the second year I had my boat. I saw a 200rpm and 2mph increases with the same prop. That was probably 25-30HP. Your engine has better exhaust stock than that one did though.
02-13-2007, 12:03 PM
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02-13-2007, 02:46 PM
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02-13-2007, 03:13 PM
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Patrick
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02-13-2007, 05:24 PM
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02-13-2007, 05:49 PM
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We are never done looking for more speed...
IMO the first thing to do with your 496 is to modify or change your exhaust.
Talk to Raylar about the CNC porting program they have for your existing manifolds and the testing they have done with the new Dana exhaust for the 496 engines.
I believe that there is 30 to 50HP to be gain with exhaust mods/changes alone...
Raylar seems to be the best source for upgrades on the new 496cube engines.
IMO the first thing to do with your 496 is to modify or change your exhaust.
Talk to Raylar about the CNC porting program they have for your existing manifolds and the testing they have done with the new Dana exhaust for the 496 engines.
I believe that there is 30 to 50HP to be gain with exhaust mods/changes alone...
Raylar seems to be the best source for upgrades on the new 496cube engines.
I believe CMI has headers for a 496, which boost HP by 60. Raylar has aluminum heads for a 496 along with a cam and a few other goodies. Their claiming something like 575 with their full package. Who's the guy up the Hudson who whippled his 496. Did 81 out of the box, and after dialing in does 84. Thats cool for a 496. And that motor has been running for a few years.
02-13-2007, 08:44 PM
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Cary, he has the black and white Y2K with the 496. His boat was the cover boat from the Superboat on line pages.
02-14-2007, 04:29 AM
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