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Old 02-11-2011, 04:25 PM
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RodKnock RodKnock is offline
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Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
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Quote:
Originally Posted by KevinM View Post
Blitz,

Your motor probably makes around 750 HP on an engine dyno with open headers. The sidepipes on these things are actually very inefficient in spite of how loud they are.

There have been a number of members here who have dynoed their high horsepower cars with and without the sidepipe mufflers. The usual power loss from the mufflers is in the 100 to 150 HP range.

Kevin
Let's not get carried away here. Does Dan's Kirkham have the new Cammer heads? How many 482's have dyno'ed at 750 HP? Zero, that I'm aware of. How many 482's have been dyno'ed over 700 HP? Zero, that I'm aware of.

Gary Sharapa has written that his Cobra with a Keith Craft 496 and a SOLID ROLLER cam made 523 rear wheel HP, 681 HP at the flywheel.

http://clubcobra.com/forums/showthread.php?t=107770

What cam and heads does Dan have on his Kirkham? If the shop claims 550 rear wheel HP, then what the heck is in there?