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More HP for HP 500

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Old 09-17-2004 | 08:27 PM
  #41  
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Default Re: More HP for HP 500

Originally Posted by klaw
if you use the CMI with the flex flairs the tail pipe has some adjustability. If you buy a used set even if they are the cool collar design make sure the tail pipe connection is the flex flair design the one they make for Mercury are not.
Mine is the merc style . Flat flange ,Like a collector gasket on a car. So the little hose at the transom will not be enough ajustment
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Old 09-17-2004 | 09:07 PM
  #42  
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Default Re: More HP for HP 500

Strip Poker 388
I have a friend here in Ohio who can modify your tail pipes if you want to go that route, he is very good and reasonable. Jeff
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Old 06-28-2015 | 12:48 PM
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Im interested in doing the same thing to my rebuilt 502
Its a 502 bored 0.030 over with CMI exhausts and has 9.1 CR
Was interested in the Dart 308 steel heads cause I use the boat in salt and the 741 Cam.....
What do you guys think about this combo ????. How much HP and Torque will it make ????
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Old 06-28-2015 | 06:20 PM
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Originally Posted by louisfever
im interested in doing the same thing to my rebuilt 502
its a 502 bored 0.030 over with cmi exhausts and has 9.1 cr
was interested in the dart 308 steel heads cause i use the boat in salt and the 741 cam.....
What do you guys think about this combo ????. How much hp and torque will it make ????

575-600hp.
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Old 06-28-2015 | 09:58 PM
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I did it...

http://www.offshoreonly.com/forums/d...02-w-afrs.html

(Well, Marine Kinetics [Bob] & Unlimited Offshore Marine [Jamie] did - I just paid.)
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Old 06-29-2015 | 08:09 AM
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Here's another I found while doing a search

http://www.offshoreonly.com/forums/g...out-hp500.html
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