CMI 496 headers
06-08-2006, 02:39 PM
#3
Donzi33ZX
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Re: CMI 496 headers
The January SpeedBoat magazine has an article on this topic.
Save 28 pounds per motor in weight.
Claimed peak per engine 80 HP, average numbers were 55 HP.
$4100 gets one set and a new ECU according to this article.
Test boat gained 3 mph on a single engine application.
Bryan
Save 28 pounds per motor in weight.
Claimed peak per engine 80 HP, average numbers were 55 HP.
$4100 gets one set and a new ECU according to this article.
Test boat gained 3 mph on a single engine application.
Bryan
07-01-2006, 06:15 AM
#6
Member #9
Charter Member
Re: CMI 496 headers
somebody just post a picture of the CMI's on a twin 496 application so that I can start drooling 
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07-01-2006, 09:55 AM
#8
Re: CMI 496 headers
Originally Posted by TRICK
Dave,
I believe that's why you see Corrected Torque and Corrected Horsepower. The dyno adjusts to remove weather from the equation.
I believe that's why you see Corrected Torque and Corrected Horsepower. The dyno adjusts to remove weather from the equation.
I understand that very clearly
It just seems that with the Baro and Humidity on the second run that they were testing it out in the rain???
Just trying to understand.
It seems that it would take no more than 1/2 hour to swap the headers on the dyno so why not back to back?
BTW, the custom tailed platniums worked out perfect on the Bulldog.
Thanks,
Dave
07-01-2006, 10:23 AM
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Re: CMI 496 headers
Dave, I was wondering about that humidity too. However, I plugged all the numbers into my dyno correction tables and it doesn't make much difference, maybe 1/2% correction. The low Baro accounts for 2% more correction. Must of been one hell of a rain storm that came through on that test...LOL. It's nice to see a dyno sheet with all the data, for us analytical types. The raw numbers are impressive though, and the second run would warrant about 2.5% additional correction than the stock run. Are these the runs that Tyler Crocket did or a seperate test?
07-01-2006, 04:28 PM
#10
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Re: CMI 496 headers
A dyno run can say anything, back to the original question of this thread, any more real world results out there, that's all that matters. Would love to hear.
