CMI 496 headers
 

Any more results? Seems lots are being sold, but limited info. re: real-world results.

Re: CMI 496 headers
 

I'd like to hear about some results also.....

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

Re: CMI 496 headers
 

Bryan, mind me asking what the test boat was ??

This is the first I have heard about a new ECU, Anybody else heard about this ???

Re: CMI 496 headers
 

ECU mapping not required.

Re: CMI 496 headers
 

Here's the dyno sheet!!

Re: CMI 496 headers
 

Is it just me or is the Baro pressure and relative humidity all over the map between the two dyno runs.
Just curious...
Thanks,
Dave

Re: CMI 496 headers
 

somebody just post a picture of the CMI's on a twin 496 application so that I can start drooling :D

Re: CMI 496 headers
 

The uncorrected numbers go up by 35hp, not bad. An ECU remap probably wouldn't hurt.

Re: CMI 496 headers
 

Hey Fred,
I understand that very clearly :rolleyes:
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