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CMI 496 Sport Tube

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Old 10-03-2005, 05:46 PM
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Default CMI 496 Sport Tube

Has anyone put the new CMI Sport Tube's on the 496 yet for some real world data? Boat and Results please...
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Old 10-05-2005, 07:32 PM
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Default Re: CMI 496 Sport Tube

I too am interested in any resuts. Please post some numbers!!
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Old 10-07-2005, 12:04 PM
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Default Re: CMI 496 Sport Tube

This seems to be a very elusive question for some reason
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Old 10-07-2005, 12:17 PM
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Default Re: CMI 496 Sport Tube

Yup, for all the hype leading up to their release I'm not hearing results?

I did see a post from someone with a Velocity 290 that said he gained 3 MPH.
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Old 10-07-2005, 12:27 PM
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Default Re: CMI 496 Sport Tube

Not elusive at all. There have been several posts with details.
Just received my 30 inch back, which is now a 29 wit significant modifications. Will post again once I have had a chance to try it.

My post from 9/20

I have been running them for several weeks with what I would consider fairly good results. I am running a Velocity 290, with a Bravo 1 labbed 28. Started at @ 4900 RPM, 72-73 on spedo. I am now at @5150, 76-77 on spedo, but running out of prop at times. Tried a Bravo 1 labbed 30, but it was a bit too much prop. Ran close to 4900 RPM, but speed was not there. That prop is being worked on now to hopefully allow me to run at 5050, and perhaps gain another MPH or so. Velocity hulls react very well to minimal power, so other hulls may not see the same results. If I maintain a consistent 4, I will be satisfied. I always run above half full on fuel, so that is not an issue.
Attached Thumbnails
CMI 496 Sport Tube-boat-shots-1001-011.jpg   CMI 496 Sport Tube-boat-shots-1001-004.jpg   CMI 496 Sport Tube-boat-shots-1001-014.jpg  


Last edited by Oh Deere; 10-07-2005 at 06:00 PM.
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Old 10-07-2005, 12:32 PM
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Default Re: CMI 496 Sport Tube

Great stuff. Would love to hear from more
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Old 10-11-2005, 07:55 PM
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Default Re: CMI 496 Sport Tube

The results must not be good at all if we can only get one reply to the question. Any other threads have info? I can not seem to find them
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Old 10-11-2005, 11:07 PM
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Default Re: CMI 496 Sport Tube

Quote:
Originally Posted by Oh Deere
Not elusive at all. There have been several posts with details.
Just received my 30 inch back, which is now a 29 wit significant modifications. Will post again once I have had a chance to try it.

My post from 9/20

I have been running them for several weeks with what I would consider fairly good results. I am running a Velocity 290, with a Bravo 1 labbed 28. Started at @ 4900 RPM, 72-73 on spedo. I am now at @5150, 76-77 on spedo, but running out of prop at times. Tried a Bravo 1 labbed 30, but it was a bit too much prop. Ran close to 4900 RPM, but speed was not there. That prop is being worked on now to hopefully allow me to run at 5050, and perhaps gain another MPH or so. Velocity hulls react very well to minimal power, so other hulls may not see the same results. If I maintain a consistent 4, I will be satisfied. I always run above half full on fuel, so that is not an issue.
And it looks great too.....
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Old 10-11-2005, 11:24 PM
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Default Re: CMI 496 Sport Tube

Quote:
Originally Posted by Huh-Tee-Tah
The results must not be good at all if we can only get one reply to the question. Any other threads have info? I can not seem to find them
yeah 4 MPH from a set of headers sucks.....
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Old 10-12-2005, 12:03 AM
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Default Re: CMI 496 Sport Tube

Playing with the calculator, I get something like a 48 hp increase.....
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