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Member
 Originally Posted by niceguyeddie
Looks great!
Are those the IMCO removable mufflers? I head they work well but impede a lil horsepower so they're not very common on big Hp boats.
Not IMCO's. They look like Zoomers. We used them in the past. The "propeller" is restrictive and costs HP. We've removed them and made gains, but increases the noise level quite a bit. The IMCO mufflers are way less restrictive.
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Senior Member
 Originally Posted by B&D Marine
Not IMCO's. They look like Zoomers. We used them in the past. The "propeller" is restrictive and costs HP. We've removed them and made gains, but increases the noise level quite a bit. The IMCO mufflers are way less restrictive.
Thanks for the info. Have you compared them on the dyno?
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Member
 Originally Posted by niceguyeddie
Thanks for the info. Have you compared them on the dyno?
I have not as it would be almost impossible to duplicate the exhaust, load, etc. as installed in a boat. I did a comparison on the lake. Zoomers with "propeller" 5300 rpm's, without "propellers" 5500, IMCO Gatlins 5625, no mufflers 5800. 540 BBC EFI 725 HP @ 6000
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Member
 Originally Posted by niceguyeddie
Thanks for the info. Have you compared them on the dyno?
I have not as it would be almost impossible to duplicate the exhaust, load, etc. as installed in the boat. Zoomers 5400 rpm's, Zoomers without "propellers" 5525, IMCO Gatlin's 5650, no mufflers 5800. 540 BBC 725 HP @ 6000.
Last edited by B&D Marine; 12-25-2013 at 10:49 PM.
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Senior Member
 Originally Posted by B&D Marine
I have not as it would be almost impossible to duplicate the exhaust, load, etc. as installed in the boat. Zoomers 5400 rpm's, Zoomers without "propellers" 5525, IMCO Gatlin's 5650, no mufflers 5800. 540 BBC 725 HP @ 6000.
Edit: I went back and looked at the results and changed a few numbers. Not sure if I was able to delete the first post if it shows up twice.
Nice thanks for the info.
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Looks great Steve! Sue is a lucky lady.
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Senior Member
 Originally Posted by 82daytona
Looks great Steve! Sue is a lucky lady.
thanks, still hav'n run the boat yet
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Senior Member
 Originally Posted by 2FORCEFULL
thanks, still hav'n run the boat yet  
Get her wet,,, no excuses,,,,,the excuse for the water level doesn't count. It has been REAL NICE out there, no problems at the ramps at Windsor, I have seen larger boats put in with no problems.
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