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06 Mach 22 w/2.5 Drags
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Discussion Starter · #1 ·
I was told a little while back that the Bob's cowls heavily restrict the air-flow into the motor. Can anyone confirm or deny this? At a glance, there is a possibility I may agree. There are only like 4 little holes on the cowl allowing air flow. Should I open them up a little bit and get some more air in there??
 

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the silver bullet!
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are you talking about the motor cowling ?????,i thought you had merc cowlingswhat the hell is a bobs cowl !!i've heard of bobs lower units but not cowlings !!!TUNNEL T
 

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06 Mach 22 w/2.5 Drags
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200 Posts
Discussion Starter · #3 ·
are you talking about the motor cowling ?????,i thought you had merc cowlingswhat the hell is a bobs cowl !!i've heard of bobs lower units but not cowlings !!!TUNNEL T
Yup. Bob's Marine made a cowl for the older 2.5s that makes them look as the later models do.
 

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I put a set of Bobs alien cowl on my old Silverwing.Nice cowls but yes you need to cut bigger holes.Ive seen guys cut that hole area where the two 1' holes are big enough to put your hand in and then drill some 1/2 inch hole in the back.some kind of pattern that looks good.
 

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06 Mach 22 w/2.5 Drags
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200 Posts
Discussion Starter · #5 ·
I put a set of Bobs alien cowl on my old Silverwing.Nice cowls but yes you need to cut bigger holes.Ive seen guys cut that hole area where the two 1' holes are big enough to put your hand in and then drill some 1/2 inch hole in the back.some kind of pattern that looks good.
Good call. I'm gonna do it. You think its worth putting a few directly in front of the intake itself?
 

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No dont put any more in the ft and Id try it without drilling in the back first and see.What motors are they.
 

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06 Mach 22 w/2.5 Drags
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200 Posts
Discussion Starter · #11 ·
What about fuel milage
HAHA, shit. I try hard to not pay attention to that one. I don't think I saw any loss. Usually on an average day Ill suck down roughly 50 gallons which is exactly what I did on this weekend. So I think its really about the same efficiency. Which isnt much! :D
 
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