Naca Scoops For Opti Engines
 

For those running Opti power 250 -300 you should be aware that @ high speeds there is a Vacuum that is created on rear of engines and have seen video of mist getting drawn into air intake which is on rear of cowl . You might not think its a problem inhaling mist and maybe fresh water is maybe Ok but if you run an OPTi in salt you should be aware that your Powerhead is getting misted with corrosive salt water . Simon Motorsports recommend that a front intake is installed to break vacuum .

I manufacture several marine related items and in final tooling stages for pair of super sleek recessed ABS plastic molded NACA ducts that drop in on upper right and left of cowl on the angled section . Will keep uptaded
HERE IS YOUTUBE VIDEO :http://www.youtube.com/watch?v=Zfx6l...layer_embeddedhttp://www.youtube.com/watch?v=sV3Zo...layer_embedded

hey larry, can you come up with a naca duct to fill in the side scoops on my 36 skater? I called Skater about it and Peter doesnt have anything

Good idea,How big are the vents?

I was having the same problems with my 300XS on my 28,motors looked like rock candy after a few hrs run in the ocean.I had Shaun Torrente install popet water diverters,most of the water dumps out the side.Motors seem to be staying dry now.I would like to see what you come up with though,Motors can't be too dry:drink:

I made these NACA ducts for my old race boat and still have the mold .

As far as OPtI my new NACA ducts will be better @ force feeding fresh air very close to intake

Larry,

I am also interested to see what you come up with.

Frank ,

No problem will have tooling done this week . Anyone with an Opti is going to want a set , they are sleek and will srop in with small lip with doublle sided 3 M tape .

Here a few pics of the first ones out of mold . They are ABS plastic in will com with doulble sided 3M tape and template . A must have for anyone running an Optimax. The area in which these drop in has a complex curve and these will fit like a glove . I have many hours in tooling to insure fit

Where on the cowling do these mount?
Would there be 2 per cowling?

Yes two and they will be located in upper front section of cowl area that is angled