Offshoreonly.com - Naca Scoops For Opti Engines

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these came out really nice Larry, and the colour blends nicely too!

I will need 2 sets also

Quote:

Originally Posted by KEVLARKAT32 (Post 3516885)

more pics

The Naca ducts look nice.I had Shaun Torrente install the popet water diverter on my motors.The water dumps out the side,No more water on the engine,and with the new tuner ,lightened flywheels,motors sound like 2.5s. When I picked up my skater from STR,took it to Sanibel & ran my Skater for 2weeks in the Gulf.No water at All,checked the cowlings daily.Before STR......, water in drives,on motors,top speed 105.Now.....No water in drives,no water on motors......cruise at 5,000 90 - 92mph WOT 6,300 115+ Thanks again for the referall to STR!

I just took delivery on my 375 HP EFI strokers . I have heard from many people including Dav Bush that the Opti will pick-up 2-3 MPH with coel removed proving that the stock rear entry air inlet is restrictive and my scopps will deliver cool fresh air right next Plenum

Quote:

Originally Posted by offshoresteve (Post 3478753)

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:

Quote:

Originally Posted by KEVLARKAT32 (Post 3517816)

I dont know how restrictive it is,as a stock motor Sucks spray in.2-3mph is huge,since I actually Run my boat I will try it and let you know.I would not run like,that daily.... I am NOT Knocking your ducts you did a great job,looks factory,just letting people know there are other options,that add HP and stop the spray.Shaun told me your motors are 350 not 375....My 300XS came in about 335 according to Shaun.

I have since decided to go with pair STR 4 inch throttle body , should be well above 350 hp . Only running these for a season an then swapping in pair Opti powerheads

Quote:

Originally Posted by offshoresteve (Post 3517820)

Offshore Steve, just curious do you have any air mods to your cowlings or are they stock?

Quote:

Originally Posted by KEVLARKAT32 (Post 3517832)

I have since decided to go with pair STR 4 inch throttle body , should be well above 350 hp . Only running these for a season an then swapping in pair Opti powerheads

Those should work well.Shaun wanted me to wait till I had put some time on the current mods for a baseline.Larry ,I wish I had your Tallent,what you have done with that old 32 is Amazing!!Cant wait to see the performance#s,when do you plan on splashing her?

Thank you !! I'm hoping this spring but to be honest I'm very tired and out of money .

Larry

Quote:

Originally Posted by Double Rigged (Post 3517841)

Offshore Steve, just curious do you have any air mods to your cowlings or are they stock?

Yes I heavily modified.........I pulled out the top insulation:drink: No seriously the popet water diverters stoped the water on the motors for me & it looks cool when you take off and it throws large stream of water to port and starboard of the boat.I will install the Larry Naca Ducts as well,cant have too much AIR!