Nizpro Marine's 633-Horsepower Supercharged Yamaha

[Scream And Fly]

Nizpro Marine created this 633-horsepower supercharged monster, and You all need to check this out because I am blown away. They focus on upgrades and modifications to Yamaha outboards and they developed the superchargers for those engines entirely in-house. The engineering involved is phenomenal. Here's the description of the 633R from their YouTube page:

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Nizpro Marine has developed the worlds most powerful outboard.

You start with Yamaha’s brilliant, and dare we say venerable 4.2l V6. You add a custom plenum (hence the red alien), separate, additional raw water cooling, and Eaton’s R1900 supercharger on top. Yet the really brilliant effort is in the re-map of the factory brain.


Now the 633RR adds a bigger pulley, new injectors, forged pistons, new valve springs, ported heads, and billet conrods, then some other more incidental bits too like throttle body and injectors, as well as a new drive leg. All very cool stuff, and the reason the whole thing is as bullet proof as the standard 300hp from Yamaha.

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[hellbents-10]

I think the total weight comes in close to the 450R like this. What a power house! I do wonder how the lower unit handles the big power!

[jmatak9]

yes!!!

[JPEROG]

Maybe they will be bolting a new merc. sportmaster to it.--impressive for sure.

Joe

[mr fun]

$ ? $ ? $$$ ?

[Tcatrett]

Bad A$$!!! Looks like it will be hard on equipment.

[Turtleherder]

Found a write up that said, as per Nizpro, it weighs 591 lbs. and produces 490 ft lbs of torque. It also said the lower is rated to 650 ft lbs of torque and you can get 1:35 or 1:50 gears.