Motorav VW-based Engine

Brazil's Motorav is showing the latest version of their VW-based aircraft powerplant. There are so many differences that the VeeDub link is very thin indeed.

The dual plug heads are a good example, they include individual valve covers (which don't leak!) and hydraulic valve lash adjustment. The case is also proprietary. Note the relocated oil cooler; remote coolers are also available. Ignition is dual electronic. Fuel metering is via an updraft throttle body injector. All in all, a very nice unit.

Dan Horton

Dan Horton says he is "just a homebuilder." He has been a pilot more than 30 years and currently flies a custom RV-8.

11 Replies to “Motorav VW-based Engine”

  1. Finally, proof of what can be done if you use a custom case instead of using an ancient AS-41 based one....Revmaster Aviation needed to do this decades ago....if they did this power plant would have been HUGE and in many more aircraft than now.

  2. Better late than never. Evolution of that design seemed inevitable, but wondered if it was going to happen. It looks like a lot if good aero-speficic improvements. Thanks for the story Dan, waiting for the"rest of the story" in a future issue of KP. Keep up the good work.

  3. One of the first modifications many VW Beetle and Microbus owners did to their engines was to relocate the oil coolers so cylinder #3 ran cooler. It looks to me like this problem still exists with this engine! No thanks!

  4. I've seen this motor at SNF and OSH for many years, but doesn't seem any closer to being a saleable product. Any updates on reality of being available for sale?

  5. With the oil cooler in the front of the engine (behind the prop) and turned downward, there's more fresh air available to cool the rear cylinders. This is what the performance VW engines use to keep cool.

  6. Re past S&F/OSH appearances, Motorav had (or was working toward) a US distribution agreement with a group in Birmingham Alabama. The deal fell apart for unknown reasons. Expect more in Kitplanes later.

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