is it an Aero-head?
 

Now this is an aero head

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Always fascinated that the power take-off (gearbox) is at the nose end of the engine that we all know so well..... but there are a lot of ultralights out there powered by R100 engines... makes sense, when you think about it! :evil

:D

Love it! :d

The power take offs on the rear of the engine in the video (look at the oil filler) The heads are on back to front.

The one above appears to be at first glance due to the headers coming off the engine, but look closely. You can see the oil filler and timing plug on the same side of the cylinder as the headers !?!? They must've done some big time modification on that engine. That means they're using a left side head on the right side and vise versa. It also means they must've ground a custom cam to make that work. Yikes. Crazy shit.

Damn. Rob beat me to the punch by 4 minutes.

Look at which end the exhaust is coming out of the head.

???

It's coming out of the intake side.

Chris, what's your take on how they did this? They must be using a left head on the right side and vise versa, but they would've had to grind a custom cam to make this work, right?

I wanted to do the same thing to a motor for my chopper build so I found the company that makes a new 308 cam for the 79 motors and yes they flipped the pistons and heads left to right.

Theres an article here on Aero conversions. Nothing about reversing the heads though http://www.esatclear.ie/~xair/conversion.htm

As long as the cam profile is the same for intake and exhaust, you should be able to just put the cam timing 180 out.

MMM, no. You'd still have your intake openning for the exhaust stroke and your exhaust openning for the intake stroke. Putting it 180 degrees out won't change the sequence. That engine won't run.