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Rennsport motor

Posted: Wed Sep 14, 2011 12:52 pm
by twist
rennsport_copy_2.jpg
rennsport_copy_2.jpg (132.85 KiB) Viewed 1721 times
While browsing through one of my books I found this mechanical rendering of a BMW motor with gear driven valves. A "Rennsport". I never heard of this before. Looks like it would be kind of like a Ducati system but MUCH heavier.

Re: Rennsport motor

Posted: Wed Sep 14, 2011 1:12 pm
by Deleted User 287
If you have had this airhead obsession long enough, you will eventually find out about BMW's racing bikes.
They did especially well in sidecar racing.

That almost looks like something out of John Muir's (the other John Muir) How to Keep Your Volkswagen Alive:

Image

Re: Rennsport motor

Posted: Wed Sep 14, 2011 1:19 pm
by Major Softie
Mmmmmmm, Kompressors....

c/o rockerboxer.com

Posted: Wed Sep 14, 2011 8:16 pm
by vanzen
Image
Image
Image
Image

Re: Rennsport motor

Posted: Wed Sep 14, 2011 8:45 pm
by Deleted User 287
Image

Re: Rennsport motor

Posted: Wed Sep 14, 2011 9:55 pm
by vanzen
justoneoftheguys wrote:PORNOGRAPHY
OK. And just how familiar are you with your pornography ?

Which of those pics are of engines actually built by BMW ?

Re: Rennsport motor

Posted: Wed Sep 14, 2011 10:27 pm
by Deleted User 287
vanzen@rockerboxer.com wrote:just how familiar are you with your pornography ?
Oh, me and pornography go way back... :lol:

I haven't a clue about the origins of those engines. I always thought the elite at BMW built them.

Re: c/o rockerboxer.com

Posted: Wed Sep 14, 2011 10:49 pm
by melville
vanzen@rockerboxer.com wrote:Image
Yowza! Four valves, roller rockers, and a single lobe cam. I'm seeing "FM" (???) on the bellhousing???

In answer to your question, I believe the second, third, and fourth pix are of BMW origin. Second one is prewar?

Re: Rennsport motor

Posted: Wed Sep 14, 2011 11:42 pm
by lomax
This is just Cool, I don't care who you are. :D

Marc

Re: Rennsport motor

Posted: Wed Sep 14, 2011 11:57 pm
by Chuey
I think my favorite part is the copper tubes for oil squirters.

Chuey