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Re: Rennsport motor
Posted: Thu Sep 15, 2011 12:00 am
by Chuey
Somehow, I don't see BMW putting the exhaust in the back and the intake in the front.
Chuey
Re: Rennsport motor
Posted: Thu Sep 15, 2011 12:07 am
by Deleted User 62
Chuey wrote:Somehow, I don't see BMW putting the exhaust in the back and the intake in the front.
Chuey
I think what you are seeing is the business end of the turbocharger.
Re: Rennsport motor
Posted: Thu Sep 15, 2011 12:11 am
by mattcfish
So where is the R100 version? What sort of power did these put out compared to stock engines of the time?
Re: Rennsport motor
Posted: Thu Sep 15, 2011 12:15 am
by Deleted User 62
mattcfish wrote:So where is the R100 version? What sort of power did these put out compared to stock engines of the time?
Gotcher R100 version right here: Krauser 4v heads
... and looking to the future, the R1 prototype:
Re: Rennsport motor
Posted: Thu Sep 15, 2011 10:36 am
by Major Softie
Well then, all the Oilhead variants would be part of that as well.
Re: Rennsport motor
Posted: Thu Sep 15, 2011 11:54 am
by vanzen
Tim Shepherd wrote:mattcfish wrote:So where is the R100 version? What sort of power did these put out compared to stock engines of the time?
Gotcher R100 version right here: Krauser 4v heads
But K4V heads are pushrod-activated, not bevel driven !
Design: Fritz von Apfelbeck, Fabrication: Werner Fallert. 1978
Featues: 4 valves, bevel drive, magnesium crankshaft housing crankshaft. 120 HP.
Turbocharged or
kompressor ?
KOMPRESSOR it is !
Both above images are of a replica RS54 engine
hand-built by Heinrich "Henry" Dirrigl.
Three were built. The pictured DOHC is owned by Tom Bridgers.
Dave Percival owns the other 2 (one a DOHC, the other a SOHC) that Henry built.
Re: Rennsport motor
Posted: Thu Sep 15, 2011 12:33 pm
by mattcfish
vanzen@rockerboxer.com wrote:Tim Shepherd wrote:mattcfish wrote:So where is the R100 version? What sort of power did these put out compared to stock engines of the time?
Gotcher R100 version right here: Krauser 4v heads
But K4V heads are pushrod-activated, not bevel driven !
.
Pushrods...exactly.
Re: Rennsport motor
Posted: Thu Sep 15, 2011 12:54 pm
by vanzen
mattcfish wrote:
Pushrods...exactly.
... and a rather complex pushrod "system" at that.
Re: Rennsport motor
Posted: Thu Sep 15, 2011 4:35 pm
by mattcfish
I like the fact that no chains are used anywhere. Still trying to determine how the shafts to the heads are driven.
Is that roller bearings on the con rods? A few things could be updated, but I guess the question is, why didn't this sort of design go into production? Seems to be way ahead of it's time.
Re: Rennsport motor
Posted: Thu Sep 15, 2011 4:53 pm
by Garnet
mattcfish wrote: A few things could be updated, but I guess the question is, why didn't this sort of design go into production? Seems to be way ahead of it's time.
There where several English bikes with bevel drive OHC, the Norton Inter (Manx) be the most famous. Ducati did it all through the 60s and 70s but had problems at high revs.
Bevel drive is VERY expensive to build and re-build as there are many close tollerances that must be met.