Camshafts and High Comp Pistons

moose · Post by **moose** » Wed Aug 08, 2007 7:40 pm

Does anyone have experience with performance camshafts or switching the stock ones for RT/RS cams. How about high comp pistons? Any feedback would be appreciated.

moose · Post by **moose** » Wed Aug 08, 2007 7:43 pm

I fixed my spelling!

Post by **DJ Downunder** » Wed Aug 08, 2007 7:52 pm

Lots of info here... http://www.moto-one.com.au/ ...Click on the BMW roundel..then click on "News"..then click on "Bike not quick enough?".

DJ

riceburner · Post by **riceburner** » Thu Aug 09, 2007 2:14 am

I've seen what the following list can do to a GS - turn it into a bona fide rocketship!

RT cams
RT inlet manifold
K1200RS fuel pressure management box
polished head
Laser system + chip

Met a bloke with the above mentioned (and probably a few more things done) on his 1150GS and it was about 20 -30 mph quicker on the flat than my Rockster, I was solo, he had a LARGE pillion on board!

fnfalman · Post by **fnfalman** » Thu Aug 09, 2007 10:42 am

High pressure pistons are available from San Jose BMW and they aren't cheap (close to $400 per piston).

It's on my to-do list but not too high on it. Maybe next year I'll figure out how to hotrod the Rock some more - intake snorkel, cam, pistons, valves. Maybe even turbo.

Post by **boxermania** » Fri Aug 10, 2007 8:02 pm

The boxer is a pretty sturdy engine, the easiest way to increase HP is via turbocharging. Since the compression is already on the high side, I don't see being able to run anymore than 5 o 6 pounds boost.

With 6 pounds of boost the engine should produce, including losses, produce around 115-120 hp at the crank, or about 95-100 hp at the rear wheel.

This HP level would be about the same as that of an R1200R, however the turbo bike will have gobs of torque down low and that will make it significantly quicker off the line.......the engine will take the boost, you would have to be extremely carefull with the clutch, a kevlar unit with a matching pressure plate will definitely be in the future.

The cost will be significantly less than the price of a new R1220R..

Post by **OU812** » Sat Aug 11, 2007 10:23 pm

boxermania wrote:The boxer is a pretty sturdy engine, the easiest way to increase HP is via turbocharging. Since the compression is already on the high side, I don't see being able to run anymore than 5 o 6 pounds boost.

With 6 pounds of boost the engine should produce, including losses, produce around 115-120 hp at the crank, or about 95-100 hp at the rear wheel.

This HP level would be about the same as that of an R1200R, however the turbo bike will have gobs of torque down low and that will make it significantly quicker off the line.......the engine will take the boost, you would have to be extremely carefull with the clutch, a kevlar unit with a matching pressure plate will definitely be in the future.

The cost will be significantly less than the price of a new R1220R..

How/where do we get the Turbo unit?

Post by **OU812** » Sun Aug 12, 2007 6:57 pm

I am waiting.........

riceburner · Post by **riceburner** » Mon Aug 13, 2007 5:51 am

I'd rather have a super-charger....

mad1150 · Post by **mad1150** » Mon Aug 13, 2007 5:51 am

This looks a little old, but at least its a place to start.

http://www.rbracing-rsr.com/bmwR1100.html

Go back to: http://www.rbracing-rsr.com/products.htm

Lots of interesting stuff!

Post by **boxermania** » Mon Aug 13, 2007 8:38 am

ou812.....

Sorry for the delay, RB Racing has been working on one for awhile now.

However Chris Hodgson of SJBMW (San Jose BMW) had a kit for an R1100S that they sold through the dealership. Another potential supplier is Mr. Turbo, although they primarily deal with Suzukis and Kawas.