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shreddr's Avatar
 
Join Date: Jun 2006
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Where does HP come from?

Stupid question, right? I am trying to figure out what to do next on my R11 (tinkering is half the fun) and I am thinking about ways that would generate more horspower the list seems something like this: 1. more displacement (all else being equal), 2. more fuel charge per piston stroke (i guess this is only correct as long as all of it is burning), 3. more energy per volume of petrol (I am not talking octane, but higher energy chemical bonds, nitro-methane etc) or 4. all of the above. This seems to be about it.

So as i chase extra horsepower I either need to go with the big bore kit (kind of pricey) or figure out the best way to get more mixture into the cylinders (cam, bigger valves, bored throttle bodies, milled heads) of course this will need a chip to take advantage of the changes.

The second option seems a bit more affordable, except for the cams (Omex at $795!, how important is this to the package?) If I wasn't afraid of blowing the jugs off I would just go with nitro and be done with it.

Once again I ask the collective expert Pelican opinion!

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Old 05-31-2007, 04:32 PM
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Old 05-31-2007, 04:50 PM
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You could always Turbo it.
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Old 05-31-2007, 06:35 PM
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from what I've read on this board ...the HP gains to be had from this engine are minimal unless you drop serious ducets. The HP / $ ratio apparently is not favorable. EZ Rider put the larger jugs on his and gained some nice numbers IIRC, but it weren't cheap.

Oh and as far as where the HP comes from , I think the stork brings it. Or maybe its somethin like TorqueXRPM or some silly engineering stuff like that.

Rog?
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Old 05-31-2007, 07:21 PM
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seven pounds equals one horse power.
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Old 05-31-2007, 09:08 PM
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varmint's got my line of thinking, DIET!
you get $saving and HP gain (relatively speaking of course), any other method will cost you $. If you drop say 60lbs (that's alot of fat), you'd have gained 10hp =10% gain! you'd prolly save $100's and $1000's.
unless you are already skinny bones,
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Old 05-31-2007, 10:32 PM
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Either get lighter wheels, or buy a turbo for 140rwhp.
Old 06-01-2007, 12:37 AM
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140 Horse would be nice, lets hear about the turbo,,

Reminds me of Max Rugatansky looking at the blower in the New
Police Interceptor, which the Main Force Patrol used to keep him interested in chasing meth heads.

I've heard used 1200 Ss are selling for 11K maybe thats better use of the ducets.
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Old 06-01-2007, 02:20 AM
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less weight, you need CF wheels
Old 06-01-2007, 05:47 AM
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Has anyone besides me noticed that the trellis frame on the R12S looks very similar to that of the Ducati 900SS. Have the Germans and the Italians formed another alliance?
Old 06-01-2007, 06:24 AM
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Thought I'd put up som pics for you to examine. Would really like shots of frames only.



The engine becomes an intergral part of the frame in both instances.
Old 06-01-2007, 06:46 AM
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They are very different. No part of the BMW rear frame that holds the rear shock, seat and pipes.............. touches the frame part that holds the front wheel to the bike. In the old design Ducati........the frame cages the whole engine..........and the front forks holder is attached to the rear frame and suspension holder.

These frames look a little alike........but thats all.........BMW frame is very modern.
Old 06-01-2007, 06:34 PM
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Well spoken Dr. C

Old 06-01-2007, 06:46 PM
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