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Build your own supermono engine?

Started by TAftonomos, February 24, 2010, 01:28:20 PM

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Speeddog

#15
February 27, 2010, 07:23:27 AM
Quote from: brad black on February 26, 2010, 01:21:56 PM
to get 7 pound boost (1/2 atmosphere) you'd need 50% more capacity on the other cylinder.  which means about 22.5% bigger bore.  not sure how you'd get that in.  and that assumes 100% vol efficiency.

or am i missing something.

You get two strokes of your supercharging cylinder for each intake stroke of your power cylinder.
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Punx Clever

#16
February 27, 2010, 07:51:28 AM
MrI gave me an idea... maybee you'd like to see a four-bar rear suspension.
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MotoCreations

#17
February 27, 2010, 08:17:17 AM
If you did mono engine -- you only need one FCR then!

As for moving the engine forward?  New frame required.  It would allow a longer swingarm and one could still shorten the wheelbase quite a bit.  I looked at using one of the http://www.biggelaar-performance.com/ kits at the time with special crankshaft (in a 998 engine) for a special project I wanted to build -- but used a different engine eventually due to time constraints.

brad black

#18
February 27, 2010, 11:17:15 AM
Quote from: Speeddog on February 27, 2010, 07:23:27 AM
You get two strokes of your supercharging cylinder for each intake stroke of your power cylinder.

yes, well, i'll just go sit at the back.  knew i was missing something.
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Speeddog

#19
February 27, 2010, 11:23:19 AM
Quote from: brad black on February 27, 2010, 11:17:15 AM
yes, well, i'll just go sit at the back.  knew i was missing something.

No worries, I fell in the same trap the first time I was thinking about it.  :P
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~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

ducatiz

#20
February 28, 2010, 03:37:57 AM
Wouldn't the timing of the strokes be a problem or would the intake manifold have to be unidirectional.  Seems something has to hold at least one stroke of intake air in place until the hot cylinder needs it
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ducpainter

#21
February 28, 2010, 03:54:59 AM
Quote from: ducatiz on February 28, 2010, 03:37:57 AM
Wouldn't the timing of the strokes be a problem or would the intake manifold have to be unidirectional.  Seems something has to hold at least one stroke of intake air in place until the hot cylinder needs it
wouldn't the intake valve on the working cylinder do that?
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Speeddog

#22
February 28, 2010, 09:17:33 AM
The supercharging cylinder is just a compressor, and as such would have check valves instead of cam-operated valves.

Definitely works better with a plenum.

More details on one here:
http://thekneeslider.com/archives/2009/01/12/ducati-v-one-twin-to-supercharged-single-conversion/

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Reseda, CA
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~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

ducatiz

#23
February 28, 2010, 11:26:47 AM
Quote from: Speeddog on February 28, 2010, 09:17:33 AM
The supercharging cylinder is just a compressor, and as such would have check valves instead of cam-operated valves.

Definitely works better with a plenum.

More details on one here:
http://thekneeslider.com/archives/2009/01/12/ducati-v-one-twin-to-supercharged-single-conversion/



QuoteThe 498cc single has 15 HP more than the original twin putting out 102 HP at the rear wheel, torque is increased and it runs fine to 10,000 rpm, 2500 rpm over stock. It's about 30 HP more than the well known Ducati Supermono. The Ducati V-One, as he calls it, is for racetrack use only and when things get sorted out he plans to build 40 of them for customers.

Which I guess is why he is photographed running on a highway on it..!

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"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

Langanobob

#24
February 28, 2010, 03:57:46 PM
I got to hand it to this guy for dreaming it up and building it.   [beer]

And I'd have to think about it for awhile before I could accept that it makes 15 more HP than the stock twin.  Unless he's burning nitro-methane in it.  Or maybe I'm missing something.

ducatiz

#25
February 28, 2010, 04:50:26 PM
Quote from: Langanobob on February 28, 2010, 03:57:46 PM
I got to hand it to this guy for dreaming it up and building it.   [beer]

And I'd have to think about it for awhile before I could accept that it makes 15 more HP than the stock twin.  Unless he's burning nitro-methane in it.  Or maybe I'm missing something.

no, just gas.  forced induction is awesome.
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

Langanobob

#26
March 01, 2010, 01:04:57 AM
Are there any dyno printouts anywhere?   I would sure like to see one.  It's going to take a LOT of hp just to crank the compressor cylinder at 10,000 RPM.
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