kb58
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| posted on 2/5/06 at 05:31 PM |
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I4 and V-twins
I know most of the top engines out now are inline-4s, but would like to explore V-Twins. Is there a resource to check, or does someone here have a
list of power outputs of modern V-Twins?
Mid-engine Locost - http://www.midlana.com
And the book - http://www.lulu.com/shop/kurt-bilinski/midlana/paperback/product-21330662.html
Kimini - a tube-frame, carbon shell, Honda Prelude VTEC mid-engine Mini: http://www.kimini.com
And its book -
http://www.lulu.com/shop/kurt-bilinski/kimini-how-to-design-and-build-a-mid-engine-sports-car-from-scratch/paperback/product-4858803.html
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tigris
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| posted on 2/5/06 at 05:53 PM |
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sportrider.com has bike specs. Twins usually have the same torque(lower rpms though). My research has led to sort of a dead end because these engines
are not as receptive to FI as an I4. 130 hp out of a tl-r seems pretty easy though.
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tigris
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| posted on 2/5/06 at 05:58 PM |
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check sub3wheeler.com. they use a tl-r powerplant, very cool
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cossey
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| posted on 2/5/06 at 07:10 PM |
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v2s have good torque but cant rev that high so dont have as much power as a typical I4.
they do seem to have a more limited traction friendly delivery, im not quite sure why but many of the racing I4 bikes emulate this with the big bang
firing pattern.
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spunky
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| posted on 2/5/06 at 09:36 PM |
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VTR1000 SP1
Hi all, not posted for ages but I can confirm that the SP1 engine I fitted was 128 bhp and 72ft/lbs
A very quick car and the most glorious sound.
John
The reckless man may not live as long......
But the cautious man does not live at all.....
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tigris
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| posted on 2/5/06 at 11:52 PM |
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any clue on the weight of that motor? I might think that the 2 banks would outweigh 1/2 cylinders? Thanks
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spunky
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| posted on 3/5/06 at 07:43 AM |
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wait.....errrr weight!
never actually weighed the engine but did lift it in and out a few times.
Not a particularly light lump, I would say dry weight was around the 60ish kilo. with no oil cooler, headers, rad.
john
The reckless man may not live as long......
But the cautious man does not live at all.....
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wildchild
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| posted on 3/5/06 at 08:20 AM |
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quote:
Originally posted by cossey
v2s have good torque but cant rev that high so dont have as much power as a typical I4.
they do seem to have a more limited traction friendly delivery, im not quite sure why but many of the racing I4 bikes emulate this with the big bang
firing pattern.
The theory behind this is that V-twins fire both cylinders pretty close together, so there's a lot of crank rotation with nothing firing. This
kind of pulsed power allows the tyres to regain traction in between pulses. A traditional inline 4 fires pretty much continuously, so once it loses
traction, it spins up.
You can of course move the firing points on an inline 4 (Yamaha did it last year in BSB, Yamaha and Kawasaki do in MotoGP). Trouble is it shakes
itself like anything if you do, so road bikes are still conventional
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