351 at Dyno

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  #21  
Old 04-01-2014 | 11:54 AM
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Originally Posted by durielk
OK, so expslains to me how honda won the motogp many years by running their engines at 18-27,000 rpm. There was no torque down low.
Read the article. Torque may be at 800 rpm with a diesel or at 15000 rpm with a MotoGP bike, doesn't matter where it is, the fact is it will pull strongest wherever that peak is. That is its work zone.

Doesn't matter where the peak is, what does matter on the street is having a fairly wide flat curve, otherwise you're working like crazy to stay in the power. That was why some of the old GP 80s used to have 7 speed transmissions and riders would have to paddle like crazy off the start line - to get the bike into the good power and keep it there. A standard 5 speed wouldn't do it the power band was that narrow.

You could probably not really ride a MotoGP engine on the street because the torque curve is probably rather peaked in shape instead of flat. It also runs higher in the rpm range to make that peak. You either gain horsepower by rpm or by displacement - per the Hot Rod article.
 
  #22  
Old 04-01-2014 | 03:39 PM
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Originally Posted by klx678
You either gain horsepower by rpm or by displacement - per the Hot Rod article.
And forced induction That's why when you build a drag motor, specifically supercharged, you want the longest flattest torque curve you can get, and spike in power can result in the wheels losing traction.
 
  #23  
Old 04-01-2014 | 10:06 PM
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Okay so I got a hold of the place, they only did HP dyno runs, no torque reading available, also they don't save any of the runs so that's that I suppose. I might just take it to my local dynojet shop down the street to get a more comprehensive test.

Good news however I won the contest for most HP in the dirt bike class!!! $100 gift card
 
  #24  
Old 04-02-2014 | 12:02 AM
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For a drag race, I'll take my max torque at 20,000rpm's thank you. I'll be waiting at the finish line for ya!

If it don't have enough power to break the rear wheel loose, I'll take that wide ratio tranny with it.
 
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