Todd’s 80+ HP is on the rear wheel
which with equal to close to 100hp
what the factory would post as crankshaft HP!!!
That is an amazing number for a small block Guzzi!
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2021 850 Le Mans?
- Thread starter GTM®
- Start date
which with equal to close to 100hp
what the factory would post as crankshaft HP!!!
That is an amazing number for a small block Guzzi!
As always… crickets.
People would rather show up here and declare sensor foolers to be good enough, and actually try to go to battle with me here on it.
Forgive the ignorance since I'm relatively new to going beyond appreciating a motorcycle for the looks haha
So if I understand correctly, the specs that factories list in terms of horsepower are at the crankshaft? So for example, Moto Guzzi lists the V85TT at 76hp which is different, and higher, than what it puts down at the rear wheel? If I'm understanding correctly then what Todd is able to do is really impressive.
So if I understand correctly, the specs that factories list in terms of horsepower are at the crankshaft? So for example, Moto Guzzi lists the V85TT at 76hp which is different, and higher, than what it puts down at the rear wheel? If I'm understanding correctly then what Todd is able to do is really impressive.
Correct. If you look at the dyno run sheets on that thread, and/or any you find online, they are all ~62-65 hp at the tire bone stock. We've now had several @ 80~83 at the tire in my shop with our mods.
And here is the HP number that doesn’t change no matter what you do with the engine (Numbers of my V7 850 E5 stock)
Factory clams 65HP
Roller dyno. 51.8HP
Loss trans&
Final drive. 13.2HP
Those 13 hp are used to turn the gears in the transmission the final drive to the wheel
That “HP drain” is always there no matter what you do to the engine!
To compare apples to apples and oranges to oranges those 13 hp have to be added to whatever comes out on the roller Dyno!
These 13HP losses should apply to all six Speed versions V7 & V85
(This is the simplified version)
Factory clams 65HP
Roller dyno. 51.8HP
Loss trans&
Final drive. 13.2HP
Those 13 hp are used to turn the gears in the transmission the final drive to the wheel
That “HP drain” is always there no matter what you do to the engine!
To compare apples to apples and oranges to oranges those 13 hp have to be added to whatever comes out on the roller Dyno!
These 13HP losses should apply to all six Speed versions V7 & V85
(This is the simplified version)
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So Todd’s Dyno test resulting in 83 hp on the rear wheel equals really 96hp on the crankshaft
And that ladies and gentlemen is absolutely outstanding ....
And that ladies and gentlemen is absolutely outstanding ....
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Vagrant
GT Reference
It's safe to assume that a shaft drive bike will lose 20% at the rear wheel and a chain 10%. Me, I'd rather be shafted any day. Factories tend to be optimistic with their #'s.
Turning rotation by 90° definitely is eating power! Yes, looking at about 20%
That what seems to be the consensus is on the Internet when googling the subject matter as well....
I would have assessed less because we still have the transmission turning as well
That what seems to be the consensus is on the Internet when googling the subject matter as well....
I would have assessed less because we still have the transmission turning as well
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Getting closer
