Dyno questions?

[Cutty72]

Gearing yes (possibly, depending on if you can get a tach signal)
Rider weight, no. There should be no rider weight on the bike when running on the dyno. Rider should stand straddling the bike.

[Dnyce]

Originally Posted by Cutty72

Gearing yes (possibly, depending on if you can get a tach signal)
Rider weight, no. There should be no rider weight on the bike when running on the dyno. Rider should stand straddling the bike.

never seen it done like that honestly

[Cutty72]

Originally Posted by Dnyce

never seen it done like that honestly

here ya go.

he's straddling it, but not really putting any weight on the seat.

[Dnyce]

u know-i was lying, cuz thats your bike, and i watched most of the 1st one i think. oops lol


in person, always feets on the pegs tho-could just be the one side im standing on tho

[Cutty72]

Originally Posted by Dnyce

u know-i was lying, cuz thats your bike, and i watched most of the 1st one i think. oops lol


in person, always feets on the pegs tho-could just be the one side im standing on tho

all I've seen have been fully standing.

though one foot on the peg shouldn't affect that much, but it could throw it off.
just like if you put the tire back on the drum it will give a low reading, and forward on the drum will give a high reading. It's gotta be centered to be accurate.

And yup, that's mine. Bitch ran good that night

[HRCNICK11]

Should not matter as long as its the same each time. In other words don't let the fat guy do one pull and the thin guy do the next pull. Always go out of your way to make each run the same. Check and adjust things like tire pressure and engine temperature.

The numbers don't really matter much its the difference from the stock pull to the modified pull. You should not compare dyno umbers with a different dyno.

P.S. I disagree with the standing over the bike as you can not properly work the controls and if needed for some emergency the rear brake would be hard to apply quickly. Not to mention a all gear run would be tough and they can help find a float level or starvation problem.

[Mr Lefty]

Originally Posted by Dnyce

never seen it done like that honestly

same here... they're always sitting cause they have to shift... and it takes too much coordination apparently to do with out sitting

[Cutty72]

Originally Posted by ebbs15

same here... they're always sitting cause they have to shift... and it takes too much coordination apparently to do with out sitting

Most dyno runs (that I've seen) are a single gear pull. usually one gear down from top (ie 5th for sportbikes, 4th for most HD's) as that is the closest to a 1:1 ratio.

[HRCNICK11]

Here I'll show you say you have 40 Ft/pounds of torque at 4000 rpms

40 X 4000 / 5252 = 30.4645849200304645849200304...... HP

Every time, the math never changes its always that HP for that torque at that RPM. If the torque goes up for a given RPM the horse power has to follow they cannot go in different directions. They are always proportional they can not be inversely proportional.

[marko138]

Originally Posted by Dnyce

never seen it done like that honestly

Me either. Dood was sitting on mine when it was done.