Dyno questions?

Rsv1000R · 12-19-2008, 10:49 AM

Quote:

Originally Posted by Cutty72

so I forgot to put in the "same displacement" part...

You also left out that it's the rpm that determines how much hp x amount of torque makes, and if a twin and a four make the same torque at the same rpm, they're making the same hp.

pickle.of.doom · 12-19-2008, 11:58 AM

It depends on if someone is getting some tuning actually done, or if they just want a piece of paper to wipe their ass with. For tuning, you want the rider sitting on the bike. The bigger key is that no matter which way you do it, standing or sitting, you need to be consistent. Some guys always sit. Some guys always stand. But whichever, you need to stick with one to keep your consistency.

HRCNICK11 · 12-19-2008, 05:08 PM

One of the good reasons to ride a v-twin is the decreasing torque curve. Its kind 0f a built in traction control. As the revs increase the torque eitherstays flat or decreases, post peak torque anyway.

If you look at just the torque curve on a inline 4 they tend to increase through most of the rev range. Where as a v-twin tends to decrease so as they rev (like during tire spin) they tend to have less torque than a few rpms lower.

On reaseon for that early lowend torque is the flywheel weight and big monster pistons.

Not to mention they have what I call a longer coast than most inline 4s. This is what the new R1s try to emulate with the big bang engines.

12-19-2008, 11:58 AM	#2
pickle.of.doom el diablo de verde Join Date: Feb 2008 Location: Howell, MI Moto: VTR, CBR, DRZSM Posts: 1,046	It depends on if someone is getting some tuning actually done, or if they just want a piece of paper to wipe their ass with. For tuning, you want the rider sitting on the bike. The bigger key is that no matter which way you do it, standing or sitting, you need to be consistent. Some guys always sit. Some guys always stand. But whichever, you need to stick with one to keep your consistency. __________________ WOS Forums

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12-19-2008, 05:08 PM	#3
HRCNICK11 Canyon Carver Join Date: Nov 2008 Posts: 429	One of the good reasons to ride a v-twin is the decreasing torque curve. Its kind 0f a built in traction control. As the revs increase the torque eitherstays flat or decreases, post peak torque anyway. If you look at just the torque curve on a inline 4 they tend to increase through most of the rev range. Where as a v-twin tends to decrease so as they rev (like during tire spin) they tend to have less torque than a few rpms lower. On reaseon for that early lowend torque is the flywheel weight and big monster pistons. Not to mention they have what I call a longer coast than most inline 4s. This is what the new R1s try to emulate with the big bang engines.