horsepower calculation

[Deleted User 287]

there are calculator apps that work with the g-sensor in the iPhone.

http://itunes.apple.com/us/app/horsepow ... 55060?mt=8

There is a g-sensor in that phone?
That would be fun on airplane take-offs.

[twist]

I guess the part I should have included is that I have made improvements, (in my opinion) to the bike and it runs better, (again, my opinion), and seems to have more power than it did. Specs for this model is about 60 hp, I forget the rpm. Not that important I guess but it would be nice to know how much effect my attempt at tuning has had on this bike. It's shallow but bragging rights can be fun.

[Deleted User 287]

bragging rights can be fun.

Hell, just make something up, then.
Whats that about kicking tires and telling lies?

[Major Softie]

+1 on Major Softie's post. Improvements in acceleration by measuring the change in speed from normal speeds (e.g. 30 to 60) will be the most valuable as it will be an apples to apples comparison and will factor in varying engine speed, drag, rolling friction, etc. An improvement in bhp as measured on a dyno might only happen within a rpm band that you don't like to use. Comparing improvements in speeds you drive at will bring out the benefits of changes you make to the bike.
DaveM
1975 R90S
2000 R1100RT

I don't know who the hell Dave Backmarker is, but I like him already.

[Roy Gavin]

If you have a paralever you could mount a strain gauge on the lower link and work it out from there.

Probably easier to do what Major suggests.

I have a favourite test hill , round the corner at the at the bottom at 50 km/hr in second then flat chat up to the crest, at somewhere between 90 km on a YAMAHA XT 600 TO 130 km on my G/S.

I set my ignition timing up the hill too, probably wont give the best spot for peak HP, but puts the power just where I use it.

[Garnet]

I have a favourite test hill , round the corner at the at the bottom at 50 km/hr in second then flat chat up to the crest, at somewhere between 90 km on a YAMAHA XT 600 TO 130 km on my G/S.

I set my ignition timing up the hill too, probably wont give the best spot for peak HP, but puts the power just where I use it.

Sorta like a backyard dyno, cept it's around the corner.