Dyno results?

[peasea]

What with the sidecar boys slugging it out and trading insults and innuendo. Goblin and Sidecarbob getting all sexually frustrated and peasea repeating himself over and over it's actually getting quite interesting - I almost hate to bring it back on topic, but here we go.

Standard 06 FZ1 with a PC3. Now to alay any concerns the PC3 was fitted specifically to remove the throttle snatch these things are well known for.

Sure it wasn't a PS3?

[dhunt]

From what I've read, they're usually run with the bike in third gear, and full throttle. Is that correct? Can they be used to set fueling at lesser throttle openings? The VFR basically goes OK now it's got a PCII back on it, but I've been considering a dyno run not to see how much power it's got, just to get the air/fuel ratio better in a few part-throttle areas below 6k rpm.

When I got my 600 dynoed earlier this year. It gain a couple horses up top (That I can't really say I've noticed) but more importantly my mid range increased tons and the power was so much smoother.

This was done with runs from around idle up to redline. Also adjusting for different throttle positions at the same rpm.

Numbers wise this gave
107BHP with Yoshi TRS Can+K&N
Obviously this is relative to the dyno

[HDTboy]

Numbers wise this gave
107BHP with Yoshi TRS Can+K&N

That's rather amusing when compared to my numbers posted above

[dhunt]

That's rather amusing when compared to my numbers posted above

Yeah I saw that. That's why I actually posted my results. This was done on a dynojet Dyno (One of the ones that go off your back wheel) in Hamilton. What sort where yours done on?

[HDTboy]

Dynojet dyno at Henderson Motorcycles.
Would be interesting to see how much power my bike makes on the dyno you used in Hamilton

[speedpro]

I wonder if the correction factors were included in the calculations.

[gamgee]

mummy
http://www.youtube.com/watch?v=w3Lq0toTqts

[HDTboy]

I wonder if the correction factors were included in the calculations.

My sheets have "CF: SAE Smoothing: 5" written on them

[NordieBoy]

My sheets have "CF: SAE Smoothing: 5" written on them

All that does is smooths out the othewise sawtoothed curves.

[FROSTY:Me]

I can't see much point in using a dyno just to get a number on a bit of paper.
For me dyno runs are about optimising fueling throughout the rev range
Best fueling means a smooth power curve. To me a smooth curve makes for a more ridable bike that in my opinion is more pleasant to ride than something that has a boom n bust power curve

[Fox Rider]

My VFR750...

[speedpro]

My sheets have "CF: SAE Smoothing: 5" written on them

No correction factors - good for big numbers.

that video of the 'busa has a few things that are a bit dodgy or just plain bad practice

[doc]

I'm pretty ignorant when it comes to all this stuff. But I've got the spare income to spend on this stuff. What I want to know from this stuff is honest results. Like yeah a pamphlet says my bike does 100 whatever thingys. So put up on a machine and if you have to tell them stuff to get results I think I'm geting ripped here. If I put my toy on a dyno I just want them to tell me what it was, then tell me what I've done and show the difference. Dynojet are starting to look like the MacDonalds of Dyno's. They will give you what you want, you pay the money and you get a result you are happy with.

[HDTboy]

Dynamometers are a tuning tool. As has been said earlier, the numbers are not important. What is more important is the shape of the torque and power curves.

We tell the dyno operators what has been done to the bike in order to make the tuning process easier for them, and cheaper for the customer.

The bigger and flatter the torque curve, the better. Any dips in the torque curve show up exponentially in the power curve, and feel like flat spots when riding the bike. With a big flat torque curve, the bike will feel like it has plenty of power on tap at any point in the rev range.

The numbers are useful for comparison when all of the conditions of the dyno runs are exactly the same


If you want to read negative propaganda about Dynojet dynos, go to the Factory Pro website

[cowpoos]

If you want to read negative propaganda about Dynojet dynos, go to the Factory Pro website

ummmm...there fuck loads of bad press in tuning circles bout dynojet dynos...not just the factory pro site





and BTW...my so called gsxr812 superbike monster...has just finnished being tuned and it makes a rather pathetic 120hp same dyno same day a pretty well stock gsxr1000 made 150...which makes me wonder what really is under my engine casings...a full strip down after the last round might prove interesting!