Another Dyno Run at Steve's

[Steve TLS]

Mattbl came over today and we did a few runs on the dyno with his bike.

Mods include an air filter and Yosh slip-ons.

We did 2 base runs to make sure everything was consistant, then had a go with the re-mapper and did another 3 runs just to make sure the results were right.

A whopping 11.1 stevepower increase

I was hoping just to get rid of the dip in the power curve up top, didn't expect the overall result. I was happy. I hope Matt is happier. I'll have ot wait for his road report after his 1.5 hour ride home.


2 base runs overlayed 124.5 stevepowers

[Steve TLS]

Next a remap and a couple of runs....135.6 stevepowers

[Steve TLS]

And finally, a before and after overlay

[Guest]

that's a lovely curve

steve what sort of precision do you have on that dyno?

-

[Steve TLS]

stevepower precicion

But the results are repeatable, note that there is only a very slight difference in the 2 base run graphs and the two remapped graphs, the difference could be drum bearing temperature, tyre temperature and rolling resistance etc, etc.

Seeing as no two dyno's put out the same value for the same bike, I'll just stick to stevepowers for now, as long as the repeatability is there I'm happy. One day when I get remotivated I'll do some run down tests and rework the formula so I can confidently say it's HP.

[tl1000lasse]

It must be so cool too have a own dyno bench

[Steve TLS]

You can bet the neighbors don't think so

[tl1000lasse]

Buy them some earplugs

[mattbl]

Thanks Steve.
Did some hard throttle roll ons on the way home and it pulls steady and hard all the way through the rev range to the limiter. The difference is definately noticable. I would say the power delivery is more pure with no flat spots.

Thanks Steve - All round great guy









But we already knew that

[tl1000lasse]

So how about a raffle ticket for a dynorun at Steves

[TL-R1000]

Is there anyway you can make it measure in some reputable scale? PS, metric HP etc or will it forever measure in stevepowers?

[Steve TLS]

No worries Matt.

Originally posted by Steve TLS
One day when I get remotivated I'll do some run down tests and rework the formula so I can confidently say it's HP.

I'm just a lazy sod, I busted my balls for a long time to get it all together and working and when it did work and the results I got were "near enough" most of the motivation disappeared, I'd done what I set out to do and that was that. That was back in the days when I'd only access the internet to learn more about dyno's, programming and data acquisition.

All the conversions are there in the program already, it's just a button click for HP, PS or KW, same for the torqe values too. But for the time being I can live with SP, Metric stevepowers and kilostevewatts.

It's not that hard to do the final calibration, I've written the code for my DAQ unit and have a front end to read it, I just have to do it. I need to spin the drum up to max speed (~300kmh), jack the bike off it and graph the run down for drum windage and bearing losses, add these values to any bike run for true HP.

Another rundown would be to run up to max (~300km/h) and pull the clutch and graph the run down, these losses would be drum and bearing losses, tyre friction, chain and sprockets and gearbox losses and give me a HP at the clutch reading.

Also, I really don't mind stevepowers, hp on an inertial dyno is anyway. Because an inertial dyno reads exactly what the road sees, comparing dyno HP to other dyno HP and bike to bike is wrong. Here's an example, I run my TL and it shows 120HP, I then put a 520 chain and a lightweight rear wheel on it, it now shows 128HP , the bike isn't making more HP, but more is available to accelerate the bike because less is needed to spin up the chain and wheel, and on the road the bike will accelerate faster. So according to mine and any other inertial dyno my bike is making more HP but I didn't touch the engine

Leaving or calling them Stevepowers also lets me drum this in too. Unless two bikes are run back to back on the same dyno the results shouldn't be used against each other. As long as the dyno gives repeatable results and is used as a tool for comparing changes and results to see if they are for the better or not it doesn't matter what numbers are used for the output. They shouldn't be used to compare the power of two different bikes across the globe etc.

[DaRKoN_]

that's a hefty increase in SP's!

Maybe you can work the same magic on mine when im down there in dec! (If i ever get my bike going!)

[Rupes]

Man just wait till I get the beast back together with the nitrous hooked up, I'll be down there in a flash

35 tooth sprocket will see 300 plus

[Crusher]