OK. I'll be onto it then.
Registered User
OK. I'll be onto it then.
Long Haired Yobbo
Jeeze you guys are mad...
A dyno on a trailer would be a silly possibility.
Heinz Varieties
Registered User
Fucken sense again. Go somewhere else if you're gonna talk sense.Originally Posted by koba
In the riders seat
Been done before, there's one in Chch like that, then when you want some more room at home you just go and dump it up someone else driveway
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."
Long Haired Yobbo
Yeah, after reading stuff on one of those links I was looking at the guy in Chch who built his own inertia dyno and thinking "that would fit in a trailer nicely".Been done before, there's one in Chch like that, then when you want some more room at home you just go and dump it up someone else driveway
Heinz Varieties
Po ta toes
Bring it! We all want to be dynoed!!
Long Haired Yobbo
If a dyno was actually built (very sketchy if) and if (another sketchy one) a container at the track happened that could be a possible solution to where to house it...Bring it! We all want to be dynoed!!
BUT ya really want it at a workshop where developmenat work could be done anyway.
Heinz Varieties
Blowin up bikes since ages ago
developmenat - is that some kind of new fangled french word or summat?
"Some people are like clouds, once they fuck off, it's a great day!"
Long Haired Yobbo
developmenat - is that some kind of new fangled french word or summat?
tenchars
Heinz Varieties
Forum whore
Another way to measure HP with a water pump that eliminates heating and other losses is to have the pump free to rotate a few degrees and have a torque arm resting on a load cell, (load cell could just be bathroom scales) or has weights added too it until it just balances the engine torque. Measure the pump shaft RPM and then simple maths using measured torque and RPM gives you HP. Another way is, is instead of a water pump use a disk brake as the load and measure torque and rpm as above. I have seen this done using a ventilated disk on Chrysler Hemi V8's. Everything glowed red hot including the exhaust manifolds and sparks flew out of the disk brake assembly but it all worked and it was simply torque times RPM ie "work-done over time" expressed as HP.
Last edited by TZ350; 24th May 2008 at 20:46. Reason: grammer
Forum whore
Another thought (concept) on a disk brake dyno. It would be possible to put the bike on a race stand, remove the rear wheel and fit the disk brake dyno assembley in its place. A rider could then sit on the bike, start it up and work the controls while an old PC collected the data and gave a detailed print out with graphs etc in real time.
Registered User
I think I'll start with a rolling road with variable load then worry about gathering hp and torque figures. I just want to be able to tune easily.
Hardcore Biker
The free to rotate with a torque arm is how they usually work, it seems, there is an article in an 80's performance bike that I read about it.
Two Stroke, the pinnacle of engine design
Forum whore
There is on the internet a dyno software package (about $10 USD) that works like an inertia dyno by using the bike plus riders mass as the load and the change in RPM of the engine to measure the acceleration and works out the HP required to accelerate the bike plus rider. I brought this package and it has nice torque and HP graphs. The hard part was recording the change in RPM. You are meant to use a recorder of some sort, tape, video, anything that can pickup the spark noise and then play it back into a PC through the audio card. This worked OK on my car where the spikes from the ignition pickup were of a uniform size but the bikes ignition signal varied to much with changes in load. Ie the bikes ignition will only put out enough omph for the spark to jump the gap and the omph required varied with acceleration but the car with its distributor etc gave a more consistent signal. Perhaps someone out there can help to develop a means of converting the ignition noise to a consistent amplitude from a single cylinder CDI and recording it into a simple tape recorder, help with this would be much appreciated.
If anyone else is interested I will find the URL for the software.
Forum whore
The Road Software Dyno is so simple, you just attach a recording device to the bike. Go for a blat. Download the recorded data to a PC. Analyze data. Fiddle with bike. Go for another blat. Check the recorded changes. Real simple. More blats, more changes more power.
This is a really good looking cheep dyno kit about 75 pounds for the kit. http://www.roadtune.co.uk/index.shtml
This is a really good description of how the in vehicle software Dyno is setup and works.
http://www.microsmith.co.uk/rd/dyno.htm
This URL does not work but it is where I got my software from last year.
http://www.charm.net/~mchaney/homedyno/dynokit.htm
Some general racing info and free software
http://racingdownloads.com/
Another dynokit
jgarman@earthlink.net
There are currently 1 users browsing this thread. (0 members and 1 guests)
Posting Permissions
Reply With Quote
Bookmarks