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post #1 of 19 (permalink) Old 12-28-2006, 03:39 PM Thread Starter
 
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Dyno Testing

I had a very intersting conversion with a friend yesterday about dyno's. In my opinion Dyno testing is a waste of time unless you just need to show or brag about horsepower numbers. The thing that burns my skin is that some big time exhaust companies are saying that switching to thier exhaust will provide this much more horsepower and have the numbers to prove it from dyno readings. What a lot of people dont know is that a dyno can be switched to read in two differnet types of meauserments from metric to standard by the person doing the dyno to read differnet numbers to show a false increase in hp's. I have always been a firm believer in taking a bike to the quater mile a meausring the horsepower by the 60 foot et times and mph vs the reaction time. a slow reaction time and 60 ft time with a low et and high mph means that your working with power other wise i think it all just a waste of money and another hustle
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post #2 of 19 (permalink) Old 12-28-2006, 05:43 PM
 
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post #3 of 19 (permalink) Old 12-28-2006, 06:05 PM
 
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A dyno measures torque. Then a formula changes it to horsepower. Some people like high rpm horsepower and some like low down torque. EPA measures a bike's exhaust at certain mph. On a dyno printout, you can see by the hp and/or torque dip where the manufacturer had to lean out the mixture for EPA. At the track or strip, you want max hp and can just power right through those dips.

But I ride on the street and that dip might be right at the beginning or middle of my cruising rpm. That might mean a hesitation when opening the throttle. The dyno can work perfect for tuning out those dips, either by changing the mixture through different jetting or a Commander.
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post #4 of 19 (permalink) Old 12-28-2006, 07:26 PM
 
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Originally Posted by zukboy View Post
I had a very intersting conversion with a friend yesterday about dyno's. In my opinion Dyno testing is a waste of time unless you just need to show or brag about horsepower numbers. The thing that burns my skin is that some big time exhaust companies are saying that switching to thier exhaust will provide this much more horsepower and have the numbers to prove it from dyno readings. What a lot of people dont know is that a dyno can be switched to read in two differnet types of meauserments from metric to standard by the person doing the dyno to read differnet numbers to show a false increase in hp's. I have always been a firm believer in taking a bike to the quater mile a meausring the horsepower by the 60 foot et times and mph vs the reaction time. a slow reaction time and 60 ft time with a low et and high mph means that your working with power other wise i think it all just a waste of money and another hustle
I would have to call with its a waste of money or a hustle. i have a dyno and it is a very good tool in tuning a motorcycle. Yes somethings can be changed to make your numbers higher BUT it will bite you in the ass if you do that kinda thing in the long run. what alot of people dont realize is its not how much HP you make but how you get to that HP. if you take a well tuned GSXR 1000 (lower HP)and a poorly tuned but high HP GSXR 1000 the properly tuned one will smoke the others ass everytime. Yes everyone wants to have the most HP but someone will always have one with more. When used right the dyno is well worth the money.
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post #5 of 19 (permalink) Old 12-28-2006, 08:37 PM
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Moved thread to tech!

I must say I agree... it is NOT a waste of money. I think just the opposite Zukboy. The drag strip... too many variables there! On the dyno, as long as the outside or shop weather isn't changing each pass is exactly the same.

As far as changing the dyno from metric to standard... there is a word for that... FRAUD! And we all know that on most bikes, changing the exhaust does increase hp/torque. The amount may vary but it does happen.




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post #6 of 19 (permalink) Old 12-28-2006, 11:05 PM
 
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I'd like to throw mine on a dyno to see what kind of power it's putting down.



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post #7 of 19 (permalink) Old 01-02-2007, 04:25 PM
 
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i have a question about dynos....bc i have a problem with my bike and nobody knows whts wrong...and then i was told to put it on a dyno and then it would tell me excatly whts wrong with it...so i was wondering if it was true
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post #8 of 19 (permalink) Old 01-02-2007, 10:42 PM
 
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i have a question about dynos....bc i have a problem with my bike and nobody knows whts wrong...and then i was told to put it on a dyno and then it would tell me excatly whts wrong with it...so i was wondering if it was true
Need to know what the problem is before i can tell you if a dyno will tell you.
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post #9 of 19 (permalink) Old 01-04-2007, 06:46 PM
 
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well it runs like poo....it revs till like 9-10 grand and then it like chokes itself..it does it through all gears....it wont even go past 100mph...
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post #10 of 19 (permalink) Old 01-04-2007, 07:06 PM
 
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you can't beat dyno tuning. dyno's are useful in making adjustment from stock to modified. you can see the results of every mod you do.
on one of my race bike, I bought a stock 1993 zx7 with a dip in the midrange. a full pipe and jet kit (several runs and adjustments) removed the dip and increase hp all around. the pipe length was adjusted, needle height, jet sizes, and different filters.

on another race bike, we tested the difference with newly ported intakes and roughed up exhaust.

putting different bikes on the same dyno will show accurate results. every race team i've competed with uses a dyno.

- a|ex
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post #11 of 19 (permalink) Old 01-04-2007, 10:07 PM
 
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well it runs like poo....it revs till like 9-10 grand and then it like chokes itself..it does it through all gears....it wont even go past 100mph...
sounds like a rich problem. what kinda bike is it? the easiest thing to do and its FREE is take the bike out and run it when it starts running like poo shut it off , coast into a place and pull your plugs and look at them. white will be lean and black will be rich. then let us me know what the results are.
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post #12 of 19 (permalink) Old 01-05-2007, 04:12 PM
 
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05' ninja 636.....it starts as soon as u start it up....its been through 3 sets of plugs....every time i clean up the plugs the first 3 cylinders are dry, black and the last one is wet and black....and i tested it and it gets spark.....so
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post #13 of 19 (permalink) Old 01-05-2007, 04:14 PM
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05' ninja 636it starts as soon as u start it up....its been through 3 sets of plugs....every time i clean up the plugs the first 3 cylinders are dry, black and the last one is wet and black....and i tested it and it gets spark.....so
What part of MI are you in? If your close to GR I might be able to swing by and take a look. If you are in the east, I bet Gas Man woulnt mind taking a look at it.
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post #14 of 19 (permalink) Old 01-05-2007, 07:51 PM
 
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clinton....about 15min from adrian...25 from ann arbor.....but yeah i've taken it too a couple of shops and they cant tell me the prob...non of my buddies know it either
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post #15 of 19 (permalink) Old 01-05-2007, 08:02 PM
 
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clinton....about 15min from adrian...25 from ann arbor.....but yeah i've taken it too a couple of shops and they cant tell me the prob...non of my buddies know it either
GR, He's about halfway between you and GM. GM's a ways southeast of AA still and you're about 75 min from Clinton.
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post #16 of 19 (permalink) Old 01-05-2007, 08:20 PM
 
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05' ninja 636.....it starts as soon as u start it up....its been through 3 sets of plugs....every time i clean up the plugs the first 3 cylinders are dry, black and the last one is wet and black....and i tested it and it gets spark.....so
Sound like its rich. All the signs are there. what mods do you have and if you are using a pc3usb what map are you running?
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post #17 of 19 (permalink) Old 01-07-2007, 11:26 PM
 
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well i did use a power commander but it was just wasting gas bc the ppl who put it on didnt have a map on it......me and my buddy put the one off the website on it and it was better..but i took it off since this problem has been occuring.....i have a yosh rc5 slipon......but thts it
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post #18 of 19 (permalink) Old 01-08-2007, 12:25 AM
 
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well i did use a power commander but it was just wasting gas bc the ppl who put it on didnt have a map on it......me and my buddy put the one off the website on it and it was better..but i took it off since this problem has been occuring.....i have a yosh rc5 slipon......but thts it
take the programmer off and run the bike and see if that fix's the problem. you may have a bad programmer. i have seen it before. If it does fix the problem then you need the dyno to get a custom map. Those maps off of the website's will get you in the ballpark but not always good. Hope this helps
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post #19 of 19 (permalink) Old 01-08-2007, 10:13 PM
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I'm in southeast michigan... about 25 miles south of detroit.

Further... remove the power commander. And if you interested in having it professionaly dyno tuned I would recomend BSB in Farmington, MI in the backside of Recreational Leisure.




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