How much diffrance in numbers do you guys think that diffrent dynos can or should run.

Not saying that my bloke is the best but he is well known for dyno tuning.

Was in the shop the other day and we were talking bout diffrent numbers with diffrent kits

and he said that lots of blokes come down from sydney saying there bikes are running good 

numbers like 105s for example yet he puts in on dyno and is pushing to get near the 100 mark, said it happens 

all the time. If this is the case i think its important to have a good tuner.

Has anyone had there bike on two diffrent dynos and got diffrent numbers?  

the old dyno debate ,dynos are just a tool like any other workshop tool ,yes you will get slighty diffrant readings from dyno to dyno
brand of dyno for starters,operater may use a diffrant ramp rate ,the dyno softwere, what gear thay do it in, dyno seetings ,
diffrant air temps of the day and lots of other factors thats why dyno dynamics in the early 2000s came out with shoot out mode
for there dynos so the operater only had control over some things and had less of a chance to fudge numbers, even if you where to
put the same car/bike on a dyno at 3 diffrant times of a day you would get slightly diffrant numbers .

you beat me to it cooky

Only ever got my bikes dynoed and tuned from the one bloke
as always seem to do a good job.

I'm not having nothing tuned at the moment so I don't give a fuck
just found it interesting.

Also bloke that does mine has dyno in an enclosed little room so don't
know if temprature will be much diff from time to time. Maybe.

Can usually feel where I'm at riding,but do like to hear numbers as well

 

You don,t  bring your printouts to a dyno shootout . Everyone , same day if possible , on the one machine .

 i have dyno sheets from 4 different harleys  all  bike's  are over 110 hp +  dyna's,   & backed them all up with 1/4 mile Drag racing time's  &  mph too verify,     when i can get some help to work out this scanner operation from  my children,  1st bike is a 103c.i.   07 model dyna , if you are interested 

Whats in the 103 to be getting them numbers D R?;

believe it or not she is all Screaming Eagle  only , it's a bike that i used from Frasers  showrooms  @ the drags  we just took off the blinkers & the mirror's  i had modified the stock exh system  stock mufflers  & made my own air velocity stack no air  filter i have the dyno sheet here  reading 112 hp with 108 ft lbs torque ,   on stock tyre's  best 1/4 mile time of 11.007 sec's @ 122.5 M.P.H.  i will print the sheet on another post soon  because i have 4 different Dyna's  from Frasers Motorcycles  all different  motor size' s   & @ 1 time or another  all the 4 bikes  won race's & qualified on # 1  spot in the Screaming Drag Racing  series,

A dynos consistency should only ever be gauged against itself. A dyno is simply a tuning tool that you can adjust efficiency of fuel and ignition timing to whatever mark the tuner decides, which could also be totally wrong.

The only comparison a dyno is good for is if you start with 10 bananas and finish with 11 bananas you are in front of where you started. Never use them for anything but that. You must also respect that you have a human operator with a rubber tyre on a steel roller, so regardless if the dyno is correctly calibrated like mine is, they will still be flawed in their numeric reading. The trick is to use the same dyno!!!

Regards- Ant

dynos are ok to do tunes but once out on the street things change all the time as cooky said big dyno numbers are useless if ya cant ride the bike too lol but best thing for ya bike is a AFR GAUGE permantly mounted so ya can see its stoitch in real riding conditions have put em on bikes an tuned after the bloke has a ride or i did an then took to the dyno an bike didnt need to be touched