Dyno HP

[Sewman]

I have a general question about Dyno numbers.

I had 2 bikes dynoed. One of the graphs says CF:STD Smoothing and the other says CF: SAE Smoothing

Will one of them show more HP than the other? What is the reason for each.

Thanks in advance for the feed back.

 

[Got-Busa?]

STD will show more power.  It boils down to the correction factor....

Lot's of info on this topic.... http://www.moto-one.com.au/performance/dynocorrectionfactors.html

http://www.drdyno.com/AIM_July06.html

 

[CAT3]

Yep, generally the industry "standard" if you will, is SAE. When a shop is hurting to boast numbers produced they can use STD, as well as other "dyno tricks" like loading the tire forward of the crown of the roller etc...

 

[Commuta_Busa]

and as far as the smoothing that's just so the graph is more legable. It doesn't effect the actual numbers.

 

[MetalDisorder]

I just ran my bike on the Dyno and it was CF SAE Smoothing 5 and it went 162.89...
I have see much bigger numbers on here guys ... What up ?
My bike is stock with slip ons  4300 miles on my 08... My 06 did 154hp

 

[onedownfiveup]

and as far as the smoothing that's just so the graph is more legable. It doesn't effect the actual numbers.

Actually smoothing does change the power #'s.

Also, SAE is the industry standard so you can compare dyno graphs from one dyno to another. STD can show how much power the bike made that day in those conditions.

 

[MetalDisorder]

It makes it hard to guage real progress for mods if there is no "TRUE" calibration for dynos

I dont know what to make of the 162 number. "They" say that rear wheel should be 15% lower than motor specs. If so that would put crank power at 187.32 not 194

 

[onedownfiveup]

It makes it hard to guage real progress for mods if there is no "TRUE" calibration for dynos

I dont know what to make of the 162 number. "They" say that rear wheel should be 15% lower than motor specs. If so that would put crank power at 187.32 not 194

You do realize that every single engine is different and will make different power #'s no matter what? You can take 2 of the same bikes and put them on the same dyno back to back and they will make different power.

 

[MetalDisorder]

Yes I do realize that but you are usually talking about a 2% difference in a mass produced close tolerance engine like the Busa has not 10% it has to be the Dyno's not the bikes that are that far off!

 

[lacker]

Sounds bout right

 

[Got-Busa?]

It all has to do with the dyno. I would post up the weather info and see if JohnnyCheese can give you a more accurate reading if you are worried about it. Otherwise, I would take it to the track and see if the times/MPH is in line. If it feels down on power then get it checked out under warranty but if it runs great, take it to another dyno if you want.

 

[GoldenChild]

Dyno's are a tuning/diagnostic tool and that's it,not the last word on how much actual hp your making as there are millions of varibles..

 

[99'busa]

I've also heard that the break in effects the end pwr of the motor.

 

[onedownfiveup]

Yes I do realize that but you are usually talking about a 2% difference in a mass produced close tolerance engine like the Busa has not 10% it has to be the Dyno's not the bikes that are that far off!

I've seen bikes off by a lot before. It's no news to me. It also depends on how well its running as well.

HP/TQ readings don't really matter all that much, esepecually when you're splitting wigs out on the race track.

 

[MetalDisorder]

Good point ... It runs better than I can take advantage of and it sounds really good with that new exhaust .. So it is all good .. Damn dyno anyway :-)