My Dyno Run

CraigRegs · Sep 23, 2007

Once a month, May through September there's a great bike night in Indianola, about 15 miles south of Des Moines. Good weather can bring upwards of 2000 bikes. (So I'm told, I've never bothered counting.) Anyway, last Friday was the last one of the year and there was a bit of rain that moved through so the crowd was lighter than usual. The dealer where I bought my '07 brings their dyno trailer and there's usually a line, but not so this time. The dealer gave me a break on the price for the test, so I had them roll it onto the wagon. Here's the result:

Bike is bone-stock, 9300 miles, all I've done is ride it and keep the fluids fresh. FWIW.

Craig

abarron576 · Sep 24, 2007

Is your bike bone stock???

ionbeam · Sep 24, 2007

CraigRegs said:
Once a month, May through September...[charts deleted][SIZE=18pt]Bike is bone-stock, [/SIZE] 9300 miles, all I've done is ride it and keep the fluids fresh. FWIW.

Craig

kurtfriedrich · Sep 28, 2007

CraigRegs said:
Once a month, May through September there's a great bike night in Indianola, about 15 miles south of Des Moines. Good weather can bring upwards of 2000 bikes. (So I'm told, I've never bothered counting.) Anyway, last Friday was the last one of the year and there was a bit of rain that moved through so the crowd was lighter than usual. The dealer where I bought my '07 brings their dyno trailer and there's usually a line, but not so this time. The dealer gave me a break on the price for the test, so I had them roll it onto the wagon. Here's the result:
Bike is bone-stock, 9300 miles, all I've done is ride it and keep the fluids fresh. FWIW.

Craig

I think comparing different bikes on the same dyno, or your own bike before and after mods on the same dyno is interesting, but comparing numbers from 2 different dynos is a mistake. For example, my 749 showed 106.2 on one dyno (Bremmerton), and a short while later, 98 on another (EMS in Bellevue).

Kurt

panayoti · Sep 28, 2007

did they tweak the ECM? i noticed your a/f ration on one run is very different.

if the test is run to the sae spec and the dyno is in calibration. 1 hp is 1 hp.

also a calc is suposed to be run to correct to std conditions. (air temp. altitude etc)

i assume the software would take care of it.

CraigRegs · Sep 29, 2007

panayoti said:
did they tweak the ECM? i noticed your a/f ration on one run is very different.
if the test is run to the sae spec and the dyno is in calibration. 1 hp is 1 hp.

also a calc is suposed to be run to correct to std conditions. (air temp. altitude etc)

i assume the software would take care of it.

I'll be honest, I'm not real sure what they did. I'm not one who fully understands all the physics and subtleties involved here. If tweaking the ECM involves getting at the engine or something similar, then no. He just opened 'er up 3 times and grabbed the switch that hung above the bike. Perhaps the way the sensor was positioned in the exhaust?

Craig

My Dyno Run

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