Dyno run

Energy One

K9PSYCH

Active Member
Ran my bike on the dyno today, and the numbers weren't as high as I thought they would be.
HP - 106, Trq - 121
Cam - Redshift 576
Jets - Int. 31, Main 78.
Intake - D & M
Exhaust - Streetwalker, Skinny Mini
They said the style of pipes I'm running is holding it back. What do you guys think?
Thanks,
John :flag:
 

Chopper Dave

SIICK!!!
those numbers are pretty good I think....:cheers: being that you didn't have any motor work done...like the comp....heads..etc.
 

Raywood

The Pirate
Staff member
Calendar Participant
Troop Supporter
It was most likely the D&M. Put an open cone on it and have it done again and you will prove it to yourself. If the pipes don't have baffles then you should at least put some washers or bolts in them.

Plenty of power there to get you down the road though.

:cheers: :cheers:
 

go4dave

Member
Those numbers are respectable.
If you have your Dyno sheet,,,,, can you post the other numbers?
What was the Temp at the time of Dyno run?
What was the Barometric pressure?
What is the Elevation where the Dyno is located? (if you don't know, what is the address of the shop,, and i'll get the elevation)
Also,, how was the air/fuel mixture? Did you tune the bike on the Dyno,, or just do the runs?

:cheers:

Ran my bike on the dyno today, and the numbers weren't as high as I thought they would be.
HP - 106, Trq - 121
Cam - Redshift 576
Jets - Int. 31, Main 78.
Intake - D & M
Exhaust - Streetwalker, Skinny Mini
They said the style of pipes I'm running is holding it back. What do you guys think?
Thanks,
John :flag:
 

K9PSYCH

Active Member
Dave,
The run was performed in Nashville, TN. The printer was not working the day of the run, so I don't have all the information to look at. The temp that day was in the upper 80's & very humid.
The bike was tuned during the runs & was found to be running a little lean at the start. Total run time on the dyno was approx 1 hour.
John :flag:
 

go4dave

Member
that's cool,,, if you can still get those additional numbers,,, i'd love to see them (i'm a numbers freak) also,,, you can follow this link:
Relative Horsepower Calculator

On this site,, you can input the numbers you had for that day,,,, and compare with others,, on different days and places.
As you will see by inputting some different Temps, Elevations, Hg/in, how much HP you gain or loose. I personally thinks it very helpful. FYI Nashville, TN airport (BNA) as a runway elevation of 599 ft above sea level.
Can you tell me what day you did the run? FYI if you ran your bike on June 17, in Nashville. The temp was approx 85*,(83* for an Avg) Hg/in =29.65, Elevation BNA 599ft, Humidity = 75%...
You only built 94.7% of your possible horsepower. Mostly due to the Barometric Pressure, you built about 5% less then your bike is capable of.

To get to corrected Horsepower,,, so you can compare with your friends,,, you would multiply your numbers, by 1.053 (as long as the dyno SAE factor was set at 1:1.00)

That means you built a little more then the paperwork showed.
I hope that helps,, and i hope it makes sense.

so,, if you get the chance,,, see if they can print out the dyno runs from that day,,, there is a ton of useful information on those sheets.
:2thumbs:

Dave,
The run was performed in Nashville, TN. The printer was not working the day of the run, so I don't have all the information to look at. The temp that day was in the upper 80's & very humid.
The bike was tuned during the runs & was found to be running a little lean at the start. Total run time on the dyno was approx 1 hour.
John :flag:
 
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