Dyno numbers - 2.5inch Headers vs Stock headers

sunny

Supercharged
Joined
Jul 17, 2021
Messages
397
Ride
Rocket 3R LIMITED EDITION
Dyno runs charts are 2 years apart.
Both Dyno are from Different Businesses. Not the same Dyno machine.
Dyno1 was ran during Summer July, Dyno2 was run today in Nov.

Dyno run 1 is with Werkes Exhaust + Penner Tune + Stock Headers

Dyno run 2 is with Open Exhaust + Penner Tune + 2.5inch headers+ No oxygen sensor


Please provide your inputs and tell me recommendations/advice
Cheers

https://i.postimg.cc/VfpWct6d/dyno1.jpg High resolution photo

 
How I understand 165/164hp it kind off lost 0.5 hp? Considering it’s minimum 1000$ upgrade is not doing much ?? Or I’m something missing??
 
20R3GT said:
How I understand 165/164hp it kind off lost 0.5 hp? Considering it’s minimum 1000$ upgrade is not doing much ?? Or I’m something missing??
Click to expand...
Both Dynos were from different businesses and not from same guy + Summer vs Cold weather Dyno run.
 
stingray said:
Doesn't seem like it made much difference. The 160 torque number seems like a fluke after shutdown, drum spin. Looks to be more around 135 to 140 before that anomaly.
Click to expand...
what I dont understand is throttle response on the bike with open headers is way better than before, huge difference, I move throttle at any gear and it goes which was not the case before.
Second, with open headers my MPG has gone 30% down than before so I need 30% more gas per fill if I want to go same distance as I was going in one tank before open headers.
 
I would say the data doesn't mean much because there were too many variables. To have real meaning you need to have a run, make the changes and then make the run again in a much shorter period of time.
 
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