What's wrong with this dyno graph?

[Arseclown]

Hi all
This graph is from a stock 103a engine (2013 Roadglide).
Only mods are se204 cams, se ventilator air cleaner and freedom performance 2-1 exhaust.
Bike was custom dyno tuned using se tuner.
Those with a healthy knowledge of dyno tuning might be interested in highlighting some issues and possible causes?

The torque dipping early, number of runs and weather settings are things I'm interested in hearing knowledgable persons' feedback on

[Diesel Pro]

I'm far from knowledgeable on the Harley side of things, but know my way around a dyno plot.  To me it looks like is the before and after from a simple, relatively quick tuning session.  I'd say that quite a bit was gained by simple tuning.  It would appear as though the original tuning was off by quite a bit and maybe the new tuning could use a little refinement probably starting at 4,000-4250.

[rigidthumper]

"The torque dipping early, number of runs and weather settings are things I'm interested in hearing knowledgeable persons' feedback on"
Correction factor is the German standard- reads about like STD most of the time.  Weather? Around 70°,  I'd guess about 1700' above sea level based on the baro pressure.   Maybe they have 16 total runs, maybe they have 16 WOT runs- hard to tell, as some folks use different titles for each section of the tune, some just use "runfile"xxx for everything. Run 1 was as received, run 16 as returned to customer. Final result of 106/92 isn't horrible for a bolt in cam, that usually makes peak torque 3000~3500 RPM, but that depends on the pipe- very open exhaust usually show a dip @ 2000, and peak TQ can shift based on the velocity of the exhaust.
HTH

[strokerjlk]

 
Looks like a decent 53 min tune.
Numbers are in line . Looks like a 5 th gear run

[aswracing]

Assuming the timing table isn't jacked up, the shape of the torque curve is essentially a map of your cylinder fill. So this motor is filling the cylinders very well at low rpm and then more or less falling off a cliff as the rpm goes up.

There are a bunch of reasons behind that. But don't discount the pipe as being a major one. It has a lot to do with the shape of the torque curve.

Power is just torque times rpm, so big power comes from making torque on the right side of the chart, i.e. getting cylinder fill and rpm at the same time.

[Arseclown]

Thanks guys. Appreciate your feedback

[FLTRI]

Somethings not right. That's for sure. I would start with a CCP test and leak down.
Looks like maybe cam timing may be a tooth off?
AFR way off up high?
Bob

[whittlebeast]

It is missing AFR and it misses where you run the motor 99% of the time?

[FLTRI]

It is missing AFR and it misses where you run the motor 99% of the time?

I'm didn't read where he complained of missing?
Actually runs very well at WOT where most ride 99% of the time. 1500-3500rpms
Bob

[whittlebeast]

I just find it funny that people pay good money to only get a WOT dyno sheet claiming it was proof they got what they paid for.

In the real world, the bike never sees WOT. 

Andy

[1FSTRK]

You go Andy
Just a matter of time before guys at the biker bars will all be whipping out laminated scatter plots to show off and compare.

[WhipLash96]

I just find it funny that people pay good money to only get a WOT dyno sheet claiming it was proof they got what they paid for.

In the real world, the bike never sees WOT. 

Andy

Right on brother!

[strokerjlk]

I just find it funny that people pay good money to only get a WOT dyno sheet claiming it was proof they got what they paid for.

In the real world, the bike never sees WOT. 

Andy

In the real world they see 100 kpa at 40-50 % TP a lot more than people think .

But yeah a WOT shows nothing about cruise . But he didn't ask that . His questions were about the WOT dyno sheet .

When he asks about cruising issues is when you make your pitch .

[FLTRI]

Almost looks like shipping packing was left in the pipe! Lol
Or is it a "quiet" baffle that doesn't breath up on top?
Bob