WOT sheets

[1FSTRK]

More tq 70% of the time.  Not 70% more tq.

Correct
Run 40 shows more tq from the hit of the throttle until about 4750rpm and then again from 5900 until the end.This is about 70% of the rpm range. I do not see how you could make that much more tq for that percentage of the run and not accelerate quicker unless you have a lower gear ratio which is what the gear ratio graph clearly shows.

[rageglide]

Amature math came up with approx 150rpm difference between the two runs at 75mph.  Looks like 5th gear in both 38 and 40.  It's pretty linear, is it really clutch slip?  Could it be tire wear?   

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[PanHeadRed]

Different build but the slip is a little easier to see. But hey, I could brag on the peak numbers out of a 103.

LOL!...Good one.

You should start a new thread titled "Torque Curl" and see what bull "Potty mouth" comes up for sale to correct it.

[Admiral Akbar]

These are the runs you posted, why the gear ratio change?


The red run made more TQ for about 70% of the rpm run, the only reason for the blue to accelerate in less time would be he gear ratio difference.

Sorry its the same gear.. The difference is only 4%.. Looks like the guy changed the rear tire.. And the clutch slipped less due to the motor making less TQ..

Max

[1FSTRK]

Different runs at different times.  Numbers just came out that way.  40 was done a couple of months before 38.  Same tire. I called the owner and asked him if he changed anything. He said no. He did mention that he felt he was hitting redline sooner.  I think he was getting slip and not recognizing it.

I label my stuff kind of strange and hit the green button a lot. They all don't mean a run was made.

[Admiral Akbar]

Different runs at different times.  Numbers just came out that way.  40 was done a couple of months before 38.  Same tire. I called the owner and asked him if he changed anything. He said no. He did mention that he felt he was hitting redline sooner.  I think he was getting slip and not recognizing it.

I label my stuff kind of strange and hit the green button a lot. They all don't mean a run was made.

Ok  Jason forgot to check the tire pressure on the first day??  It's not a gear change and the guy didn't change overall gearing.. 4% is not enough to be a full gear change..

How many miles on the bike between the 2 runs..
Max

[Admiral Akbar]

Or his drum wore down.. 

Max

Add
And it's only 3%

Max

[hrdtail78]

About a 1000 miles between runs. 

[rageglide]

But how many burnouts?   

[Admiral Akbar]

I see guys putting up back to back runs for comparison.  This is a good example of taking them with somewhat a grain of salt. There is more going on than what a sheet shows.

Bike is a 2000 roadglide.

Run40 is from 9/20 w/ a SE pro 2-1.  He had some problems with cracking so I welded it up and tuned it. He couldn't do anything else until after Xmas.  He brought it back for the 2-1 that he originally wanted.  I installed and did some tuning.  No other changes to the bike.  He put 1000 miles on it in between tunes. My stack was not calibrated between runs either.

So, did the pipe change do what we wanted? 

I think I screwed up.. Run 40 is before and 38 after?? Looks like he lost HP.. Makes more sense for the gear ratio measurement.. The tire wore down a little and it looks like the guy lost some HP..

So the new pipe wasn't as good as the old pipe..

Max

[Admiral Akbar]

BTW,, The AFR shows real lean.. Did you retune?   Is this carbed or MM?  If it was running lean on the first run September it would be a bit leaner now if it's carbed since ambient temp is cooler.. AFR measurement seems screwed up..

Max

[hrdtail78]

MM bike.  The AFR line is default since I was using TS.

[HD/Wrench]

Jason on the clutch loop .. blame it on the cam or even better the guy that made it.. That will make it personal  124 585 vs the 124 640. The 640 in some case will out run the 585 for low end power on paper. Seat of the pants feel the 585 gets it every time. But you will only see the change when you look at the time for the run.

[hrdtail78]

I do blame the cam. Most clutch slip I see IS the cams fault. They never slip as a stage I.  Some pushrods come with an install tool. Some pistons come with an install tool. Even the chrome control buttons from HD come with a tool.  How hard could it be for the 577 to come with an extra plate clutch.

[HD/Wrench]

I have some burn plates and blued steels I will send you a few HA HA

[BVHOG]

I do blame the cam. Most clutch slip I see IS the cams fault. They never slip as a stage I.  Some pushrods come with an install tool. Some pistons come with an install tool. Even the chrome control buttons from HD come with a tool.  How hard could it be for the 577 to come with an extra plate clutch.

And some inner cam bearings and a snap ring.