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[HDMonsterTorque]

All dynosheets from freedom cycle have a (dangerously) lean afr at WOT.
All between 14 and 15 afr. This would be ok for cruising. But I don't like my bike to be that lean at WOT!
Maybe they are after the numbers only? Lean = mean?

Anyone with the real reason?

[OTIS]

All dynosheets from freedom cycle have a (dangerously) lean afr at WOT.
All between 14 and 15 afr. This would be ok for cruising. But I don't like my bike to be that lean at WOT!
Maybe they are after the numbers only? Lean = mean?

Anyone with the real reason?

 It is cheap fast dangerous HORSE POWER.

[jeffj]

All dynosheets from freedom cycle have a (dangerously) lean afr at WOT.
All between 14 and 15 afr. This would be ok for cruising. But I don't like my bike to be that lean at WOT!
Maybe they are after the numbers only? Lean = mean?

Anyone with the real reason?

What is the Optimum AFR?

[OTIS]

What is the Optimum AFR?

Air fuel ratio.

                                 OTIS [smiley=xyxthumbs.gif]

[jeffj]

Air fuel ratio.

                                 OTIS [smiley=xyxthumbs.gif]

Right but for a guy like me who rides 85% of the time at 3,200 rpm 80 mph on the Interstate or Highways, I do very little riding in town and no racing.

What would a good AFR be for my riding style?

[JCZ]

What is the Optimum AFR?

It should be at 13, across the board, Jeff.  I noticed that yours was a little high, after somebody raised the issue.  

Also, typically, your dyno numbers will drop off just a tad if the dyno run is SAE corrected and they usually are SAE corrected, especially for comparison.  I'm just not sure why Brad doesn't do that.  Likewise, I'm not sure why he's got your A/F ratio so high.  I think you'll notice it come this summer, when your motor is too hot to ride.  They don't experience the triple digit temps. all summer long, like we do........so it's not an issue for them up in Reno.

[grc]

You have to remember that the A/F ratio on those dyno charts is at WFO under load.  Air cooled Harley's seem to like 13.2 to 13.8 under those conditions.  Under light load and light throttle (normal cruising) you would expect to see anywhere from 14.5 to as high as 17.  In other words, the A/F ratio is not a static figure; it varies by RPM and load based upon how the ECM is programmed.

Jerry

[BLM777]

 It is cheap fast dangerous HORSE POWER.

AMEN!  Over lean dyno readings and uncorrected SAE, have been around for years to sell "performance" mods.  Tune to an acceptable AF ratio, add in the 3-5 free HP for gear drive, correct the run to SAE and you will have an accurate reading of what gain the Freedom cam grind has actually contributed to the performance.  I supect there is little if any.  

[Twolanerider]

Until it was pointed out I wonder how many did like I did.  Only looked at the upper juicy part of they dyno sheet and didn't even bother to look down?

[STICKMAN]

Remember that Freedom's Dyno sits at 4500 feet above sea level.  [smiley=nixweiss.gif]

[GC_Super]

In Jeffs case, wouldn't the fact that because both dynos are STD, the cam comparison between those two dynos would be valid, would it not?   [smiley=confused5.gif]

[grc]

In Jeffs case, wouldn't the fact that because both dynos are STD, the cam comparison between those two dynos would be valid, would it not?   [smiley=confused5.gif]

Same dyno, same operator/tuner  >  the comparison should be valid.  As long as you don't compare absolute numbers with someone else on a different dyno, it's all good.

Jerry

[Unbalanced]

It only allows you to compare that same bike to that same bike.   By doing it in SAE you get a slightly lower number for variances you also get a standard that everyone excepts and allows you to compare it more apples to apples.

The other thing is it also makes the tuner look better if he gives you a 115 over 115 in SAE than does a print out in STD and its 119/118 you are more impressed

[HDMonsterTorque]

"Same dyno, same operator/tuner  >  the comparison should be valid.  As long as you don't compare absolute numbers with someone else on a different dyno, it's all good. "

Add  same weather: same temperature, same barometic pressure, same humidity.

Conclusion : use a correction factor!

[hd-dude]

"Same dyno, same operator/tuner  >  the comparison should be valid.  As long as you don't compare absolute numbers with someone else on a different dyno, it's all good. "

Add  same weather: same temperature, same barometic pressure, same humidity.

Conclusion : use a correction factor!

See this thread, http://flhrsei.org/cgi-bin/yabb/YaBB.cgi?num=1133109033/0
In it you will find Jeff's dyno printed in both STD and SAE format. There is only a .2 difference in hp and a .4 difference in tq. Same dyno runs printed in the 2 formats.