Dyno tomoro

Yeah I was happy with the results and the bike runs good at wide open and is it ever frickin loud at 6000+ rpm Cause it dont sound that loud when I am on it I am sure that it was hurting the ears of the Harley guys at the Harley dealer down the road 500 yards . but the eng still is stumbling wen I am trying to go slow in town like 40 klm
 
Stumbling & jerky response at low speed is too lean. Mine did that till I played around with the bottom end fuelling on Tuneboy( below 10% throttle & below 2k revs, add 3-4% fuel)
 
blastedbones said:
Stumbling & jerky response at low speed is too lean. Mine did that till I played around with the bottom end fuelling on Tuneboy( below 10% throttle & below 2k revs, add 3-4% fuel)
Click to expand...

Does yours sound different at low rpms? My HD friends thought I had changed the cams:smoking:
 
One other thing to ask, you using decent fuel? In my experience, once tuned the bike hates the cheapest stuff, but runs perfect on mid price premium fuel.
Pretty certain that, if you are using good fuel, it's just too lean at low revs.( need a Tuneboy to simple fix that)
 
Hi all,

Looking at axel's dyno chart, the torque and HP curves cross a bit below 5k rpm whereas normally they should cross at a little over 5k. Any ideas as to what might have caused the incongruity?

Regards,
Mark
 
First thing I noticed, Mark and I hate dyno graphs like this.

The scales are different. left side top number is 140, right side top number is 150.

This makes the crossover point lower than the 5250 it should be if the scales matched but the numbers are still accurate.

The match checks, max tq of 145.5 is at about 3100 RPM.

145.5 / 5250 * 3100 = 85.91

Max power is at around 6660 RPM and torque at that time looks to be 107

107 / 5250 * 6660 = 135.73
 
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