Ping with Sudden Throttle
Ultimate HDF Member
Joined: Jan 2009
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From: East Tn Foot of The Dragon
================
Not a bad rec at all that may in fact reduce or stop the ping .
But that will likely be a temporary fix because a few k miles later carbon will already be building back up in the comb chambers again and the ping will return sooner then later in summer heat.
Heat is a big factor when talking detonation esp in an air cooled hd motor in extreme 98deg f heat so running a healthy dose of techron (Concentrated version is best!) is never a bad idea to do 2x-3x maybe even 4x yrly depending on mileage riden.
Doing that should maintain clean injectors & comb chambers in an EFI HD that ensures a better smooth running motor with max perf at all times.
I run a healthy does (1.5oz's per gal fuel) of Techron's concentrated version right before every motor oil & filter change on my HD which equates to approx 2x yrly for my bike.
But if you want to address the real issue in this case of an air cooled HD motor suffering heat related issues & detonating in 98deg f addressing the heat issue is what to go after which at the same time results in multiple improvements in engine perf & overall rider comfort @ the same time too like i rec & posted earlier in this thread.
Happy Motoring.
Scott
Not a bad rec at all that may in fact reduce or stop the ping .
But that will likely be a temporary fix because a few k miles later carbon will already be building back up in the comb chambers again and the ping will return sooner then later in summer heat.
Heat is a big factor when talking detonation esp in an air cooled hd motor in extreme 98deg f heat so running a healthy dose of techron (Concentrated version is best!) is never a bad idea to do 2x-3x maybe even 4x yrly depending on mileage riden.
Doing that should maintain clean injectors & comb chambers in an EFI HD that ensures a better smooth running motor with max perf at all times.
I run a healthy does (1.5oz's per gal fuel) of Techron's concentrated version right before every motor oil & filter change on my HD which equates to approx 2x yrly for my bike.
But if you want to address the real issue in this case of an air cooled HD motor suffering heat related issues & detonating in 98deg f addressing the heat issue is what to go after which at the same time results in multiple improvements in engine perf & overall rider comfort @ the same time too like i rec & posted earlier in this thread.
Happy Motoring.
Scott
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Joined: Mar 2011
Posts: 3,481
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From: NorCal Rocklin
I had that same issue. Called the dealer, and the dealer told me not to do that. Especially at low rpm. Recommended the roll on method. He was telling me regardless if it was tuned properly it will still ping if you do a Wide Open Throttle at low rpm
Weird right???
Weird right???
Ultimate HDF Member
Joined: Jan 2008
Posts: 6,532
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From: SoCal
Gas type has ZERO effect on ping.E-10 is perfectly fine. Just use the highest octane possible in your case.
Grand HDF Member
Joined: Sep 2013
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From: Michigan
Spent 35+ years working in fuels & lubricants research. Did a lot of "octane testing" in the automotive industry before the incorporation of knock sensor technology into engine management scheme.
Ultimate HDF Member
Joined: Jan 2008
Posts: 6,532
Likes: 132
From: SoCal
Gas type DOES have something to do with spark knock (ping). Running a winter grade fuel (high RVP) in high ambient summer temperatures will intensify any tendency for knocking. Changing to a lower RVP fuel (summer grade) will lessen chances for knock. The fuels in different regions of the country and at different times of the year will vary significantly. E10 will actually have a higher RON than the base stock it is blended with, so it can decrease the knock, providing the engine sensitivity to RON is higher than sensitivity to A/F ratio (E10 runs a bit leaner in engines w/o O2 sensors, ie open-loop systems).
Spent 35+ years working in fuels & lubricants research. Did a lot of "octane testing" in the automotive industry before the incorporation of knock sensor technology into engine management scheme.
Spent 35+ years working in fuels & lubricants research. Did a lot of "octane testing" in the automotive industry before the incorporation of knock sensor technology into engine management scheme.
Grand HDF Member
Joined: Sep 2013
Posts: 3,820
Likes: 587
From: Michigan
FYI for qtrracer:
RON is determined using a CFR engine per ASTM procedures. A fuel with a 100 RON rating has the same resistance to knock as iso-octane fuel. Normal-heptane is the other end of the scale. A fuel with a 93 RON has knock resistance equivalent to a blend of 93% iso-octane and 7% normal-heptane.
There is a separate ASTM procedure that defines criteria for determining the MON (motor octane number), which is generally 8 to 12 numbers less than the RON and is defined as that fuel's sensitivity.
The octane numbers posted on gas pumps are the average of the RON & MON numbers [ (R+M)/2 ]. When a manufacturer recommends a 93 RON fuel, a gas pump rating of 91 average rating will generally satisfy the recommendation.
RON is determined using a CFR engine per ASTM procedures. A fuel with a 100 RON rating has the same resistance to knock as iso-octane fuel. Normal-heptane is the other end of the scale. A fuel with a 93 RON has knock resistance equivalent to a blend of 93% iso-octane and 7% normal-heptane.
There is a separate ASTM procedure that defines criteria for determining the MON (motor octane number), which is generally 8 to 12 numbers less than the RON and is defined as that fuel's sensitivity.
The octane numbers posted on gas pumps are the average of the RON & MON numbers [ (R+M)/2 ]. When a manufacturer recommends a 93 RON fuel, a gas pump rating of 91 average rating will generally satisfy the recommendation.
Last edited by Hammz; Jul 7, 2016 at 09:28 PM.
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