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[CVOhog1]

I have a 2015 FLHXSE with V&H Power Dual Header and High Out Put Mufflers, stock SE air intake. The bike was dyno tuned by a reputable TTS tuner. This issue we are having is decel pop between shifts and on decel. My Tech is communicating with Steve from TTS to resolve this. Just curious if anyone else on this forum has a similar setup with this issue, any suggestions on a resolution.     


 

[cvosjoe]

I have a 2015 FLHXSE with V&H Power Dual Header and High Out Put Mufflers, stock SE air intake. The bike was dyno tuned by a reputable TTS tuner. This issue we are having is decel pop between shifts and on decel. My Tech is communicating with Steve from TTS to resolve this. Just curious if anyone else on this forum has a similar setup with this issue, any suggestions on a resolution.     

I too have had the same issue with the new bikes (2014 and 2015 110 CI). I have Fullsac DX pipe, 2.25 cores and TTS tuner. I had mine dyno tuned as well by a reputable tuner and I noticed the same results as you. The tuner made some changes to my map based on the feedback I provided him. We were able to eliminate most of the decal pop and the pop between shifts. It still occasionally pops but no where near as bad as when it was first tuned. I believe they made significant changes to the ECM for 2014 and 2015 bikes that still needs to be figured out by the tuners. I have several friends with new bikes with the same combination as me that are having the same issue as well. It would be nice if Steve would give some feedback on this as I believe he might be aware of this issue.

[CVOhog1]

covsjoe,

On one hand i am sorry to hear that you are experiencing the same issue, on the other I am relieved it is not just my bike. Hopefully this issue can be eliminated.

[North Georgia Hawg]

You asked for suggestions, so here goes...

I don't know about the new CANBUS ECMs, but a trick to eliminate decel pop is to richen up the main lambda table first column by 5% at a time in the RPM cells where the decel pop is occurring, until the decel pop goes away.

This approach is discussed in the TTS Tuning Guide. I think it's a better approach then messing too much with the Decel Enleanment table, because DE mode is only effective for a short time, whereas the main lambda table is always effective. Even if you decel hard and long, changes to the main lambda table first column will be effective for as long as you decel.

After we tuned my bike with the Dragula and the SE 259e cams, I had to richen up my main lambda table first column by 15% between 1750 and 3000 RPM to eliminate my decel popping. It still pops on occasion, and it really didn't like running down at sea level on a recent trip to Panama City Beach. Popped like crazy down there, but runs fine up here in North Georgia!

Ken

[FLSTFI Dave]

Doc will be tuning my Bike this coming Saturday.  Hard to find a much better tuner than Doc.  My 13 CVO with a built motor never pops, and is as smooth as can be.  I know he has tuned a friends 14, and it still had an occasional pop, see post early in this thread.

I am sure Doc will do a great job.  Hopefully there will be no pop on Deceleration.

[Jswerve]

There are plenty of reputable tuners in each location of the US. Gotta do some research in your region. I take my bike to Doug Lofgren in the Minnesota area. Legendary. Good luck with your search.

[CVOhog1]

I am pretty confident my guy with get it dialed in. Looking more to see what others have experienced with the new 14 and newer shower head motor ECM's. 

[CVOhog1]

Thanks Steve,
I believe George from Moroney's  HD has been in contact with you regarding this. Any advice/ recommendations are greatly appreciated.

[FLSTFI Dave]

Doc did the tune on My 15 CVO.  Pretty much the 14 and 15 pop more at deceleration than the non canbus bikes.  But the tuner can resolve that.  I only had one, maybe two pops in the 750 miles or so since Doc tuned it saturday.  103 do not seem as sensitive to the pop, as my wife's 15 with the Fullsac DX, 2.25 cores in CVO mufflers ventilator heather and fullsac map almost never pops.  My 110 poped bad with a base map for it.  So had to have it tune, and the Hp and Torque gains and no popping made it worth it

[CVOhog1]

picked up the bike after some follow-up tuning. George was able to eliminate most of the decel pop but some is still there. He says it is a function of the new CAN ECM and the large diameter of the mufflers. Bike runs great other than an occasional pop.

[Jswerve]

picked up the bike after some follow-up tuning. George was able to eliminate most of the decel pop but some is still there. He says it is a function of the new CAN ECM and the large diameter of the mufflers. Bike runs great other than an occasional pop.

Interesting that you can't completely eliminate pop on a 14 or newer. I have zero pop at any range under any load.

[CVOhog1]

Yeah I had zero pop on my 13 CVO UCEG and my 12 Street Glide after tuning with the exact same pipes. 

[Jswerve]

Yeah I had zero pop on my 13 CVO UCEG and my 12 Street Glide after tuning with the exact same pipes.

Thanks for the input. Good to know.

[Dr.D]

Interesting that you can't completely eliminate pop on a 14 or newer. I have zero pop at any range under any load.

2014 CVO Limited, Fullsac Dx pipe with 1.75 cores and a TTS tune. Never have heard a pop in 3500 miles.

[CVOhog1]

It's nice to have a bike that's properly tuned and does not have any decel pop.  The difference may be the 1.75 cores you have in your mufflers. My tuner feels the 4 1/2" High Output mufflers are what is causing the pop. I may try putting the stock mufflers on to see if his theory is correct.