Yamaha Star Bolt Motorcycle Forum

Yamaha Star Bolt Categories => Technical Discussion => Topic started by: Brandon94 on July 24, 2021, 08:46:16 am

Title: Ivanís vs Power commander V for decel pop
Post by: Brandon94 on July 24, 2021, 08:46:16 am
Iím hoping to find someone that has experience with both options and can offer an opinion on which would do a better job at lessening decel pop. I have the Vance and Hines slip on and the Vo2 intake. Decel pop is horrendous and sometimes when shifting from first to second, if I get on the throttle during a pop it will cause the bike to stutter and intake burp. Iíve already read many threads and I have verified that with my setup, the bike is in fact running a lean 18.1:1 AFR at low rpm cruising speeds. I have been unable to find out if Ivanís flash adds fuel to the low RPM range (around 3,00) but I do know he added fuel up top at WOT but that isnít where I have issues. My previous bike was an R6 and the power commander I had on that bike made it run very rich so Iím hesitant to go with the power commander, but Iím also doubtful that Ivanís will do much to correct low RPM decel popping
Title: Re: Ivanís vs Power commander V for decel pop
Post by: DrM on July 24, 2021, 11:54:27 am
Just my opinion, and no doubt others here might disagree.  But the throttle grip only rotates less than 1/4 turn from fully closed to fully open, so it is easy to twerk it, unbeknownst, or if you are a deliberate throttle "blipper" (which is the same as twerking), adding fuel into a lean mixture and getting backfire.  So I would venture a guess that it is mostly your restless wrist that is to blame.  You might also want to check that you don't have extra play in the throttle grip.
Title: Re: Ivanís vs Power commander V for decel pop
Post by: lunkhead on July 24, 2021, 04:38:22 pm
The PC can only add more fuel based on percentage. In fuel cut mode, NO fuel is being delivered so you could set a PC to add 100% more fuel but any percentage of nothing is still nothiing. You have to disable the fuel cut in the ECU first. Ivan's flash also changes the fuel curves so fuel is added where needed.
Title: Re: Ivanís vs Power commander V for decel pop
Post by: AlphaFury on July 26, 2021, 08:18:25 am
Iím hoping to find someone that has experience with both options and can offer an opinion on which would do a better job at lessening decel pop. I have the Vance and Hines slip on and the Vo2 intake. Decel pop is horrendous and sometimes when shifting from first to second

PCV has limitations that ECU flashes do not. See below.

I have a VH VO2 intake and VH slip on. I also "had" a PCV and called and talked to PC and got the best possible map for my setup. The decel popping and less than stellar throttle smoothness never changed. Sold the PCV and got the Ivan's Flash. Runs perfectly and all issues are solved.


The PC can only add more fuel based on percentage. In fuel cut mode, NO fuel is being delivered so you could set a PC to add 100% more fuel but any percentage of nothing is still nothiing. You have to disable the fuel cut in the ECU first. Ivan's flash also changes the fuel curves so fuel is added where needed.

Agreed.
Title: Re: Ivanís vs Power commander V for decel pop
Post by: Brandon94 on July 26, 2021, 05:29:03 pm
Iím hoping to find someone that has experience with both options and can offer an opinion on which would do a better job at lessening decel pop. I have the Vance and Hines slip on and the Vo2 intake. Decel pop is horrendous and sometimes when shifting from first to second

PCV has limitations that ECU flashes do not. See below.

I have a VH VO2 intake and VH slip on. I also "had" a PCV and called and talked to PC and got the best possible map for my setup. The decel popping and less than stellar throttle smoothness never changed. Sold the PCV and got the Ivan's Flash. Runs perfectly and all issues are solved.


The PC can only add more fuel based on percentage. In fuel cut mode, NO fuel is being delivered so you could set a PC to add 100% more fuel but any percentage of nothing is still nothiing. You have to disable the fuel cut in the ECU first. Ivan's flash also changes the fuel curves so fuel is added where needed.

Agreed.

Awesome, sounds like the Flash will do much more to correct the decel popping
Title: Re: Ivanís vs Power commander V for decel pop
Post by: Brandon94 on July 26, 2021, 05:30:56 pm
Just my opinion, and no doubt others here might disagree.  But the throttle grip only rotates less than 1/4 turn from fully closed to fully open, so it is easy to twerk it, unbeknownst, or if you are a deliberate throttle "blipper" (which is the same as twerking), adding fuel into a lean mixture and getting backfire.  So I would venture a guess that it is mostly your restless wrist that is to blame.  You might also want to check that you don't have extra play in the throttle grip.

I will blip the throttle sometimes but even if Iím just letting the bike engine brake down with the throttle closed and on the brakes it will pop. I will also get pops in between shifts which is probably what I dislike the most
Title: Re: Ivanís vs Power commander V for decel pop
Post by: aussybolt on July 27, 2021, 05:03:03 am
me i love the pops love em :)
Title: Re: Ivanís vs Power commander V for decel pop
Post by: YAMAHAULER1 on July 31, 2021, 09:05:13 pm
Ivan's Flash, the only name you need to know +100% with Lunk & Alpha!