Advice Setting Vieds
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Cruiser
Joined: Jul 2012
Posts: 143
Likes: 0
From: North Carolina
Advice Setting Vieds
I was running the FL-vieds on 75% with stock head pipe and 3.5" Rineharts. I just had my catless head pipe installed Friday. I adjusted the vieds back to 50% according to the vied instructions. When I rev up the motor it would pop very loud on decel, so I adjusted back to 75% no popping. I rode the bike approximately 100 miles today. I thought the bike ran good, very little popping on decel. Is anyone else running vieds at 75% with similar setups. I have seen many post that most people are running them at 50%. Just trying to figure out why mine would run different and if I needed to try 25% or not. Any advice would be great.
Thanks
Jeff
Thanks
Jeff
Road Warrior
Joined: Aug 2007
Posts: 1,599
Likes: 7
From: Hoffman Estates, IL
I was advised to go on a good, long ride before any further adjustment... I backed mine off at one point and got some decel popping right away but it went away after an afternoon spin (maybe 75 miles).
Grand HDF Member
Joined: Mar 2013
Posts: 4,922
Likes: 589
From: Running with the gators
2013 Heritage, Vance and Hines Straight Shot slip on's, stock A/C. Vied's running at 60%. Little decel popping. Tomorrow I will try increasing them to 75% and see what happens.
Intermediate
Joined: Jul 2012
Posts: 48
Likes: 0
From: Weldon Spring, MO
I have catless header, stock AC and RC Components slip ons on my 13 FLHTCU and was advised by Steve to set them at 75%. Running great since I installed them about a month ago with no decel popping. He did say if it was too loud to back it down to 50% but it sounds perfect to me.
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Tourer
Joined: Aug 2007
Posts: 312
Likes: 1
From: Vancouver BC
Here is a post with pics showing spark plugs set at 75%. It was started by my husband on another forum. Hope it's okay to post.
Ironically we havent installed the Vied's on my stock 2012 CVORG yet. We will soon though. We always ride together and when my bike goes into heat management mode, my husband's bike doesnt. I've been a little stubborn wanting to keep my bike stock but I think I'll cave here and get these put on my bike.
http://www.roadglide.org/showthread.php?t=19516
Ironically we havent installed the Vied's on my stock 2012 CVORG yet. We will soon though. We always ride together and when my bike goes into heat management mode, my husband's bike doesnt. I've been a little stubborn wanting to keep my bike stock but I think I'll cave here and get these put on my bike.
http://www.roadglide.org/showthread.php?t=19516
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Seasoned HDF Member
Joined: Sep 2009
Posts: 17,145
Likes: 6,168
From: SE Michigan
I asked Steve, who makes them, this very question, here's his answer:
"Generally the VIED's want settings around the 25% rich area once the converter is removed. This is actually to compensate for reversion bringing fresh air to the sensors (which is seen as a lean mixture and actually adds some fuel), so the VIED needs to be 'turned down' some to compensate. The net effect is you are still running (and adjusting) to get the ECM to run in closed loop at 14.0:1, but you have to back off on the VIED settings to stabilize the voltage readings with the lower settings because of the fresh air that can get to the O2 sensors with the converter removed."
"Generally the VIED's want settings around the 25% rich area once the converter is removed. This is actually to compensate for reversion bringing fresh air to the sensors (which is seen as a lean mixture and actually adds some fuel), so the VIED needs to be 'turned down' some to compensate. The net effect is you are still running (and adjusting) to get the ECM to run in closed loop at 14.0:1, but you have to back off on the VIED settings to stabilize the voltage readings with the lower settings because of the fresh air that can get to the O2 sensors with the converter removed."
Seasoned HDF Member
Joined: Oct 2012
Posts: 11,217
Likes: 3,046
From: St.Louis Mo.
I asked Steve, who makes them, this very question, here's his answer:
"Generally the VIED's want settings around the 25% rich area once the converter is removed. This is actually to compensate for reversion bringing fresh air to the sensors (which is seen as a lean mixture and actually adds some fuel), so the VIED needs to be 'turned down' some to compensate. The net effect is you are still running (and adjusting) to get the ECM to run in closed loop at 14.0:1, but you have to back off on the VIED settings to stabilize the voltage readings with the lower settings because of the fresh air that can get to the O2 sensors with the converter removed."
"Generally the VIED's want settings around the 25% rich area once the converter is removed. This is actually to compensate for reversion bringing fresh air to the sensors (which is seen as a lean mixture and actually adds some fuel), so the VIED needs to be 'turned down' some to compensate. The net effect is you are still running (and adjusting) to get the ECM to run in closed loop at 14.0:1, but you have to back off on the VIED settings to stabilize the voltage readings with the lower settings because of the fresh air that can get to the O2 sensors with the converter removed."
