The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Electrical > Sportster Motorcycle Electrical and Ignition
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Active Threads
0 FNG from Oregon
Last Post: harley506d
Posted On: 35 Minutes Ago
Replies: 3
Views: 40
0 Sup yall
Last Post: harley506d
Posted On: 35 Minutes Ago
Replies: 8
Views: 90
0 Mid West Meet & Greet
Last Post: Bow only
Posted On: 36 Minutes Ago
Replies: 372
Views: 29,796
0 Hello from Centurion, Gauteng, South Africa
Last Post: harley506d
Posted On: 37 Minutes Ago
Replies: 7
Views: 83
0 Help me identify this bike
Last Post: AKL1
Posted On: 1 Hour Ago
Replies: 7
Views: 234
0 Never seen this before...
Last Post: smac74
Posted On: 2 Hours Ago
Replies: 45
Views: 3,721
0 Mikuni 42 on 883
Last Post: rocketmangb
Posted On: 2 Hours Ago
Replies: 30
Views: 1,298
0 Diagnostic code ?
Last Post: Crusty
Posted On: 3 Hours Ago
Replies: 13
Views: 140
0 Hottie of the day, no nudity.
Last Post: ronccc
Posted On: 3 Hours Ago
Replies: 17,783
Views: 1,791,567
0 My take on the world ~ Photo by Trace
Last Post: sportytrace
Posted On: 4 Hours Ago
Replies: 1,026
Views: 140,190
0 Marrying used speedometer
Last Post: decman
Posted On: 4 Hours Ago
Replies: 2
Views: 60
0 68 XLCH - Insight Plz
Last Post: Iron Mike
Posted On: 5 Hours Ago
Replies: 35
Views: 822
0 Iree's late night cafe
Last Post: sportytrace
Posted On: 5 Hours Ago
Replies: 1,429
Views: 189,467
0 What did you do for your sporty Today?
Last Post: sportsterpaul
Posted On: 5 Hours Ago
Replies: 6,726
Views: 928,015
0 WTB saddlebags
Last Post: Jcolleyoh
Posted On: 5 Hours Ago
Replies: 5
Views: 154
0 XL Forum will now be the Suzuki Intruder Forum
Last Post: rokytnji
Posted On: 5 Hours Ago
Replies: 33
Views: 854
0 You asked for it! "The Tess' Coffee Thread"
Last Post: sportsterpaul
Posted On: 6 Hours Ago
Replies: 11,034
Views: 979,683
0 What did you do to your EFI Sporty today?
Last Post: mastiffhound
Posted On: 6 Hours Ago
Replies: 3,959
Views: 775,078
0 Corona Virus
Last Post: Kbetts
Posted On: 6 Hours Ago
Replies: 275
Views: 14,325
0 15 min rides
Last Post: doodah man
Posted On: 6 Hours Ago
Replies: 50
Views: 1,174
0 Keep & Kill
Last Post: Crusty
Posted On: 6 Hours Ago
Replies: 16,196
Views: 922,414
0 Do people notice your bike?
Last Post: boomerguy
Posted On: 6 Hours Ago
Replies: 1,222
Views: 339,144
0 This week on Craig's list
Last Post: RicThompson
Posted On: 7 Hours Ago
Replies: 4,593
Views: 589,109
0 Amazing without the windshield.
Last Post: boomerguy
Posted On: 7 Hours Ago
Replies: 207
Views: 44,557
0 Carby cough
Last Post: connorneil13
Posted On: 7 Hours Ago
Replies: 0
Views: 40
0 HF bike lift
Last Post: Bryan83taco
Posted On: 7 Hours Ago
Replies: 7
Views: 131
0 1986-90 Evo Sportsters: What every owner should know but were afraid to ask
Last Post: Hippysmack
Posted On: 7 Hours Ago
Replies: 383
Views: 53,236
0 Need help picking new mufflers
Last Post: Joe_jeep
Posted On: 8 Hours Ago
Replies: 7
Views: 343
0 cycle shack 1.75" slip ons without a tune?
Last Post: Joe_jeep
Posted On: 8 Hours Ago
Replies: 3
Views: 339
0 What if? race ITT 1250
Last Post: Tomcatt
Posted On: 8 Hours Ago
Replies: 13
Views: 397
More...
Members Birthdays
garyschmidt (78), JicJac (70), alleybabe (62), Galewarning (56), wngdweeler (51), scooter (47), kariglam1 (45), HERDYAN (45), V-XL (43)
Tags
harley, ignition, modified, vacuum, voes

Reply
 
Share Thread Tools Display Modes
  #1  
Old 20th August 2019
groovemeisterus's Avatar
groovemeisterus groovemeisterus is offline
Land Speed Record
 
Join Date: Sep 2006
Posts: 731
Sportster/Buell Model: XL883-1200 Branch Build
Sportster/Buell Year: 2000
Reputation: 8721
groovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of light
Question VOES Vacuum reading after engine mod... where to set?

Got a 6" specked VOES because my old one went went bad. Noticed during riding fast all was good, but when slowed down and at stop sign and or stop light engine sounded like was over heating (after long ride), and or in advance for to long.

This is a slow mow of Vacuum gauge to show where Vacuum is at idle, and engine warmed up. VOES I bought is set to 6". After riding long distance I noticed I probably need to change the setting to a lower Vacuum setting cause of riding too much with ignition in advance has caused weird sounds like over heating etc.

Probably because VOES is set to high? Might need to adjust screw to lower than 5" vacuum?

Anyone want to provide feedback on this video of vacuum gauge showing vacuum during idle, and where to first possibly adjust the VOES first? Bike setup is in signature. CN't seem to embed in thread like I used to be able to do.

https://youtu.be/dntWQvw3SUU
__________________
883 XL Y2K - BLACK,Ported Manifold,HSR 42mm Carb,Branch #5 Ported 883 Heads,Bob Woods W8S 0.590" Cams, SE -0.050" Perfect Fit Pushrods,SE 1200 Ignition Module ,Vance & Hines Straight Shot Exhaust,07 SE Air Cleaner,SE 40,000V Red Perf Coil,883 Jugs Precision Bored for Branch 30º Domed Pistons,& One Big Smile ;o), ~83TQ, ~83HP for now.
Reply With Quote
  #2  
Old 20th August 2019
bustert's Avatar
bustert bustert is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2008
Posts: 9,839
Sportster/Buell Model: 1200s
Sportster/Buell Year: 2001
Sportster/Buell Model #2: xlch
Sportster/Buell Year #2: 1974
Reputation: 3014785
bustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond repute
Default

since voes is in the adv mode when running till you hit trip point, going to 5" only delays the sw to retard. i do not run voes at all! epa thingy!
vac reading is not of much help due to the way the cyls are filled. best to bench the voes and use vac gauge and meter to set.
Reply With Quote
  #3  
Old 20th August 2019
IXL2Relax's Avatar
IXL2Relax IXL2Relax is offline
XL FORUM TEAM MEMBER
 
Join Date: Feb 2013
Location: Let Freedom Ring in PA
Posts: 7,246
Sportster/Buell Model: Sportster 883►1200
Sportster/Buell Year: 1994
IXL2Relax has disabled reputation
Default

The Sportsterpedia section on the VOES has all that information:
http://sportsterpedia.com/doku.php/t...lectric_switch

What is typical vacuum setting, how to adjust it and other consideration...

IXL _______ >>>> My Motorcycle Chronicles Are Here <<<<
For FREE Sportster Tech Info from the XLForum:
Explore The Sportsterpedia - The Best Kept Secret on the XLForum!
__________________
### The ride is more enjoyable to nowhere in particular! ###
Reply With Quote
  #4  
Old 20th August 2019
groovemeisterus's Avatar
groovemeisterus groovemeisterus is offline
Land Speed Record
 
Join Date: Sep 2006
Posts: 731
Sportster/Buell Model: XL883-1200 Branch Build
Sportster/Buell Year: 2000
Reputation: 8721
groovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of light
Question Need to adjust from 6" to possibly 4.5" Vacuum

Quote:
Originally Posted by bustert View Post
since voes is in the adv mode when running till you hit trip point, going to 5" only delays the sw to retard. i do not run voes at all! epa thingy!
vac reading is not of much help due to the way the cyls are filled. best to bench the voes and use vac gauge and meter to set.
Already did that first. VOES is set to 6" vacuum from gauge and used DMM.

Then hooked up a Y connector to connect the VOES and gauge at same time, and seen during idle (after warmed up) that it would trip the VOES... and seen a reading down to 5".

So technically it seems that during idle, it is switching back and forth from Advance to Retard possibly.

Which almost explains that my ignition is using the retarted curve more often when cruising... causing engine to get hot and ping. As seen in the sporsterpedia.com in the VOES section.

Quote "Also note, if the VOES switching point is set too low, it will remain on the more advanced curve too long under mid-load acceleration and pinging will occur. This is the reason that engines with upgraded performance should have their VOES switch point increased (switch at a higher vacuum level) to better match the capabilities of the engine."

Gonna try and change from set point of 6" to 4.5" and see if that helps.
Reply With Quote
  #5  
Old 20th August 2019
IXL2Relax's Avatar
IXL2Relax IXL2Relax is offline
XL FORUM TEAM MEMBER
 
Join Date: Feb 2013
Location: Let Freedom Ring in PA
Posts: 7,246
Sportster/Buell Model: Sportster 883►1200
Sportster/Buell Year: 1994
IXL2Relax has disabled reputation
Default

That idle speed seems really low - Do you know what RPM that is??

IXL _______ >>>> My Motorcycle Chronicles Are Here <<<<
For FREE Sportster Tech Info from the XLForum:
Explore The Sportsterpedia - The Best Kept Secret on the XLForum!
Reply With Quote
  #6  
Old 21st August 2019
groovemeisterus's Avatar
groovemeisterus groovemeisterus is offline
Land Speed Record
 
Join Date: Sep 2006
Posts: 731
Sportster/Buell Model: XL883-1200 Branch Build
Sportster/Buell Year: 2000
Reputation: 8721
groovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of light
Default

Quote:
Originally Posted by IXL2Relax View Post
That idle speed seems really low - Do you know what RPM that is??

IXL _______ >>>> My Motorcycle Chronicles Are Here <<<<
For FREE Sportster Tech Info from the XLForum:
Explore The Sportsterpedia - The Best Kept Secret on the XLForum!
My idle is always around 1000 RPM. The video link from starting post goes into slow motion in order to see where the dial goes on the vacuum gauge so to see how normally is running with vacuum. Bike was all warmed up before took readings.

Last edited by groovemeisterus; 21st August 2019 at 01:00.. Reason: More info
Reply With Quote
  #7  
Old 21st August 2019
bustert's Avatar
bustert bustert is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2008
Posts: 9,839
Sportster/Buell Model: 1200s
Sportster/Buell Year: 2001
Sportster/Buell Model #2: xlch
Sportster/Buell Year #2: 1974
Reputation: 3014785
bustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond repute
Default

hummmm
the voes kills lead to reduce cyl heating
think something else is going on.
at idle, dropping to that low of a setting and tripping the voes sounds like a valve issue. if you have a leaky or sticking valve, it will pressurize the manifold, the wild vac needle swing points to that also.
run a leak down test
Reply With Quote
  #8  
Old 21st August 2019
groovemeisterus's Avatar
groovemeisterus groovemeisterus is offline
Land Speed Record
 
Join Date: Sep 2006
Posts: 731
Sportster/Buell Model: XL883-1200 Branch Build
Sportster/Buell Year: 2000
Reputation: 8721
groovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of light
Default

Quote:
Originally Posted by bustert View Post
hummmm
the voes kills lead to reduce cyl heating
think something else is going on.
at idle, dropping to that low of a setting and tripping the voes sounds like a valve issue. if you have a leaky or sticking valve, it will pressurize the manifold, the wild vac needle swing points to that also.
run a leak down test


During a running Engine at idle, there will not be a smooth set dampened reading from the gauge. It will flow with the 4 stroke engine always changing. Ran this test when first learned about the VOES. Vacuum is never steady state. Just the set point overlapping by an inch of vacuum changing ignition curves is probably not ideal.

If you did the same with gauge, you would understand it's not a valve issue. Just simple erratic vacuum with pistons going up a down changing the pressures.


Sent from my iPhone using Tapatalk
Reply With Quote
  #9  
Old 22nd August 2019
bustert's Avatar
bustert bustert is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2008
Posts: 9,839
Sportster/Buell Model: 1200s
Sportster/Buell Year: 2001
Sportster/Buell Model #2: xlch
Sportster/Buell Year #2: 1974
Reputation: 3014785
bustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond repute
Default

you need to snub your gauge.
the issue with hd is SHORT runner and off balance fueling and reversion when the valve closes.
it should not trip the voes
throw the gauge and meter on the machine and ride down the road and see what is happening under load.
my machine originally had map, went to ultima and voes. got rid of the voes due to clutch off ping issues and run rpm base timing. the voes is always trying to force adv on the engine. i had no issues with the voes doing as you say.

Last edited by bustert; 22nd August 2019 at 03:53..
Reply With Quote
  #10  
Old 22nd August 2019
groovemeisterus's Avatar
groovemeisterus groovemeisterus is offline
Land Speed Record
 
Join Date: Sep 2006
Posts: 731
Sportster/Buell Model: XL883-1200 Branch Build
Sportster/Buell Year: 2000
Reputation: 8721
groovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of lightgroovemeisterus is a glorious beacon of light
Default

Quote:
Originally Posted by bustert View Post
you need to snub your gauge.
the issue with hd is SHORT runner and off balance fueling and reversion when the valve closes.
it should not trip the voes
throw the gauge and meter on the machine and ride down the road and see what is happening under load.
my machine originally had map, went to ultima and voes. got rid of the voes due to clutch off ping issues and run rpm base timing. the voes is always trying to force adv on the engine. i had no issues with the voes doing as you say.


What I'm going to do. Plus cams can alter the vacuum also.


Sent from my iPhone using Tapatalk
Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT +1. The time now is 07:58.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC