The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Era Specific and Model Specific > Ironhead Sportster Motorcycle Talk (1957-1985)
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

Active Threads
0 An Ohio Meet 'N' Eat
Last Post: sportsterpaul
Posted On: 12 Minutes Ago
Replies: 18
Views: 462
0 Need help with S&S GB carb
Last Post: Hippysmack
Posted On: 13 Minutes Ago
Replies: 17
Views: 361
0 Transformer XR1200
Last Post: sportsterpaul
Posted On: 16 Minutes Ago
Replies: 59
Views: 4,111
0 Starting woes :(
Last Post: sportsterpaul
Posted On: 24 Minutes Ago
Replies: 8
Views: 268
0 Seeley Ironhead race bike
Last Post: ex119x
Posted On: 29 Minutes Ago
Replies: 14
Views: 720
0 This week on Craig's list
Last Post: Ferrous Head
Posted On: 43 Minutes Ago
Replies: 4,282
Views: 508,427
0 Tired of hearing the Sportster is a girls bike (The one and only Girly Bike Thread)
Last Post: ZCarFan
Posted On: 55 Minutes Ago
Replies: 3,912
Views: 764,305
0 What did you do for your sporty Today?
Last Post: Boil1337
Posted On: 58 Minutes Ago
Replies: 6,340
Views: 813,072
0 Vote for Most Sought After Sportster
Last Post: Ferrous Head
Posted On: 1 Hour Ago
Replies: 327
Views: 72,473
0 Have my cake and eat it too? 1275 + 570s + CVJ
Last Post: Maxeffort
Posted On: 1 Hour Ago
Replies: 9
Views: 217
3 Wtb, Wts, Wtt, Wtg (Ironhead)
Last Post: 02vette
Posted On: 2 Hours Ago
Replies: 61
Views: 236,002
0 Hottie of the day, no nudity.
Last Post: trainman
Posted On: 2 Hours Ago
Replies: 13,724
Views: 1,264,418
14 Post your Bike in a Cemetary Pic
Last Post: Lone Rider
Posted On: 2 Hours Ago
Replies: 352
Views: 63,136
0 Show your bike next to an abandoned building
Last Post: Lone Rider
Posted On: 2 Hours Ago
Replies: 47
Views: 11,659
0 New rider, first ride
Last Post: Testostebro
Posted On: 2 Hours Ago
Replies: 0
Views: 31
0 Crusty's Travels
Last Post: Crusty
Posted On: 2 Hours Ago
Replies: 2,394
Views: 309,165
0 70 XLCH Piston, Connecting rod issue
Last Post: ryder rick
Posted On: 2 Hours Ago
Replies: 58
Views: 2,369
0 dual carb heads on ebay
Last Post: ryder rick
Posted On: 3 Hours Ago
Replies: 10
Views: 600
0 hmmm, whaddaya think? (Footpeg Location)
Last Post: slcharger
Posted On: 3 Hours Ago
Replies: 111
Views: 24,748
0 My 1988 basket case has a belt? Should I keep it?
Last Post: Flame__
Posted On: 3 Hours Ago
Replies: 0
Views: 32
0 Further forward mids on pre-2014 models
Last Post: Joe_jeep
Posted On: 3 Hours Ago
Replies: 2
Views: 92
0 Sparkplugs & Sparkplug Wires
Last Post: Joe_jeep
Posted On: 3 Hours Ago
Replies: 5
Views: 134
0 My Iron
Last Post: Highly-Dangerous
Posted On: 4 Hours Ago
Replies: 6
Views: 1,201
0 69/50 Fest: The 50th Anniversary of the 1969 Sportster (Fall 2019 GBB) 9/14/19
Last Post: brucstoudt
Posted On: 4 Hours Ago
Replies: 61
Views: 4,257
0 Bad Primary Oil Leak
Last Post: ezmerf
Posted On: 4 Hours Ago
Replies: 13
Views: 409
6 SPORTY BOBBER PICTURES
Last Post: wedge
Posted On: 4 Hours Ago
Replies: 6,010
Views: 5,438,847
0 Helmets Please...
Last Post: webman94
Posted On: 5 Hours Ago
Replies: 238
Views: 54,571
0 Lake Ozark Bikefest
Last Post: Bow only
Posted On: 5 Hours Ago
Replies: 26
Views: 549
0 The TAT Sportster
Last Post: steveolds
Posted On: 5 Hours Ago
Replies: 40
Views: 1,004
0 Rush or Khromewerks slip ons?
Last Post: Glamazon
Posted On: 5 Hours Ago
Replies: 47
Views: 994
More...
Members Birthdays
Zanzibar, stvmike (65), Leroywulf (61), Erik (58), SoCal Harley (53), drew96 (41), Reverend_d (39)
Sponsored Links
Reply
 
Share Thread Tools Display Modes
  #11  
Old 3 Weeks Ago
Iron Mike Iron Mike is offline
Senior Chief Know It All 1st Class
 
Join Date: Dec 2014
Location: Phoenix
Posts: 1,126
Sportster/Buell Model: xlch
Sportster/Buell Year: 1964
Sportster/Buell Model #2: XLCH IR EFI
Sportster/Buell Year #2: 1971
Other Motorcycle Model: BMW K1200RS
Other Motorcycle Year: 2001
Reputation: 255457
Iron Mike has a brilliant futureIron Mike has a brilliant futureIron Mike has a brilliant futureIron Mike has a brilliant futureIron Mike has a brilliant futureIron Mike has a brilliant futureIron Mike has a brilliant futureIron Mike has a brilliant futureIron Mike has a brilliant futureIron Mike has a brilliant futureIron Mike has a brilliant future
Default

or RJ12YC for Res.
Reply With Quote
  #12  
Old 3 Weeks Ago
GA_Ironhead GA_Ironhead is offline
Senior Master Custom Bike Builder
 
Join Date: Mar 2006
Location: Athens, GA
Posts: 5,093
Sportster/Buell Model: XLCH
Sportster/Buell Year: 1962
Reputation: 172560
GA_Ironhead has a brilliant futureGA_Ironhead has a brilliant futureGA_Ironhead has a brilliant futureGA_Ironhead has a brilliant futureGA_Ironhead has a brilliant futureGA_Ironhead has a brilliant futureGA_Ironhead has a brilliant futureGA_Ironhead has a brilliant futureGA_Ironhead has a brilliant futureGA_Ironhead has a brilliant futureGA_Ironhead has a brilliant future
Default

The 216 is nonresistor.
__________________
Merely dying will not get your name removed from the enemies list!
Reply With Quote
  #13  
Old 3 Weeks Ago
ryder rick's Avatar
ryder rick ryder rick is offline
Senior Master Custom Bike Builder
 
Join Date: Jun 2008
Location: Cornelius, OR
Posts: 8,539
Reputation: 756911
ryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond repute
Default

Quote:
Originally Posted by cazz1000 View Post
ryder rick,,,, why does a extended tip plug need less advance,,,, and what would u recommend with the ult iggy,,,, thks cazz,,,
It's not that an extended tip plug needs less advance and more that a lawn mower plug needs more advance.

The difference is just a degree or 2, it's not reduced as much as a dual plug setup.

An Ironhead combustion chamber is a very poor design and that is why it needs more advance. Anything you can do to improve that will require less advance.
The extra advance is needed because the piston dome divides the cylinder and blocks flame travel.
The down side of that is that the increased advance puts you closer to detonation, it narrows your tuning window.
It increases the susceptibility for detonation because the cylinder pressure rises before all the fuel gets lit.
And remember the piston is still rising as that fuel is lighting.
Throw in high ambient temps and a tank of bad gas and BOOM! you fall outside your tuning window.
__________________
Ryder Rick "You want some aura, Dora? Right here on the flora?"
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



Sponsored Links
All times are GMT +1. The time now is 03:03.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC