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

Notices

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

Active Threads
0 sportster revival
Last Post: 1Scooter
Posted On: 7 Minutes Ago
Replies: 1
Views: 73
0 2007 Sportster 883 won’t start; no turn signals
Last Post: Viffer
Posted On: 16 Minutes Ago
Replies: 6
Views: 87
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: XL Ed
Posted On: 18 Minutes Ago
Replies: 52,557
Views: 8,870,882
0 Keep & Kill
Last Post: sportsterpaul
Posted On: 30 Minutes Ago
Replies: 25,626
Views: 1,498,867
0 71 XLH Value?
Last Post: Ferrous Head
Posted On: 1 Hour Ago
Replies: 46
Views: 1,544
0 Allegheny National Park III
Last Post: mikeLI_77
Posted On: 1 Hour Ago
Replies: 41
Views: 1,153
0 Oil coming out of top of cam cover
Last Post: Hippysmack
Posted On: 2 Hours Ago
Replies: 4
Views: 104
0 Snippets
Last Post: Crusty
Posted On: 2 Hours Ago
Replies: 525
Views: 74,232
0 1960 XLH Stroker – a 13 year journey
Last Post: Ferrous Head
Posted On: 4 Hours Ago
Replies: 23
Views: 1,047
0 72 ih stroker advise needed
Last Post: Ferrous Head
Posted On: 4 Hours Ago
Replies: 23
Views: 1,823
0 ‘T’ cams, anyone familiar?
Last Post: needspeed
Posted On: 5 Hours Ago
Replies: 5
Views: 154
0 Evo sportster Ignition Modules
Last Post: Stojan85
Posted On: 6 Hours Ago
Replies: 11
Views: 1,613
0 Grenade plate fix with XR1200 parts...
Last Post: ParrotHead
Posted On: 6 Hours Ago
Replies: 74
Views: 14,559
0 Food porn
Last Post: Stairman
Posted On: 6 Hours Ago
Replies: 2,563
Views: 610,616
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 7 Hours Ago
Replies: 33,124
Views: 3,909,233
0 Buell interview.
Last Post: shanneba
Posted On: 8 Hours Ago
Replies: 2
Views: 1,158
0 Sportster Tracker Wheel and Tire Questions
Last Post: Bluto
Posted On: 8 Hours Ago
Replies: 1
Views: 71
6 Secret photo"s of folkies loft
Last Post: DEEP DIVER
Posted On: 12 Hours Ago
Replies: 1,595
Views: 273,008
0 Acceptable Voltage Drop-Starter Circuit
Last Post: The Doctor71
Posted On: 13 Hours Ago
Replies: 62
Views: 2,332
0 04 Sportster refurb and build.
Last Post: ChinCactus
Posted On: 13 Hours Ago
Replies: 37
Views: 2,581
0 This is gonna hurt.
Last Post: cal43
Posted On: 15 Hours Ago
Replies: 9,089
Views: 2,129,889
0 video & pics
Last Post: cal43
Posted On: 15 Hours Ago
Replies: 585
Views: 62,985
0 Hot Chicks on Hot Bikes
Last Post: cal43
Posted On: 17 Hours Ago
Replies: 12,618
Views: 2,992,471
0 Electrical Harness Replacemet vs. Self Rewire
Last Post: jeffro57
Posted On: 22 Hours Ago
Replies: 28
Views: 8,081
0 No start after ultima ignition, thoughts?
Last Post: SHAKY DAVE
Posted On: 23 Hours Ago
Replies: 4
Views: 186
0 Show your favorite pic of your bike. just one
Last Post: 83XLX
Posted On: 1 Day Ago
Replies: 4,842
Views: 1,961,397
0 60’s XLCH front tyre
Last Post: 83XLX
Posted On: 1 Day Ago
Replies: 5
Views: 381
0 Tuning a keihin butterfly
Last Post: 83XLX
Posted On: 1 Day Ago
Replies: 4
Views: 257
0 '74 Front Brake Caliper leaking
Last Post: dtwaddell42
Posted On: 1 Day Ago
Replies: 9
Views: 208
0 1983 Roadster
Last Post: RicThompson
Posted On: 1 Day Ago
Replies: 78
Views: 5,426
More...
Members Birthdays
Mr. Lynn (75), dentat2 (51), OWNED13 (48), knolan.smith (43), Malicious44 (36)
Reply
 
Share Thread Tools Display Modes
  #81  
Old 9th December 2012
brucstoudt's Avatar
brucstoudt brucstoudt is offline
Senior Master Custom Bike Builder
 
Join Date: May 2010
Location: Pottstown PA.
Posts: 15,002
Sportster/Buell Model: xlch
Sportster/Buell Year: 1960
Sportster/Buell Model #2: 883 custom
Sportster/Buell Year #2: '03
Reputation: 1025691
brucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond repute
Default

they've been carving notches in them for,year's. old trick.some compression loss would be expected. but a,new piston,you wouldn't have any loss.
__________________
72 1000cc barrels and heads, s&s 41/2'' flywheels, sifton cams, s&s super B w/ zippers thunderjet w/yost powertube, andrews gears,and shafts, competition engineering kevlar wet or dry clutch, 72 oil pump, morris magneto w/auto advance and single fire module, cycle electric generator w/electronic regulator,73 cu.in.
Reply With Quote
  #82  
Old 9th December 2012
hugie03flhr hugie03flhr is offline
Chief Harley Engineer
 
Join Date: Jan 2010
Posts: 533
Sportster/Buell Model: Buell M2
Sportster/Buell Year: 2002
Reputation: 961
hugie03flhr will become famous soon enoughhugie03flhr will become famous soon enoughhugie03flhr will become famous soon enoughhugie03flhr will become famous soon enoughhugie03flhr will become famous soon enoughhugie03flhr will become famous soon enoughhugie03flhr will become famous soon enoughhugie03flhr will become famous soon enough
Default

Quote:
Originally Posted by brucstoudt View Post
just compession,would apply to a,flat topped piston. the wedge shape of the piston dome should have a,squish effect forcing the fuel/air mixture toward's the center of the dome,[flat area],like hugie stated.
If you can get the piston close enough .030 to the head? I wonder where the compression would be? Also how much cam timing overlap is in these ironheads? I would hate to see the carnage of the piston hitting the valve in theses engines!!! It would probably crack the jug right off...LOL
Reply With Quote
  #83  
Old 9th December 2012
hugie03flhr hugie03flhr is offline
Chief Harley Engineer
 
Join Date: Jan 2010
Posts: 533
Sportster/Buell Model: Buell M2
Sportster/Buell Year: 2002
Reputation: 961
hugie03flhr will become famous soon enoughhugie03flhr will become famous soon enoughhugie03flhr will become famous soon enoughhugie03flhr will become famous soon enoughhugie03flhr will become famous soon enoughhugie03flhr will become famous soon enoughhugie03flhr will become famous soon enoughhugie03flhr will become famous soon enough
Default

Quote:
Originally Posted by brucstoudt View Post
they've been carving notches in them for,year's. old trick.some compression loss would be expected. but a,new piston,you wouldn't have any loss.
Carving a notch in the piston sounds risky? Do you do it on cast or forged only?
Reply With Quote
  #84  
Old 9th December 2012
brucstoudt's Avatar
brucstoudt brucstoudt is offline
Senior Master Custom Bike Builder
 
Join Date: May 2010
Location: Pottstown PA.
Posts: 15,002
Sportster/Buell Model: xlch
Sportster/Buell Year: 1960
Sportster/Buell Model #2: 883 custom
Sportster/Buell Year #2: '03
Reputation: 1025691
brucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond repute
Default

i,haven't done it personally. there recently was a,piston pic that had it done. mrmom9r,said he sold the piston's,to someone in europe i,believe. he would know the answer.
Reply With Quote
  #85  
Old 9th December 2012
bobber58 bobber58 is offline
Custom Bike Builder
 
Join Date: Dec 2009
Location: WV
Posts: 2,204
Sportster/Buell Model: XLH bobber
Sportster/Buell Year: 1964
Sportster/Buell Model #2: XLH
Sportster/Buell Year #2: 1974
Other Motorcycle Model: 883 Iron
Other Motorcycle Year: 2010
Reputation: 22094
bobber58 is a name known to allbobber58 is a name known to allbobber58 is a name known to allbobber58 is a name known to allbobber58 is a name known to allbobber58 is a name known to allbobber58 is a name known to allbobber58 is a name known to allbobber58 is a name known to allbobber58 is a name known to allbobber58 is a name known to all
Default

You can't squish the charge towards the center of the piston because the dome is there.
Reply With Quote
  #86  
Old 10th December 2012
xlproject's Avatar
xlproject xlproject is offline
Biker
 
Join Date: Dec 2007
Posts: 83
Reputation: 95
xlproject is an unknown quantity at this point
Default head casting

here is a notched piston...

Reply With Quote
  #87  
Old 10th December 2012
CHOPTOP37 CHOPTOP37 is offline
Senior Chief Know It All 1st Class
 
Join Date: Jan 2010
Posts: 1,145
Sportster/Buell Model: XLC
Sportster/Buell Year: 1972
Reputation: 11979
CHOPTOP37 is a glorious beacon of lightCHOPTOP37 is a glorious beacon of lightCHOPTOP37 is a glorious beacon of lightCHOPTOP37 is a glorious beacon of lightCHOPTOP37 is a glorious beacon of lightCHOPTOP37 is a glorious beacon of lightCHOPTOP37 is a glorious beacon of lightCHOPTOP37 is a glorious beacon of lightCHOPTOP37 is a glorious beacon of lightCHOPTOP37 is a glorious beacon of lightCHOPTOP37 is a glorious beacon of light
Default

forged only... i wouldnt do a cast piston and most arent thick enough any way. who made those above?
Reply With Quote
  #88  
Old 21st September 2021
73HEAD 73HEAD is offline
XL FORUM TEAM MEMBER
 
Join Date: Nov 2018
Posts: 124
Sportster/Buell Model: XLH
Sportster/Buell Year: 1973
Reputation: 159168
73HEAD has a brilliant future73HEAD has a brilliant future73HEAD has a brilliant future73HEAD has a brilliant future73HEAD has a brilliant future73HEAD has a brilliant future73HEAD has a brilliant future73HEAD has a brilliant future73HEAD has a brilliant future73HEAD has a brilliant future73HEAD has a brilliant future
Thumbs down tincan ha ha

Quote:
Originally Posted by DR DICK View Post
precisely. reducing the volume of the head side of chamber and shoving a piston with less protrusion in it should allow a quicker and higher pressure build after the spark.
(sounds like fittin evo sportster heads on shorter custom barrels and using the shorter evo rods in order to keep motor height from growing too much).
as does
increasing the swept volume under the orig chamber.
plus you get more stuff to burn in the deal. its win/win with more inches.

reguarding the 'why dont i just do evo' statement'.
because your tincover mag fired chromosome wont be satified.
thats just silly talk.
Reply With Quote
  #89  
Old 21st September 2021
ryder rick's Avatar
ryder rick ryder rick is offline
Senior Master Custom Bike Builder
 
Join Date: Jun 2008
Location: Cornelius, OR
Posts: 9,927
Reputation: 1247225
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

Don't mess with the piston dome, dual plug it and smile.
__________________
Ryder Rick "I know right from wrong, but sometimes, wrong feels right"
Reply With Quote
  #90  
Old 22nd September 2021
Ferrous Head's Avatar
Ferrous Head Ferrous Head is offline
Blind Owl
 
Join Date: Jun 2009
Location: Sunshine Coast
Posts: 7,375
Sportster/Buell Model: XLB, XLCH, Sporton
Sportster/Buell Year: 1962
Sportster/Buell Model #2: XLCH
Sportster/Buell Year #2: 1966
Other Motorcycle Model: XLCH (Another one)
Other Motorcycle Year: 1966
Reputation: 2796108
Ferrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond repute
Default

I'm with Rick on that.

Piston to head height I use 0.040 as a minimum. 60 over the valves.
__________________
"I know only too well the evil that I propose. But my inclinations get the better of me."
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 03:48.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC