The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE & BUELL MOTORCYCLE FORUM - GENERAL DISCUSSION > DYNO Charts and Result
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

DYNO Charts and Result Post your dyno charts and results here.

Active Threads
0 ***DK Custom Products Stealth LED Front Turn Signals /White Running Lights PNP***
Last Post: DK Custom
Posted On: 6 Minutes Ago
Replies: 6
Views: 2,063
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Stairman
Posted On: 6 Minutes Ago
Replies: 42,507
Views: 6,590,155
0 ***Stealth LED Run-Brake-Turn Lights- True Plug-n-Play Sportster***
Last Post: DK Custom
Posted On: 7 Minutes Ago
Replies: 8
Views: 1,504
0 Do you use premium gas in your Sportster?
Last Post: Bone
Posted On: 12 Minutes Ago
Replies: 1,719
Views: 329,535
0 My new buckhorn bars
Last Post: Stairman
Posted On: 14 Minutes Ago
Replies: 1
Views: 3
0 Hello from Tennessee
Last Post: Stairman
Posted On: 18 Minutes Ago
Replies: 2
Views: 18
0 Is this 1200R worth $4500?
Last Post: rich56
Posted On: 21 Minutes Ago
Replies: 31
Views: 711
0 A Weekend at the Races
Last Post: Stairman
Posted On: 29 Minutes Ago
Replies: 28
Views: 1,078
0 Roads I'd like to ride.
Last Post: Stairman
Posted On: 35 Minutes Ago
Replies: 984
Views: 60,528
0 DK Coil and Coil/Key Relocation Customer Review and Pics
Last Post: DK Custom
Posted On: 44 Minutes Ago
Replies: 75
Views: 17,886
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 1 Hour Ago
Replies: 9,586
Views: 798,984
0 Hot Chicks on Hot Bikes
Last Post: Stairman
Posted On: 2 Hours Ago
Replies: 9,468
Views: 1,495,371
4 Grinding noise when revving up
Last Post: Blue Scoot
Posted On: 2 Hours Ago
Replies: 1
Views: 65
0 Mystery oil splatter in exhaust
Last Post: T_worth
Posted On: 2 Hours Ago
Replies: 7
Views: 217
0 Winter Storm Warning
Last Post: smilinbrad
Posted On: 2 Hours Ago
Replies: 6
Views: 145
0 joyride memories xlx ironhead
Last Post: Folkie
Posted On: 3 Hours Ago
Replies: 5
Views: 85
0 What kind of car lives with your HD?
Last Post: moparnut72
Posted On: 3 Hours Ago
Replies: 572
Views: 72,848
0 A Day in the Life...
Last Post: DK Custom
Posted On: 3 Hours Ago
Replies: 608
Views: 62,008
0 XL883L 2006 coughing and backfiring
Last Post: Toejam503
Posted On: 3 Hours Ago
Replies: 4
Views: 101
0 Mustang's new seat? Anyone tried it?
Last Post: jharback
Posted On: 3 Hours Ago
Replies: 10
Views: 236
0 primary chain adjuster spring load..?
Last Post: jamesbreeze
Posted On: 3 Hours Ago
Replies: 1
Views: 53
0 timing troubles!
Last Post: JSH
Posted On: 3 Hours Ago
Replies: 12
Views: 271
0 Big change for me!
Last Post: oupa
Posted On: 4 Hours Ago
Replies: 4
Views: 305
0 You asked for it! "The Tess' Coffee Thread"
Last Post: Crusty
Posted On: 4 Hours Ago
Replies: 10,475
Views: 767,451
0 Bushing alignment
Last Post: Hippysmack
Posted On: 5 Hours Ago
Replies: 48
Views: 1,546
0 Celebrating Sportsterpedia's Third Anniversary
Last Post: Hippysmack
Posted On: 5 Hours Ago
Replies: 12
Views: 598
0 Vote for Most Sought After Sportster
Last Post: longride
Posted On: 5 Hours Ago
Replies: 324
Views: 66,106
0 Help needed slip ons vs full system for new 48
Last Post: John Harper
Posted On: 5 Hours Ago
Replies: 6
Views: 181
0 WTB: Factory Ironhead 2-1 Head Pipes
Last Post: wrkdWS6
Posted On: 6 Hours Ago
Replies: 0
Views: 36
0 Hot Rods, Rat Rods, and Customs.
Last Post: Stairman
Posted On: 6 Hours Ago
Replies: 2,954
Views: 304,118
More...
Members Birthdays
steve yorke (61), edman (53), Hudsonator (51), kozman32 (51), R3DN3X (49), gmcsid (48), mitch (43), Gotenfan (29)
Sponsored Links
Reply
 
Share Thread Tools Display Modes
  #81  
Old 18th November 2017
aswracing's Avatar
aswracing aswracing is offline
A Million Facts & Figures
 
Join Date: Jan 2005
Location: Famous Potatoes
Posts: 9,922
Sportster/Buell Model: XL883
Sportster/Buell Year: 2007
Sportster/Buell Model #2: Buell Cyclone
Sportster/Buell Year #2: 1999
Reputation: 2138856
aswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond repute
Default



2013 XL1200 Sportster owned by a valued HAMMER PERFORMANCE customer, equipped as follows.

Comments: This is effectively our 110+hp 883 conversion package as applied to a 1200, with one big difference: it still has the stock, unmodified throttle body. In our testing, a simple low-cost porting service on the stock throttle body is good for about 5 horsepower at this level. We're hoping to get our hands on it and find him some more power.
__________________
Click Here to Contact Me

Reply With Quote
Sponsored Links
  #82  
Old 6th May 2018
aswracing's Avatar
aswracing aswracing is offline
A Million Facts & Figures
 
Join Date: Jan 2005
Location: Famous Potatoes
Posts: 9,922
Sportster/Buell Model: XL883
Sportster/Buell Year: 2007
Sportster/Buell Model #2: Buell Cyclone
Sportster/Buell Year #2: 1999
Reputation: 2138856
aswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond repute
Default



1250 and 1275 conversions, done on the same bike with the same set of stock 883 heads, same Patriot exhaust, Powervision tuner, Dynojet dyno, etc.



Same 1250 & 1275 results, as compared to the same bike when it was a stock 883.
Reply With Quote
  #83  
Old 6th May 2018
Folkie's Avatar
Folkie Folkie is online now
Brass Nut
 
Join Date: Feb 2005
Location: Western Weald
Posts: 44,848
Sportster/Buell Model: XL1200CB
Sportster/Buell Year: 2015
Other Motorcycle Model: CRF250L
Other Motorcycle Year: 2017
Reputation: 10451907
Folkie has a reputation beyond reputeFolkie has a reputation beyond reputeFolkie has a reputation beyond reputeFolkie has a reputation beyond reputeFolkie has a reputation beyond reputeFolkie has a reputation beyond reputeFolkie has a reputation beyond reputeFolkie has a reputation beyond reputeFolkie has a reputation beyond reputeFolkie has a reputation beyond reputeFolkie has a reputation beyond repute
Default

Just a reminder: posts with dyno charts only; no comments or chat here please. Other posts will be deleted. Comments and questions about the dyno charts posted here can be posted in a separate thread in the Dyno Charts And Results section. Thanks.
__________________
Folkie
Super Moderator
South East England Riders



There is nothing at the end of any road better than may be found beside it. Edward Thomas (1878 - 1917)
Reply With Quote
  #84  
Old 10th December 2018
aswracing's Avatar
aswracing aswracing is offline
A Million Facts & Figures
 
Join Date: Jan 2005
Location: Famous Potatoes
Posts: 9,922
Sportster/Buell Model: XL883
Sportster/Buell Year: 2007
Sportster/Buell Model #2: Buell Cyclone
Sportster/Buell Year #2: 1999
Reputation: 2138856
aswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond reputeaswracing has a reputation beyond repute
Default



2007 XL883 equipped as follows:
  • Stock EFI 1200 heads
  • Stock original "W" cams
  • Air Hammer air cleaner (SLEDGE model)
  • Patriot exhaust
  • Dynojet Powervision tuner
  • tested on the same Dynojet 188 dynamometer

Blue: flat top 1275 kit
Red: flat top 1250 kit
Green: stock 1200 cylinders and flat top pistons

Comments: Through the bottom and middle, making the motor bigger adds a lot of torque and power. But as you go higher in rpm, the lines converge, and the big bore kit doesn't bring nearly as much to the party. Also notice how the bigger the motor, the lower the rpm at which the horsepower peaks.

That's typical of a motor that's had it's displacement increased without a corresponding increase in breathing. Making the motor bigger causes the air demand to go up. At low to mid rpm ranges, there's plenty of time to fill the cylinder, so the displacement increase brings a bunch more torque and thus power. But at high rpm, things are happening faster and faster, there's less time to fill the cylinder, and the motor becomes breathing constrained instead of displacement constrained.

So to get a big top side number with a big bore kit, you really need to do breathing mods as well (cams and/or head work).

However, for many people, the bottom to the mid range is more important anyway. So a lot of these kits get installed without cams and/or head work and the owner is perfectly happy with the results.
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 22:10.


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