Harley Davidson Forums

Exhaust System Topics New and old exhaust system discussions. Fitment issues to sound bites and suggestions. Post them here.
Sponsored by:
Sponsored by: Jekill and Hyde

Opinions wanted on 103 build

Thread Tools
 
Search this Thread
 
  #11  
Old 01-25-2009, 01:06 PM
FXSTDSE2's Avatar
FXSTDSE2
FXSTDSE2 is offline
Outstanding HDF Member
Join Date: May 2008
Location: South Jersey
Posts: 2,009
Likes: 0
Received 0 Likes on 0 Posts
Default
Good luck with that! The best I have pulled off with my 9:1 ultra is 104 lbtq with a woods 6H w/4* adv. gear. Thats with a CVO 103 head with 1.94 intake valve. The MVA heads have huge ports and valves so I couldn't imagine the combination pulling any good low end torque. But it will fly once you get it wound up!! To pull off 115 lbtq you are going to need at least 9.8:1 compression and a street ported head and the right cam.
 
Reply Like
  #12  
Old 01-25-2009, 01:39 PM
chad peterson's Avatar
chad peterson
chad peterson is offline
Road Master
Join Date: Jan 2007
Location:
Posts: 1,221
Likes: 0
Received 2 Likes on 2 Posts
Default
Not gonna happen! Plenty of advice & info on this already, gotta wait! All I gotta say!
 
Reply Like
  #13  
Old 01-25-2009, 03:22 PM
Rebel78's Avatar
Rebel78
Rebel78 is offline
Road Captain
Join Date: Jul 2007
Location: Dubai
Posts: 508
Likes: 0
Received 0 Likes on 0 Posts
Default
If 9:1 ratio won't get you the numbers you want, then go for a higher compression piston, but dont exceed 10:1 if you wanna maintain reliability.
 
Reply Like
  #14  
Old 01-25-2009, 04:58 PM
SEDELUXE's Avatar
SEDELUXE
SEDELUXE is offline
Road Warrior
Join Date: Dec 2007
Posts: 1,270
Likes: 0
Received 0 Likes on 0 Posts
Default
Originally Posted by Sandmankc
I guess I should have asked this a little differently. I fully understand the difference between SE parts and having my heads reworked. What I am looking to know is if anyone has had success building a 103 with good heads and cams and got around 105 HP and 115 ft-lbs of torque at 9:1 compression. It makes no difference on the SE vs HQ parts my dealer wants to put in 9:1 pistons and says they can get the performance I want. I haven't read anyone getting these results at 9:1 compression.
9.8-10 - 0 copression
yes it can be done
baisley heads and tw6 cam.
 
Reply Like
  #15  
Old 01-25-2009, 06:10 PM
beaureed445's Avatar
beaureed445
beaureed445 is offline
Outstanding HDF Member
Join Date: Oct 2007
Location: Edmond, Ok
Posts: 2,018
Likes: 0
Received 6 Likes on 6 Posts
Default
Originally Posted by Rebel78
If 9:1 ratio won't get you the numbers you want, then go for a higher compression piston, but dont exceed 10:1 if you wanna maintain reliability.
I totally disagree with the statement above. There are MANY people on this forum running more than 10:1 compression, AND have reliability. Don't get me wrong, Rebel78, we don't live/ride in 130* heat (like you), but you can definitely run over 10:1 and have reliability. Just my .02
 
Reply Like
  #16  
Old 01-25-2009, 06:56 PM
chad peterson's Avatar
chad peterson
chad peterson is offline
Road Master
Join Date: Jan 2007
Location:
Posts: 1,221
Likes: 0
Received 2 Likes on 2 Posts
Default
Originally Posted by beaureed445
I totally disagree with the statement above. There are MANY people on this forum running more than 10:1 compression, AND have reliability. Don't get me wrong, Rebel78, we don't live/ride in 130* heat (like you), but you can definitely run over 10:1 and have reliability. Just my .02
Agreed completely!
 
Reply Like
  #17  
Old 01-25-2009, 08:37 PM
qtrracer's Avatar
qtrracer
qtrracer is offline
Ultimate HDF Member
Join Date: Jan 2008
Location: SoCal
Posts: 6,532
Received 131 Likes on 104 Posts
Default
Running 10.5 pistons with MVA heads ,58mm TB , have plenty of low end torque . Don't believe all the naysayers that say big valves kill torque ,big TB's kill torque , they don't if set up with all the parts thought out ahead of time not hodgepodged together.
 
Reply Like
  #18  
Old 01-25-2009, 09:24 PM
SEDELUXE's Avatar
SEDELUXE
SEDELUXE is offline
Road Warrior
Join Date: Dec 2007
Posts: 1,270
Likes: 0
Received 0 Likes on 0 Posts
Default
i ride the snot out of my build in my sig... i do not worry about reliabilty at all..if the parts compliment each other , installed correctly and the TUNE is correct reliabity should not be an issue
 
Reply Like
  #19  
Old 01-26-2009, 12:01 AM
hpfatboy's Avatar
hpfatboy
hpfatboy is offline
Banned
Join Date: Oct 2007
Posts: 11,436
Received 10 Likes on 9 Posts
Default
Originally Posted by chad peterson
Agreed completely!
2nd THAT, Im at 10-2-1 comp. no issues at all. Runs like a swiss clock.
 
Last edited by hpfatboy; 01-26-2009 at 03:43 AM.
Reply Like
  #20  
Old 01-26-2009, 02:00 PM
Kingofcubes's Avatar
Kingofcubes
Kingofcubes is offline
Road Master
Join Date: May 2007
Location: Mitchellville, Ia.
Posts: 850
Likes: 0
Received 5 Likes on 5 Posts
Default compression
I run 10.8 to 11.2 to 1 all the time on pump gas w/o pinging. Pinging is a result of heat and pressure, take the heat away with VE and you can up the pressure. Ask Tim Brindley in Arizona, he's running a 131" Hypermotor at 11.6 to 1 on 87 octane and has 156 horse. I would be sceptical of those numbers at 9:1 except for one cylinder head out there at that cubic inch.
 
Reply Like
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
top end build
Tripleshot
Touring Models
6
01-24-2014 01:07 AM
Here's my plan - 120 build
FLYER
Touring Models
8
12-21-2013 03:51 PM
SE 110 or 103 heads on 96b cylinders?
TRUSTNOBODY
Softail Models
4
07-09-2012 08:05 PM
SE ACR heads or 103+ heads which set should I use?
Base401
Exhaust System Topics
7
12-04-2008 11:10 PM
SE HTCC Ported heads opinions?
Hammer02
Exhaust System Topics
6
02-26-2007 11:21 PM
Tags
Back to Subforum
Exhaust System Topics
View Next Unread
Brake line for z bars




Advanced Search
Quick Reply: Opinions wanted on 103 build


Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 07:34 AM.