Go Back   Harley Davidson Forums > Harley Davidson Tech & Mechanical Forum > Exhaust System Topics
Sign in using an external account
Register Forgot Password?
Search

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

Welcome to HDForums.com!

Reply
 
 
 
P
 
Thread Tools Search this Thread
  #1  
Old 03-02-2011, 05:24 PM
cdn-rider cdn-rider is offline
Hang Around
Join Date: Nov 2008
Location: alberta, canada
Posts: 3
Default SE Heads

Does anyone know what the main difference is between the SE MVA heads and the SE 110+? Besides the MVAs being CNC ported. Springs and valve sizes seem equal. How much of a difference in performance could you expect?
Reply With Quote
  #2  
Old 03-02-2011, 05:57 PM
qtrracer's Avatar
qtrracer qtrracer is offline
Elite HDF Member
Join Date: Jan 2008
Location: SoCal
Posts: 4,136
Default

The MVA's flow substantially more than the 110+'s , I have been told that they will outflow the 295 cfm that SE uses in their flow charts, that they will flow 300-305 out of the box. Thats roughly 50 cfm more than the 110+'s that flow at 245. That's 20% more. Used in a proper engine combination these (MVA) heads work very well.
__________________
You can't trap a fire phoenix, I mean that'd be crazy..........right?
Reply With Quote
  #3  
Old 03-03-2011, 11:03 AM
djl's Avatar
djl djl is offline
Elite HDF Member
Join Date: Jun 2006
Location: san antonio
Posts: 4,994
Default

As gtrracer points out, flow is the difference. The MoCo claims ithe increaed flow is the result of the CNC porting and the "right size" 98cc port volume.

Personally, I don't see the relativity of the flow numbers as there is no baseline to compare the SE claimed flow against the flow numbers of aftermarket heads. There are so many variables that can affect flow data, like the flow bench itself, the intake fixture used, etc. that unless heads are all flowed on the same bench, same intake fixture, etc., it is impossible to compare the SE claimed flow numbers with flow numbers of say, a ported OEM head.

The last sentence in gtrracer's post is most important "Used in a proper engine combination these (MVA) heads work very well". it is hard for me to believe that either the MVA heads at $1400 pr the 110" heads at $1150 are worth the investment when there are aftermarket options to port your OEM heads for half that price that more than meet most requirements for a street build. But that's JMHO.
Reply With Quote
  #4  
Old 03-03-2011, 02:14 PM
cdn-rider cdn-rider is offline
Hang Around
Join Date: Nov 2008
Location: alberta, canada
Posts: 3
Default

Thanks for the responses. I’ve been looking at the SE 103 stage IV kit. I see some postings on it. Most guys said to up grade to the MVA heads. The cost of porting heads in Canada is quite expensive. The overall cost of this kit seems reasonable.
Reply With Quote
  #5  
Old 03-03-2011, 03:04 PM
djl's Avatar
djl djl is offline
Elite HDF Member
Join Date: Jun 2006
Location: san antonio
Posts: 4,994
Default

Quote:
Originally Posted by cdn-rider View Post
Thanks for the responses. Iíve been looking at the SE 103 stage IV kit. I see some postings on it. Most guys said to up grade to the MVA heads. The cost of porting heads in Canada is quite expensive. The overall cost of this kit seems reasonable.
Understood. You might want to consider a cam change as well; take a look at the 259E. A little earlier intake close, not quite as much lift and a little shorter duration. JMHO but might be a better and more "rideable" profile. Not speaking from experience, just comparing the 259E profile with the 260 profile; take a look and see what you think.

Use a .030" Cometic MLS head gasket when going back together.
Reply With Quote
  #6  
Old 03-03-2011, 04:44 PM
qtrracer's Avatar
qtrracer qtrracer is offline
Elite HDF Member
Join Date: Jan 2008
Location: SoCal
Posts: 4,136
Default

Depending on the bike in question to be fitted with the "kit" the 259e's would be a great choice. I used the 251's in an 103" 08 FLHX when SE had them made for the 07 and later bikes, before they started making the "e" series, these are nearly identical to the 259e profile with a 1 degree earlier intake valve close. If you can't get the dealer to swap, let me know.
__________________
You can't trap a fire phoenix, I mean that'd be crazy..........right?
Reply With Quote
  #7  
Old 03-04-2011, 01:34 PM
cdn-rider cdn-rider is offline
Hang Around
Join Date: Nov 2008
Location: alberta, canada
Posts: 3
Default

Great info. I'd be installing it in a 2009 FLHX; I do some 2 up riding. The cam swap makes good sense, I would like it to come on a bit sooner. I'll see what the dealership will do for me.
Reply With Quote
  #8  
Old 03-04-2011, 03:48 PM
Hillsidecyclecom's Avatar
Hillsidecyclecom Hillsidecyclecom is offline
Outstanding HDF Member
Join Date: Dec 2007
Posts: 2,335
Default

Quote:
Originally Posted by cdn-rider View Post
Does anyone know what the main difference is between the SE MVA heads and the SE 110+? Besides the MVAs being CNC ported. Springs and valve sizes seem equal. How much of a difference in performance could you expect?
A flea-bay take-off 110" casting re-worked here,(read, inexpensive casting cost) will roll off at/near 310.
That support a rockin' 124"er.
Scott
__________________
PALMER BROS.
HILLLSIDE MOTORCYCLE & MACHINE
5225 S. Main St.
Munnsville, N.Y. 13409
phone/fax 315-495-6650
www.hillsidecycle.com
"30 years of building power."
Reply With Quote
  #9  
Old 03-04-2011, 07:56 PM
rob71458's Avatar
rob71458 rob71458 is offline
Prospect
Join Date: Apr 2007
Location: Boston area
Posts: 223
Talking

Ain't that the truth!
__________________
2007 SERK,124,S&S pistons & cyls., Hobans 4 5/8 Jims crank, Ported SE110 heads, S&S 640 gear drive, S&S rollers, SB push rods, 11.5, 190 ccp, HPI 58/62, 5.7 Marren injectors, Bandit clutch, D@D Borzilla, IDS, Baker DD7, TWR stabilizer, K&P filter, Jagg ten row oil cooler, Big Sky oil cooler fans, Lenale fan. 140-ish.
Reply With Quote
  #10  
Old 03-05-2011, 05:13 PM
Hillsidecycle.com's Avatar
Hillsidecycle.com Hillsidecycle.com is offline
Sponsor
Join Date: Oct 2009
Posts: 5,489
Default

Rob,
I know of a bike in the "Boston area" that is living proof of that!! hehe
Scott
__________________
PALMER BROS.
HILLSIDE MOTORCYCLE & MACHINE, INC.
5225 S. MAIN ST., MUNNSVILLE, N.Y. 13409
315-495-6650
www.hillsidecycle.com
Palmer Bros. Performance Products
Complete Machine Shop
Case Boring, Cylinder boring
Complete Cylinder Head Shop
Super-Flow Flow Bench
Crank Rebuilding
Dyno Tuning
Our exclusive Predator Series Engines
From Flatheads, to 2014 models.
"OVER 30 YEARS OF BUILDING HARLEY POWER"
Facebook/Hillside Motorcycle & Machine
Reply With Quote
Old 03-05-2011, 05:13 PM
 
 
 
P
Reply

Tags
103, 110, 124, 259e, chart, cnc, cylinder, davidson, flow, harley, head, heads, mva, ported, se, stage


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off
Forum Jump

Advertising
Featured Sponsors
Vendor Directory
Sponsors
All times are GMT -5. The time now is 03:30 AM.

© Internet Brands, Inc.

Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.5.2

Admin, Emails & Contact Details