Which headers are they?
Thread Starter
|
Tourer
Joined: Jul 2019
Posts: 408
Likes: 103
From: Chesterfield, UK
Which headers are they?
A while ago someone told me about some headers that looked like V&H dresser duals but had a hidden crossover which should help maintain back pressure and therefore low end torque but I can’t remember what they are.
Does anyone know what they are and whether they’re available for the M8 tourers please?
Does anyone know what they are and whether they’re available for the M8 tourers please?
Grand HDF Member
Joined: Jul 2016
Posts: 4,384
Likes: 8,742
From: Texas
X over helps eliminate back pressure via scavenging - best application is for a big motor build (on both of mine)
By itself you do lose low end torque - however by using the correct baffling can regain it for a smooth dyno curve (again, big motors builds benefit the most)
Ghost
Thread Starter
|
Tourer
Joined: Jul 2019
Posts: 408
Likes: 103
From: Chesterfield, UK
This is incorrect
X over helps eliminate back pressure via scavenging - best application is for a big motor build (on both of mine)
By itself you do lose low end torque - however by using the correct baffling can regain it for a smooth dyno curve (again, big motors builds benefit the most)
For M8s - Fullsac makes a de-catted, dual, header pipe with a X over.., likely others exist
Ghost
X over helps eliminate back pressure via scavenging - best application is for a big motor build (on both of mine)
By itself you do lose low end torque - however by using the correct baffling can regain it for a smooth dyno curve (again, big motors builds benefit the most)
For M8s - Fullsac makes a de-catted, dual, header pipe with a X over.., likely others exist
Ghost
Trending Topics
Grand HDF Member
Joined: Jul 2016
Posts: 4,384
Likes: 8,742
From: Texas
Back pressure (for torque) would have more to do with pipe diameter - until you incorporated the slip on baffle - then it a balancing act between the two
Ghost
Random explanation - many available on innerweb
https://low-offset.com/guides/exhaust-scavenging/
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
Jason Momoa Is Turning Classic Harleys Into PHEVs
Verdad Gallardo
Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom
Verdad Gallardo
6 Weirdest Harley-Davidsons Ever Sold to the Public
Verdad Gallardo
7 Times Harley-Davidson Chucked Tradition Out the Window
Verdad Gallardo
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Thread Starter
|
Tourer
Joined: Jul 2019
Posts: 408
Likes: 103
From: Chesterfield, UK
Better scavenging (removal) of the exhaust
Back pressure (for torque) would have more to do with pipe diameter - until you incorporated the slip on baffle - then it a balancing act between the two
Ghost
Random explanation - many available on innerweb
https://low-offset.com/guides/exhaust-scavenging/
Back pressure (for torque) would have more to do with pipe diameter - until you incorporated the slip on baffle - then it a balancing act between the two
Ghost
Random explanation - many available on innerweb
https://low-offset.com/guides/exhaust-scavenging/
Thread
Thread Starter
Forum
Replies
Last Post