What Can I Expect From SE Heavy Breather?
Outstanding HDF Member
Joined: Apr 2009
Posts: 2,523
Likes: 3
From: Illinois
In response to wolf 1340, here's my dyno-chart. I had Jamie at fuelmoto install the cams and dyno it for me, and I'm very happy with the numbers with my Heavy Breather and true dual system. These numbers are as good or better than most 103 builds that didn't have headwork done. I have no reservations about using the Heavy Breather.
Advanced
Joined: Oct 2008
Posts: 77
Likes: 0
From: Alberta, Canada
In response to wolf 1340, here's my dyno-chart. I had Jamie at fuelmoto install the cams and dyno it for me, and I'm very happy with the numbers with my Heavy Breather and true dual system. These numbers are as good or better than most 103 builds that didn't have headwork done. I have no reservations about using the Heavy Breather.
Tourer
Joined: Feb 2009
Posts: 251
Likes: 0
From: Dallas Texas
Heavy Breather
We sell a lot of them and as long as it is combined with pipes, proper map you will feel a differance, especially low to mid range.
When Iput the Force Winder on my 87 FXR and did a little carb adjusting I noticed a definit low and mid difference.
A note, A top Dyno tuner in the area told me that anytime he Dynos a forward facing intake he ha a very very stong fan blowing iinto it.
When Iput the Force Winder on my 87 FXR and did a little carb adjusting I noticed a definit low and mid difference.
A note, A top Dyno tuner in the area told me that anytime he Dynos a forward facing intake he ha a very very stong fan blowing iinto it.
Seasoned HDF Member
Joined: Feb 2008
Posts: 22,999
Likes: 11,439
Have one.
Bike will sound different when roll throttle on hard, if you old enough remeber how you Chevy sounded with air cleaner off just not as loud.
You will notice a slightly better..quick throttle responce.
Add some fuel and it gets better.
IMO of me the SE heavy breather was a good move
Bike will sound different when roll throttle on hard, if you old enough remeber how you Chevy sounded with air cleaner off just not as loud.
You will notice a slightly better..quick throttle responce.
Add some fuel and it gets better.
IMO of me the SE heavy breather was a good move
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
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
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
Stage III
Joined: Aug 2009
Posts: 3
Likes: 0
From: Connecticut
I have a Heavy Breather and SE Street Performance Slip-ons. Installed a PCV when I upgraded to the Heavy Breather. Can't tell yet if it's better or same. Not sure if I have the best map for the PCV - any suggestions?
Road Master
Joined: Feb 2010
Posts: 791
Likes: 1
From: The Real World
Heavy Breather?- sounds like one but the noise dosen't result in more power - however, it's just part of the process of improving things. Speaking of which, the only way to get decent power (with a 96) is to port the heads, fit bigger inlet valves and stronger low mass springs, increase the comp ratio and select a cam to suit (for fast road work, high speed cruising, strong acceleration in the lower rev range etc) forget the SE EM device and fit something like a Power Commander. Get even more power and torque with a capacity increase, tuned length 2 into one exhaust system. Beyond this and you're into serious cash....
Thread
Thread Starter
Forum
Replies
Last Post
