SE Heavy Breather question
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Tourer
Joined: May 2008
Posts: 330
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From: Columbus, OH
SE Heavy Breather question
ok all you heavy breathers out there, a couple of questions for you please.
I really, really like the aggressive look and am thinking about going to it.
I talked with the guys at my dealership who I trust. they do all my service and have done all my mods and have never steered me wrong. A couple of things they told me:
1. the SE heavy breather actually drops a couple of peak torque on some bikes due to a smaller surface area of the media, compared to the SE high flow AC I have on now. Nothing I would notice seat-of-the-pants, but would show up on a dyno. they mentioned it so that I would not be surprised if I don't see any TQ increase moving to the heavy breather.
2. Dynojet registers the SE high flow and heavy breather the same, so no recalibration of my current PCIII load would be required if I put the heavy breather on.
I'm not looking for any performance gains, I just don't want to feel a noticable drop in power by moving to it.
any comments from folks who have moved from a SE or other high flow AC to a heavy breather?
thanks.
I really, really like the aggressive look and am thinking about going to it.
I talked with the guys at my dealership who I trust. they do all my service and have done all my mods and have never steered me wrong. A couple of things they told me:
1. the SE heavy breather actually drops a couple of peak torque on some bikes due to a smaller surface area of the media, compared to the SE high flow AC I have on now. Nothing I would notice seat-of-the-pants, but would show up on a dyno. they mentioned it so that I would not be surprised if I don't see any TQ increase moving to the heavy breather.
2. Dynojet registers the SE high flow and heavy breather the same, so no recalibration of my current PCIII load would be required if I put the heavy breather on.
I'm not looking for any performance gains, I just don't want to feel a noticable drop in power by moving to it.
any comments from folks who have moved from a SE or other high flow AC to a heavy breather?
thanks.
Novice
Joined: Feb 2009
Posts: 22
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1. I jumped from the SE stage 2 to the heavy breather. No notice of power increase or decrease.
2. No recal is neccesary.
Oh, and you get the "air sucking" sound with the breather, when you crunch it........that's about it, besides the fact that it looks so much better than the stage 1 IMO. Get it, you won't be disappointed.
2. No recal is neccesary.
Oh, and you get the "air sucking" sound with the breather, when you crunch it........that's about it, besides the fact that it looks so much better than the stage 1 IMO. Get it, you won't be disappointed.
Last edited by MOBANN1; Jun 20, 2009 at 08:31 AM.
Outstanding HDF Member
Joined: Jul 2007
Posts: 2,139
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From: PA.
When I switched from reg stage 1 to Heavy breather on my sportster, it seemed quicker out of the hole.
On my softail, I have nothing to compare to as I went right with the heavy breather.
I have a hard time believing it sucks less air then the standard stage 1 A/C
On my softail, I have nothing to compare to as I went right with the heavy breather.
I have a hard time believing it sucks less air then the standard stage 1 A/C
Banned
Joined: Mar 2007
Posts: 3,706
Likes: 7
From: Woodstock, Ont , Can
Torque loss, nonsense. If the torque is lower with this breather more fuel needs to be added as it is flowing better. Done right it should show a torque increase over the stage1 breather.
Ron
Ron
Last edited by rbabos; Jun 20, 2009 at 09:27 AM.
R.I.P. BROTHER
Joined: Dec 2008
Posts: 3,076
Likes: 6
From: Colorado Springs
My SE HB looks cool but thats about it.
A reputable motor builder here in town who did my motor told me it was probably 5HP and several ft lbs lost by not using a better designed AC.
He went on to give me some analogy about sticking my head out of the car window at 75MPH Vs putting my face rigght where the widow comes down.
He told me to buy a Doughtery power pack or something along those lines.
I told him I didnt care.
When my bike almost hit the magical 100HP/115TQ mark I dint have to ask the builder....We lose about 10% HP up here in Colorado due to the thin air. You gotta build a pretty beefy motor to hit a buck up at this altitude....Crappy AC dosent help.
I knew where them ponies and Lbs was hiding....
Didnt care. Looks to fvcking sweet to swap out for some ugly crap in the quest for that final 5 HP!!!!
A reputable motor builder here in town who did my motor told me it was probably 5HP and several ft lbs lost by not using a better designed AC.
He went on to give me some analogy about sticking my head out of the car window at 75MPH Vs putting my face rigght where the widow comes down.
He told me to buy a Doughtery power pack or something along those lines.
I told him I didnt care.
When my bike almost hit the magical 100HP/115TQ mark I dint have to ask the builder....We lose about 10% HP up here in Colorado due to the thin air. You gotta build a pretty beefy motor to hit a buck up at this altitude....Crappy AC dosent help.
I knew where them ponies and Lbs was hiding....
Didnt care. Looks to fvcking sweet to swap out for some ugly crap in the quest for that final 5 HP!!!!
Last edited by Chazmanian; Jun 20, 2009 at 11:26 AM.
Advanced
Joined: Sep 2008
Posts: 54
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From: South Western Pennsylvania
He went on to give me some analogy about sticking my head out of the car window at 75MPH Vs putting my face rigght where the widow comes down.
The heavy breather pointing into the wind allows the air to flow through the pleats easier at higher speeds than the round or oval air cleaners that mount straight out, which, by the way, have 50% of the pleats in the draft at speed. Sitting on a dyno, they flow about the same since the bike is stationary.
Anyway, I went from a K&N RK3910 filter hit, which was about 1/2" taller than the stock filter for more surface area, to the heavy breather and I did notice a difference. The bike pulls harder longer with the heavy breather with no change in the FuelPak's settings. It is possible that the settings used were for a filter that flowed better than the K&N, but that's anyone's guess.
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R.I.P. BROTHER
Joined: Dec 2008
Posts: 3,076
Likes: 6
From: Colorado Springs
Although the dawg with face out window struck me as a kinda silly analogy.....
Just about evryone that builds the raging fast motors has told me to lose the SE Heavy if I want to make a few more dyno points.
I could care less about a minor loss of power compared to an ugly piece designed on a dyno without any regards for its looks.
I bought a Harley not to go fast on but for what I perceive as the artistic beauty of the iconic softail, fat bob tank, bobbed fender design.
I'm creepy enough to have spent a good month looking for the last of the narrow *** end Trains before they started looking like M109R's and Vee-Rawds!
Needless to say...The SE stays. Dont matter now anyways as my jockey shifter is almost bolted up (Taking a lil' break from the action) and I will be about as worthless as teats on a boar hawg in a stoplight to stoplight battle......
Or so I think?
Just about evryone that builds the raging fast motors has told me to lose the SE Heavy if I want to make a few more dyno points.
I could care less about a minor loss of power compared to an ugly piece designed on a dyno without any regards for its looks.
I bought a Harley not to go fast on but for what I perceive as the artistic beauty of the iconic softail, fat bob tank, bobbed fender design.
I'm creepy enough to have spent a good month looking for the last of the narrow *** end Trains before they started looking like M109R's and Vee-Rawds!
Needless to say...The SE stays. Dont matter now anyways as my jockey shifter is almost bolted up (Taking a lil' break from the action) and I will be about as worthless as teats on a boar hawg in a stoplight to stoplight battle......
Or so I think?
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Advanced
Joined: Sep 2008
Posts: 54
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From: South Western Pennsylvania
Same here, I bought the breather for appearance and not performance, just in my set up, it seemed to add some "seat of the pants" pull. I don't plan on going back. I get more compliments now than I did before I installed it, that's for sure. 
I had a CBR1000RR that I traded in on my Train. If I wanted to rip the majority of bikes in a race, I'd have kept it since it put out around 150 rear wheel ponies where they counted. I traded it because I was tired of speeding tickets, I'm getting to old for that ****, and I was ready for some class.
I had a CBR1000RR that I traded in on my Train. If I wanted to rip the majority of bikes in a race, I'd have kept it since it put out around 150 rear wheel ponies where they counted. I traded it because I was tired of speeding tickets, I'm getting to old for that ****, and I was ready for some class.
