Stock 2008 FLHX and SE Heavy Breather

[tomryan]

I have a stock 08 FLHX. If I add just the SE Heavy Breather, do I need to change anything else? From what I can gather, if I also change the pipes, I will then need a remap, but it would seem that just the AC change out will not require that. Is this correct? Thank you. Tom

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[davewear]

Originally Posted by tomryan

I have a stock 08 FLHX. If I add just the SE Heavy Breather, do I need to change anything else?

From what I can gather, if I also change the pipes, I will then need a remap, but it would seem that just the AC change out will not require that.

Is this correct?

Thank you.

Tom

i would think just pipes would not require a remap but the heavy breather alone would....

[rochkes]

There are many opinions on this. This is just my opinion. Many others will disagree, but.......

There are two factors that mainly control the flow of air through your motor. Air intake and exhaust.

You have added a higher flow air intake, I am not sure why, and still have stock exhaust. No more air will flow into your motor since no more air is flowing out. Your motor can only suck in as much air as what is going out, so you haven't changed a thing.

The amount of air coming into your motor is exactly the same as it was before you changed the breather because it is limited by your exhaust.

No need to do anything else, but nothing gained by what you have done so far either.

Dennis

[tomryan]

I haven't done anything yet, I'm trying to decide how I want to proceed..

I think, it will be SE heavy breather first and then for a "winter" project, rinehart true duals and a remap.

I just want to make sure I do it "right" (or at least ok) and I had a hard time getting a concrete answer reading through the threads

oh well, it still seems easier than figuring out which oil to use!

though I do like reading those threads..

[backdoc_rider]

you might be better off just buying the SE breather and waiting to install it when you have your pipes and can remap.

[imrotton2]

ive read that the heavy breathers dont flow as much air as they lead you to believe... they do look awsome tho... i just wonder how well one would do in a heavy rain or if you would hafta find shelter and pull over

[Primo]

Originally Posted by backdoc_rider

you might be better off just buying the SE breather and waiting to install it when you have your pipes and can remap.

+1. No real benefit with stock exhaust.

[Primo]

Originally Posted by imrotton2

ive read that the heavy breathers dont flow as much air as they lead you to believe... they do look awsome tho... i just wonder how well one would do in a heavy rain or if you would hafta find shelter and pull over

Mine did make a decent difference according to the dyno readout.

They come with a rain sock but I got stuck in a freaky downpour several months ago with my heavy breather uncovered and suffered no ill effects.

[Bertk]

Originally Posted by tomryan

I haven't done anything yet, I'm trying to decide how I want to proceed..

I think, it will be SE heavy breather first and then for a "winter" project, rinehart true duals and a remap.

I just want to make sure I do it "right" (or at least ok) and I had a hard time getting a concrete answer reading through the threads

oh well, it still seems easier than figuring out which oil to use!

though I do like reading those threads..

The best or right way to do this is all at the same time. This way you will not risk making a lean running engine run leaner and hotter. When changing the a/c and exhaust a fuel management system is needed to do it right. Don't let any dealer sell you a map, because all of there canned maps are designed for SE parts.

Here are two options:
1. Choose the a/c, pipes, and a fuel management system, then find a tuner to dyno tune the bike. Depending where you live, it may be very difficult to find a good tuner.

2. Purchase a package deal that included the a/c, pipes, fuel management system as a package with a map to go along with it. Fuel Moto (a HD Forum sponsor here) is one company that provides this service, and comes highly recommended. Contact Jamie at Fuel Moto, I am sure he will be glad to help you out.

[rochkes]

All the dyno sheets I have ever saw that compared the SE high flow breather to the SE heavey breather actually showed that when comparing apples to apples, the heavy breather was behind the high flow breather in dyno results. It is more of a looks thing than a performance thing.

Dennis