This Guy's Pipes Are Still Too Quiet

Wednesday, May 31, 2006

I received the following e-mail today from a reader...

HARLEY DAVIDSON INSTALLED SCREAMING EAGLE SLIP ON. THE TONE IS TOO MILD. TOO QUITE. I CAN'T EVEN WAKE MY NEIGHBORS...

MY QUESTION. CAN I REMOVE THE BAFFLES THEN USE THE SCREAMING EAGLE "EFI
RACE TUNER KIT" TO RECONFIGURE MY COMPUTER INJECTION SYSTEM... WILL I RISK HURTING THE BIKE?

A buddy of mine once told me that if you replace the head pipes with an aftermarket set, it'll be a lot louder.

He won't hurt the bike by removing the baffles, as long as he remaps the EFI.

Anyone else care to comment?

Posted by Steve Johnson

Post a Comment

Anonymous5/31/2006 08:01:00 PM
Removing the baffles will change the backpressure. Whether it will be enough to hurt the engine is something you need a meter to measure.
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Big Ben5/31/2006 09:58:00 PM
As long as he gets the EFI correctly remapped (or rejet if the bike is carbed), it won't hurt the engine, but it will seriously hurt performance. I definitely wouldn't recommend it unless noise is all he cares about.

There are several aftermarket exhausts, both slip-on and full, that will be louder than SE without hurting performance. I would say go with one of those or risk looking like a noob poser.
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Big Ben5/31/2006 10:04:00 PM
To be more specific, removing the baffles can cause issues with both reversion and backpressure, which will give you a major drop in the powerband right at the rpms you use most.

You only need to worry about engine damage if the fuel mixture is too lean , but it will be unless you remap or rejet.
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Anonymous6/01/2006 12:24:00 PM
or risk looking like a noob poser.

Too late....
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Anonymous6/07/2006 05:29:00 AM
THE LOSS OF BACK PRESSURE WILL SEVERLY HURT PERFOMANCE AS WELL AS SOUND.THERE IS ANOTHER OPTION TRY A NEW BAFFLE BY BIG CITY THUNDER . THESE BAFFLES SHOULD GIVE YOU THE SOUND YOUR LOOKIN FOR. CHECK THEM OUT @ BIGCITYTHUNDER.COM
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Anonymous1/29/2007 05:04:00 PM
Remove the baffels with a re-map or a suitable EFI tuning system like te BMI system...check your plugs they will tell the story
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stockHDpipesRBest12/12/2009 08:32:00 PM
Glad I'm not that jackasses neighbor! New loud pipe legislation is being discussed every single day. Way to go, Einstein!
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