Changing/removing baffles with mm efi

Reply Subscribe

Thread Tools

Search this Thread

Jun 30, 2017 | 11:46 PM

cowboyshovel79

Thread Starter

Advanced

Joined: Jan 2013

Posts: 86

Likes: 1

From: phoenix az

Changing/removing baffles with mm efi

Got my new to me rkc home and it is stupid quiet, I don't like that,. It has Vance and Hines slip ons they look to have removable baffles end caps atleast.

I'm not wanting to start a political debate about loud pipes please.

My question is if I remove or modify the baffles how far off will it throw the efi.
It is a stage II screaming eagle setup.

Any ideas on baffles that keep decent power but sound honestly I'd be fine with straights if it wouldnt kill power and hurt the motor

Jul 1, 2017 | 07:03 AM

Crashone

Stellar HDF Member

Joined: Jul 2014

Posts: 2,721

Likes: 243

From: NC

You need to have some back pressure for the EFI system to work right. That being said I just put a set of dual oval V&H on mine that sound great. I am running a Doebeck tuner that I can dial the system in with. The '96 did not have a tunable ECM.
On my mufflers I can see straight through them and see the baffle ridges along the sides.

Jul 1, 2017 | 01:22 PM

cowboyshovel79

Thread Starter

Advanced

Joined: Jan 2013

Posts: 86

Likes: 1

From: phoenix az

I very much appreciate the reply but I'm kinda on a budget was mor thinking shortening/modifying the ones I have

Jul 1, 2017 | 05:18 PM

Crashone

Stellar HDF Member

Joined: Jul 2014

Posts: 2,721

Likes: 243

From: NC

Can you hold one up and see daylight through it? No? Remove obstruction, repeat for the other side, mount 'em up and give it a go.

Jul 1, 2017 | 07:01 PM

NORTY FLATZ

Seasoned HDF Member

Joined: Jan 2015

Posts: 16,013

Likes: 7,137

From: Sandy Eggo's North County

Quote:

Originally Posted by cowboyshovel79

My question is if I remove or modify the baffles how far off will it throw the efi.
It is a stage II screaming eagle setup.

Any air flow change may require tuning changes to get the utmost out of your engine.

Quote:

Any ideas on baffles that keep decent power but sound honestly I'd be fine with straights if it wouldnt kill power and hurt the motor

Honstly? The best exhaust system will be a "2 into 1" with stepped primaries that are as long as possible, dumping into a HUGE end can. Won't "hurt the motor," either.

Jul 1, 2017 | 07:49 PM

cowboyshovel79

Thread Starter

Advanced

Joined: Jan 2013

Posts: 86

Likes: 1

From: phoenix az

Good to know I had Samson trueduals into 3" cans with torque cones on a shovel onece worked pretty good but it wasn't efi or an evo.
As for the 2 into one comment yes I am aware that's best but duals just look so right on a touring bike