need a retune?

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Jan 25, 2021 | 05:36 PM

XJBluto

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5th Gear

Joined: Mar 2014

Posts: 9

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From: St. Louis

need a retune?

I have a 2018 Road Glide Ultra thatI did a stage 1 with Vance and Hines Power Flow Headers and Eliminator 400 mufflers and a screaming eagle breather and Dyno tuned with an OEM harley street tuner . The exhaust is louder than I want . Vance and Hines just released quiet baffles for the mufflers, but I don't want to pay for another Dyno/tune. Can I put the quiet baffles on and not retune?
Thanks in advance.

Jan 25, 2021 | 06:08 PM

eaglefan1

Stellar HDF Member

Joined: Aug 2015

Posts: 3,441

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From: pensacola fl

I don't know if you need to or not, but tuning is not an area to skip as you know all ready. If its under warranty and the dealer is doing the work, ask them. If you have a indy that you can talk to I would definitely ask them.
Could also ask on the tech forum. Lots of top notch tuners over there.

Jan 25, 2021 | 06:12 PM

TriGeezer

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Joined: May 2012

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From: Carlsbad, CA

Put in the baffles and see how it runs. It won’t blow up.

Jan 25, 2021 | 07:02 PM

skydude426

Club Member

Joined: Sep 2010

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Jan 25, 2021 | 07:16 PM

Weeboy1

Stellar HDF Member

Joined: Mar 2015

Posts: 2,947

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From: Winnipeg

The ECM is more than capable of adjusting for minor changes. Changing a baffle style would fall under minor change. You’ll be fine....don’t ask the dealer!

Jan 25, 2021 | 09:35 PM

Neggy ZRXOA 5248

Stellar HDF Member

Joined: Nov 2005

Posts: 3,183

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From: KMHT KFMY

If anything the quieter baffle will cork it up a little, which is a lot better than increasing flow substantially , something that would cause a lean condition.

Slide the new baffles in and ride it, look at the plugs in 500 miles, they will tell you if you are lean, rich, or spot on

Jan 25, 2021 | 10:09 PM

bdtaylor1979

Ultimate HDF Member

Joined: Feb 2009

Posts: 5,132

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From: Garland, TX

Quote:

Originally Posted by TriGeezer

Put in the baffles and see how it runs. It won’t blow up.

Exactly

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Jan 26, 2021 | 09:27 PM

bklynbob

Grand HDF Member

Joined: Mar 2008

Posts: 4,997

Likes: 655

From: bklyn,ny

I don’t think it will make much of a difference with the Harley tuner. Wait till you’re off warranty and get a dyno tune with one of the real aftermarket tuners.