Cutting Cat out update
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Intermediate
Joined: Jun 2016
Posts: 49
Likes: 10
From: Montreal, Canada
Cutting Cat out update
Thanks to all over the past few weeks. Cut my cat out last night and love the new sound. Cat out, slip ons installed. New breather and I think I am all set for this year.
Thanks again everyone.
Thanks again everyone.
Cruiser
Joined: May 2016
Posts: 227
Likes: 45
From: Santa Maria
X2...Making it breathe better is always a good thing but you gotta compensate by tuning. Without you will likely run lean which means hotter temps and pops.
Extreme HDF Member
Joined: Jun 2011
Posts: 10,216
Likes: 224
From: Glendale AZ
The deceleration popping is from a lean condition in the idle circuit caused by less restrictive exhaust. Most will do that if you change just the exhaust. With a tuner, adding 5-8% more fuel in the 0-1500rpm column will all but eliminate it.
Last edited by TUCCI; Aug 16, 2016 at 03:47 PM.
Extreme HDF Member
Joined: Feb 2015
Posts: 10,907
Likes: 8,756
From: Galt's Gulch - MI
Decel popping and burbling is a creation of fuel entering the exhaust under off throttle conditions; when the AFR is right it burns off in the hot exhaust; adding fuel in off throttle situations will alter the AFR and prevent the popping and burbling, as Tucci has now posted...
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