Emptying Mid-pipe catalytic converter
Melting Slicks
Joined: Jun 2019
Posts: 2,038
Likes: 928
From: near philly
yes, and it will effectively reduce performance compared to leaving it in place.
The increased diameter of the cat tubing accounts for the volume taken up by the honeycomb so the exhaust flow remains constant velocity throughout the entire pipe.
when you hollow it out you have high velocity gas going into a bigger diameter causing a rapid slow down, then immediately followed by a narrowing forcing a rapid speed up
of the gases.
This creates a big turbulent section and backpressure area in there and is WAY worse than just leaving the honeycomb in place.
If you are dying to get rid of them you either need a new X pipe with no cats for cut them out and weld in a matching pipe section
The increased diameter of the cat tubing accounts for the volume taken up by the honeycomb so the exhaust flow remains constant velocity throughout the entire pipe.
when you hollow it out you have high velocity gas going into a bigger diameter causing a rapid slow down, then immediately followed by a narrowing forcing a rapid speed up
of the gases.
This creates a big turbulent section and backpressure area in there and is WAY worse than just leaving the honeycomb in place.
If you are dying to get rid of them you either need a new X pipe with no cats for cut them out and weld in a matching pipe section
Instructor
Joined: Apr 2019
Posts: 165
Likes: 56
From: Raleigh, NC
Le Mans Master
Joined: Jun 2019
Posts: 5,481
Likes: 2,190
From: Loveland
For $270 you can get an EOS x-pipe and keep the original, they sound good. I am not sure what you could do to remove the insides of the secondary CAT's.
https://extremeonlinestore.com/produ...AaAm67EALw_wcB
https://extremeonlinestore.com/produ...AaAm67EALw_wcB
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Melting Slicks
Joined: Jun 2019
Posts: 2,038
Likes: 928
From: near philly
for the flow reasons I mentioned above
if you have access to a welder the cheapest way would be to cut the cats out and weld in straight sections