Stock Cat
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Senior User
Joined: Oct 2004
Posts: 118
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From: cochise,az
Stock Cat
Whats the best way to howle it out? I have a friend who works at ford and gave it to me. Ive heard of ussing a pipe but do i have to get all the honeycomb out or just the center.
Cargo Master
Joined: Feb 2008
Posts: 2,862
Likes: 44
From: Tooele, UT
you might get lower EGT's but i doubt you are going to get a noticeable MPG difference. i got the MBRP cat delete pipe and i didn't even see a difference in my MPG's. with the kitty gone the biggest thing i noticed was the whistle was louder. thats it, but i don't have a pyro gauge yet so i don't know about the EGT's. i'm sure they went down as well.
Fleet Mechanic
Joined: Nov 2004
Posts: 1,427
Likes: 10
From: Templeton, Massachussetts
a six pack and bar works well.. I just left my kitty on the shelf in the shop, better whistle and if you remove it on a stock truck it will smoke a bit on acceleration.. Hard to tell if I actually dropped and EGTs or not since you would need to record a few exact same trips..
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Blast it super hard with a tire iron and use spell check!
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Laughing Gas
Joined: Nov 2003
Posts: 904
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From: PHOENIX
a six pack and bar works well.. I just left my kitty on the shelf in the shop, better whistle and if you remove it on a stock truck it will smoke a bit on acceleration.. Hard to tell if I actually dropped and EGTs or not since you would need to record a few exact same trips..
Fleet Mechanic
Joined: Nov 2004
Posts: 1,427
Likes: 10
From: Templeton, Massachussetts
get a six pack remove the cat,then gut it w/ a BAR.
Not go to a bar.
Posting Guru
Joined: Mar 2006
Posts: 1,798
Likes: 2
From: SoCal, SD CO. East
Most report -200 degrees on EGT's and better turbo whine but nothing more. If anything, higher exhaust pressure would decrease spool time. Removing or gutting the CAT decreases exhaust pressure... Applying that logic, and if it indeed had any effect, it would likely be undesirable.
Lead Driver
Joined: Jun 2007
Posts: 6,757
Likes: 5
From: Corvallis, OR
It reduces pressure after the turbo, which increases the pressure drop through the turbo, which mean more energy transferred to the turbo. It probably would decrease spool time, but maybe not noticeably.
Elder User
Joined: Dec 2007
Posts: 971
Likes: 1
From: IA MN SD
I'm with cartmanea... seems to me that decreasing the post-turbo exhaust pressures would increase the pressure differential across the turbo. It would still take the same upstream pressure to turn the turbine blades, so upstream pressures wouldn't be changed by gutting the turbo.
No first hand experience with this. That's just how I envision it.
No first hand experience with this. That's just how I envision it.