Removing EGR walls in TPI
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From: Connecticut
Car: 1992 Camaro RS
Engine: 5.0L TPI
Transmission: 5-speed
Removing EGR walls in TPI
After reading the post "Create Better Air Flow for TPI Plenum" in the FAQs, I'm seriously considering having the shrouds in front of the EGR holes machined down. What are the pros and cons of doing something like this?
Joined: Dec 2004
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Removing EGR walls in TPI
No cons , the pros better flow. if you look how much the hump blocks entering air flow for the first 3/8 inch of throttle movement.
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From: Connecticut
Car: 1992 Camaro RS
Engine: 5.0L TPI
Transmission: 5-speed
Re: Removing EGR walls in TPI
Why would they put the humps there in the first place? Any estimate as to how much it might cost to have these machined down?
Joined: Dec 2004
Posts: 16,889
Likes: 1,013
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Removing EGR walls in TPI
Get out a carbide bit and grind them down. They were installed as a dividing was between the egr ports to help block and blend the exhaust gasses. Its not like your in for a huge butt Dyno gain !.
Joined: Apr 2005
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
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Joined: Jun 2011
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From: Connecticut
Car: 1992 Camaro RS
Engine: 5.0L TPI
Transmission: 5-speed
Re: Removing EGR walls in TPI
Awesome did you do that yourself or have someone do it for you? How much power did you gain? Also, what is the stock throttle body size? Is it 52mm?
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Joined: Apr 2005
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
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