TPI Plenum cleaning
Member

Joined: Feb 2012
Posts: 350
Likes: 1
From: Woodbridge, New Jersey
Car: 1991 Camaro Z28
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: 2.73
Re: TPI Plenum cleaning
This stuff... http://www.nevrdull.com/
I used it on mine. It takes off baked on deposits and even shines it up a little. Came out nice for me. Just wear gloves when using it. Take a chunk of it, rub it on the area you are cleaning, let it sit for a couple of minutes then buff it with a microfiber towel. Done. The material, your hands and the towel will be black. Thats how you know its working. You can buy it in Wal Mart, Pep Boys, and stuff like that. Heres mine. Not too shiny and looks good.
I used it on mine. It takes off baked on deposits and even shines it up a little. Came out nice for me. Just wear gloves when using it. Take a chunk of it, rub it on the area you are cleaning, let it sit for a couple of minutes then buff it with a microfiber towel. Done. The material, your hands and the towel will be black. Thats how you know its working. You can buy it in Wal Mart, Pep Boys, and stuff like that. Heres mine. Not too shiny and looks good.
Supreme Member
iTrader: (3)
Joined: Jul 2005
Posts: 1,062
Likes: 71
From: New York
Car: 1989 Firebird Formula 350
Engine: 5.7
Transmission: 700R4
Axle/Gears: Stock
Member

Joined: Feb 2012
Posts: 350
Likes: 1
From: Woodbridge, New Jersey
Car: 1991 Camaro Z28
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: 2.73
Re: TPI Plenum cleaning
You can also give purple power degreaser a shot. That stuff is like magic. Then use the never dull after that
Joined: Oct 2011
Posts: 914
Likes: 16
From: Imperial, Missouri
Car: 89 IROC/89 Vert/87 Vert/89 GTA Vert
Engine: 5.7/5.0/5.0/5.7
Transmission: 700R4
Axle/Gears: 9" 2.77/9" 3:23/9" 3:42
Re: TPI Plenum cleaning
marked
thanks guys - TPI off, new motor going in, want to clean it up!
thanks guys - TPI off, new motor going in, want to clean it up!
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Junior Member
Joined: Feb 2012
Posts: 19
Likes: 0
From: Texas
Car: 1987 IROC
Engine: 350
Transmission: 700R4
Axle/Gears: 3.23
Re: TPI Plenum cleaning
I borrowed some industrial degreaser from work. I filled up a wash tub with it and left the plenum, risers and, lower intake soak for like 3 days then hit real quick with a pressure washer. The whole setup looks brand new and the hardest thing I had to do was pull start the pressure washer. It even cleaned out all of the ports and tubes.
Member
Joined: Dec 2005
Posts: 428
Likes: 0
From: Friendswood/Pearland
Car: '92 Heritage Z28 Convertible
Engine: 305
Transmission: T5
Re: TPI Plenum cleaning
I purchased the Neverdull specifically because it was recommended here. It didn't do much (if anything) on my plenum. Maybe because it wasn't that dirty to begin with?
Joined: Feb 2003
Posts: 2,498
Likes: 20
From: PNW
Car: 91 Black Formula KR
Engine: 305 TPI R69/G92
Transmission: Astro A5-Pro 5.0-McCleod
Axle/Gears: US Gear 3.42 Eaton True Trac
Re: TPI Plenum cleaning
I wouldn't try this with the TPI stuff on the car, but I have a spare plenum I may try...
The Eagle One Aluminum Mag Wheel Cleaner is like magic on the turbo cast wheels...
Wo I'll try it on the plenum and see.... it's harsh stuff, though, so I don't know about it getting on any rubber parts...
Raf
The Eagle One Aluminum Mag Wheel Cleaner is like magic on the turbo cast wheels...
Wo I'll try it on the plenum and see.... it's harsh stuff, though, so I don't know about it getting on any rubber parts...
Raf
Joined: Sep 2005
Posts: 871
Likes: 4
From: Yreka, in the State of Jefferson
Car: 1991 red Z/28
Engine: 350 TPI
Transmission: T5 swap
Axle/Gears: 3.42
Re: TPI Plenum cleaning
Neverdull didnt do anything for my plenum or runners, except get the top layer of dirt off. I had to glass bead my intake because it was so dirty. I may try the purple power degreaser on the runners and plenum.
Junior Member

Joined: Mar 2007
Posts: 28
Likes: 2
From: Tampa, FL
Car: 1991 Z28
Engine: 305
Transmission: 5 Sp
Axle/Gears: 3.42
Re: TPI Plenum cleaning
I bought a $20 hand held sand blaster from Harbor Freight and a container of glass beads. The intake came out looking near new when I was finished. I did this with the intake off the car. I did the upper, lower and intake runners.
Member

Joined: Feb 2012
Posts: 350
Likes: 1
From: Woodbridge, New Jersey
Car: 1991 Camaro Z28
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: 2.73
Re: TPI Plenum cleaning
Not sure why you guys had no luck with the never dull. It shined up my runners like in my picture in my above post, and cleaned the plenum as well. Its not going to shine the plenum, but it will clean it off a bit. Good luck
Re: TPI Plenum cleaning
I used a wire wheel to the outside and then welded a small wheel on a 12 inch metal rod to get the insides of the runners. The outside came off no problem, and the inside contained 3 handfulls of deposits that I cleaned out as well. Then after that I took one of those headlight restore kit buffer things that goes on the drill and went at it with brasso. As you can tell in the picture, a mirror finish this aint, but its waay cleaner than when I started. I could also spend a hour or two more polishing it once I get these oil leaks patched up. Shes shining bright tho! good luck to ya
Last edited by Camarobreaker; Jul 2, 2013 at 11:22 AM.
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