Selling EGR block off plates (aluminun) need dimensions
Selling EGR block off plates (aluminun) need dimensions
I am getting ready to fabricate and sell aluminum EGR block off plates. I need the dimensions for all engines. If you are the first to post for an engine model with the correct dimensions you will get a plate free. Thanks for the help in advance.
Senior Member
Joined: Jul 2007
Posts: 1,305
Likes: 1
From: Corner Brook, NL
Car: 1984 Z28 HT,2006 2500HD
Engine: 5.7L, 6.6Llbz dmax
Transmission: 700R4, 6 speed allison
Axle/Gears: worn out 3.73 posi
Re: Selling EGR block off plates (aluminun) need dimensions
1984 z28
A=2 1/4"
B=2 3/8"
C=3 1/8"
D=2 1/8"
its a bit of an odd shape to get good measurements but i hope this helps a little
A=2 1/4"
B=2 3/8"
C=3 1/8"
D=2 1/8"
its a bit of an odd shape to get good measurements but i hope this helps a little
Re: Selling EGR block off plates (aluminun) need dimensions
Senior Member
Joined: Jul 2007
Posts: 1,305
Likes: 1
From: Corner Brook, NL
Car: 1984 Z28 HT,2006 2500HD
Engine: 5.7L, 6.6Llbz dmax
Transmission: 700R4, 6 speed allison
Axle/Gears: worn out 3.73 posi
Re: Selling EGR block off plates (aluminun) need dimensions
the manifold is from a 305 and the 350 wasn't available in 84. im using the manifold on my 350 though. and sure a free one would be nice, but i am in Canada if thats a problem. if not ill pm you my address.
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Joined: Jun 2008
Posts: 1,468
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From: Minnesota
Car: 89 IROC-Z
Engine: 370 LSX, LS3 Top End
Transmission: Built T-56
Axle/Gears: 9" Aluminum Center 3.89's
Re: Selling EGR block off plates (aluminun) need dimensions
How much are you going to sell them for? That pic looks nothing like a TPI egr block off plate. (100-021 for TPI camaro/firebirds)

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Senior Member
Joined: Jul 2007
Posts: 1,305
Likes: 1
From: Corner Brook, NL
Car: 1984 Z28 HT,2006 2500HD
Engine: 5.7L, 6.6Llbz dmax
Transmission: 700R4, 6 speed allison
Axle/Gears: worn out 3.73 posi
Re: Selling EGR block off plates (aluminun) need dimensions
Junior Member
Joined: Jan 2009
Posts: 27
Likes: 0
From: utah
Car: 1986 iroc-z
Engine: lt1 intake 406
Transmission: 700r4
Axle/Gears: stock 89 gta 10 bolt 3.42 non posi
Re: Selling EGR block off plates (aluminun) need dimensions
the one for tpi is
3 1/16 inch hole to hole, 3 3/4 long over all, and 1 4/16 wide.
this is off an 86 tpi 305
3 1/16 inch hole to hole, 3 3/4 long over all, and 1 4/16 wide.
this is off an 86 tpi 305
Junior Member
Joined: Jan 2009
Posts: 27
Likes: 0
From: utah
Car: 1986 iroc-z
Engine: lt1 intake 406
Transmission: 700r4
Axle/Gears: stock 89 gta 10 bolt 3.42 non posi
Re: Selling EGR block off plates (aluminun) need dimensions
sorry for the crapy pic this is the corect size the first width was wrong the one on the pic is corect.
Re: Selling EGR block off plates (aluminun) need dimensions
cool thx bitchin I still need the TBI if anyone can get it. I can't start making and selling these until I get all the specs for all of them. I have someone standing by to get these going.
Joined: Dec 2000
Posts: 2,361
Likes: 2
From: Buffalo, NY
Car: 1984 Trans Am
Engine: LT1
Transmission: T56
Axle/Gears: 10 bolt w/ 4.10 gears
Re: Selling EGR block off plates (aluminun) need dimensions
No precision or tolerances needed, just eyeballed with whatever ruler was lying around for all you know. You don't even know what size bolts are used for each application to know what size hole has to be drilled (because those dimensions aren't provided either). Only one of the pictures posted gives a dimension for the distance between the centers of the bolt holes. If you can't get ahold of copies of GM drawings, you could at least get actual parts in your hands to take accurate first-hand dimensions.
Junior Member
Joined: Aug 2007
Posts: 21
Likes: 0
From: pryor oklahoma
Car: 91 rs
Engine: 305 tbi
Transmission: 700r4
Axle/Gears: 2.73
Re: Selling EGR block off plates (aluminun) need dimensions
why dont you just cruize on down to autozone and spend a dollar on the egr gasket? thats what i did for my tbi now i gotta figure out how to ritchen my a/f mix back up cause i'm runnin lean.
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Posts: 861
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From: ILL
Car: 1986 Pontiac TA
Engine: 383
Transmission: 700R4
Axle/Gears: 3.70
Re: Selling EGR block off plates (aluminun) need dimensions
I have an old egr and intact gasket if you want to give me your address so you can use them for a template came off my 1989 gmc Sierra SLE k1500 350ci 5.7L tbi
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Joined: Sep 1999
Posts: 3,016
Likes: 818
From: Colorado USA
Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 ..
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