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Old 10-02-2019, 01:32 PM   #1
mike88a
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89 tbi egr/headers?

I have an 89 tbi going in to my 87. I want to add headers in the most cost effective way possible. What do I do about the egr?
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Old 10-02-2019, 01:34 PM   #2
mike88a
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89 tbi egr/headers?

Dropping an 89 tbi motor into my 87 and want to add headers int eh most cost effective way I can. What do I do about the egr?
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Old 10-02-2019, 01:55 PM   #3
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Re: 89 tbi egr/headers?

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Originally Posted by mike88a View Post
I have an 89 tbi going in to my 87. I want to add headers in the most cost effective way possible. What do I do about the egr?
There aren't any egr tubes on 87-95 engines. The valve gets it exhaust source from the exhaust crossover in the intake manifold.

There may be air injection tubes in the exhaust manifolds. Any chance that's what you see?
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Old 10-02-2019, 03:15 PM   #4
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Re: 89 tbi egr/headers?

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Originally Posted by mike88a View Post
Dropping an 89 tbi motor into my 87 and want to add headers int eh most cost effective way I can. What do I do about the egr?
The EGR is part of the ECM loop so you need to keep it or have it deleted by tuning (new chip). Whatever headers fit your chassis will get the job done. You just need an o2 port near the collector.
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Building a small, high rpm engine
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like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.

Cubic inches is like Indiana Jones with a cheap pistol....
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Old 10-02-2019, 03:19 PM   #5
mike88a
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Re: 89 tbi egr/headers?

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Originally Posted by 95 S_Trucker View Post
There aren't any egr tubes on 87-95 engines. The valve gets it exhaust source from the exhaust crossover in the intake manifold.

There may be air injection tubes in the exhaust manifolds. Any chance that's what you see?
Possibly. I just keep seeing headers that say for models without egr.
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Old 10-02-2019, 04:37 PM   #6
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Re: 89 tbi egr/headers?

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Originally Posted by SCOTI View Post
The EGR is part of the ECM loop so you need to keep it or have it deleted by tuning (new chip). Whatever headers fit your chassis will get the job done. You just need an o2 port near the collector.
Perfect. Thanks
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Old 10-02-2019, 04:38 PM   #7
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Re: 89 tbi egr/headers?

Got it all sorted out. I was thinking about it all wrong.
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Old 10-02-2019, 05:04 PM   #8
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Re: 89 tbi egr/headers?

if full length headers its best to swap to a heated o2 sensor . lots of threads on this for your reading .

i my self dont care for headers . lots of extra heat and noise under the hood .
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Old 10-02-2019, 05:58 PM   #9
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Re: 89 tbi egr/headers?

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if full length headers its best to swap to a heated o2 sensor . lots of threads on this for your reading .

i my self dont care for headers . lots of extra heat and noise under the hood .
Heat for sure. Mine are ceramic coated & still put off some serious temps. I haven't had any issues on the noise level though. Are they louder than cast iron manifolds? Yep. But I don't notice any difference w/the hood shut. I also ground the head flanges true & made my own 3/8" thick collector flanges so zero leaks vs. the repeat leaker on my exhaust manifolds (pass side).
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Building a small, high rpm engine
with the perfect bore, stroke and rod ratio is very impressive...
like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.

Cubic inches is like Indiana Jones with a cheap pistol....
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Old 10-02-2019, 06:49 PM   #10
mike88a
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Re: 89 tbi egr/headers?

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Originally Posted by sweetk30 View Post
if full length headers its best to swap to a heated o2 sensor . lots of threads on this for your reading .

i my self dont care for headers . lots of extra heat and noise under the hood .
Thanks for the help. It is my sons build. We are going mid length headers with a o2 bung in the collector so I think a regular o2 sensor will work. The noise is part of the fun and the heat is not that bad. But that is the beauty of our trucks to each his own. I truly appreciate your assistance!
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Old 10-02-2019, 06:51 PM   #11
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Re: 89 tbi egr/headers?

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Originally Posted by SCOTI View Post
Heat for sure. Mine are ceramic coated & still put off some serious temps. I haven't had any issues on the noise level though. Are they louder than cast iron manifolds? Yep. But I don't notice any difference w/the hood shut. I also ground the head flanges true & made my own 3/8" thick collector flanges so zero leaks vs. the repeat leaker on my exhaust manifolds (pass side).
I know I did ceramic coated in my 67 to help with the heat issue but i don't think it made any difference. All in all if you keep the wires away its not that bad.

Thanks for your input!
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Old 10-03-2019, 07:38 AM   #12
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Re: 89 tbi egr/headers?

good deal, i just sold a set with air tubes ( capped), and bought the non air tube versions.
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Old 10-03-2019, 02:29 PM   #13
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Re: 89 tbi egr/headers?

I had my chip/tune done w/the air pump option deleted since there wasn't one. But mine was/is a 1TON dually & didn't have CATs either.
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Building a small, high rpm engine
with the perfect bore, stroke and rod ratio is very impressive...
like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.

Cubic inches is like Indiana Jones with a cheap pistol....
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Old 10-14-2019, 06:56 PM   #14
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Re: 89 tbi egr/headers?

I. On my 94 I deleted the egr and 02 sensor with out tuching the computer and it never made a difference. I have long tube headers and no cats . Same amount of power. Runs the exact same. And never had a problem. I also got rid of the e vap canister. You can tell where I live there is no inspection
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