Where is my EGR on my 302

[treihesse]

Where is it?? picture would help

 

[Bronco717274]

What year is it you might not have one. If you do it's right behind the carb.

 

[treihesse]

i have a 75

 

[Bronco717274]

Should be on the plate under your carb. at the back of your engine, with a vaccume line going to it.

 

[treihesse]

i have a edelbrock 1406 and I dont think I have one?? Any pictures

 

[Bronco717274]

If not stock you might not have one, I'll go out in the morning and take some pic.

 

[treihesse]

i need to install one for the state

 

[904Bronco]

i need to install one for the state

They may make you go back to the factory carb too...

 

[treihesse]

no im good there

 

[Explorer]

Pearlcoat has exactly what you need. Edelbrock performer 302 intake with EGR spacer plate that was running a 1406.

 

[cgbexec]

Is it my imagination that running an egr would make your engine less efficient causing you to burn more gas under normal city driving conditions?

Somehow sending exhaust back to the intake to make an engine run cleaner just doen't compute.

 

[Pearlcoat]

This is mine, just came off a 77. EGR has to be in place to pass state inspection. Manifold with EGR is for sale due to switching to EFI.

Pearlcoat has exactly what you need. Edelbrock performer 302 intake with EGR spacer plate that was running a 1406.

 

[Broncobowsher]

Is it my imagination that running an egr would make your engine less efficient causing you to burn more gas under normal city driving conditions?

Somehow sending exhaust back to the intake to make an engine run cleaner just doen't compute.

It's your imagination.
The EGR actually works best at steady state cruise conditions more then in town driving.
Exhaust gas is inert in a combustion chamber. It has already burned, it isn't going to add anything. But it does a few neat tricks. Since it takes space and must be squeezed, it adds to cylinder pressure. Compression makes engines efficeint (detonation limits compression ratios). The more you squeeze the air, the more power you get out of it. This is for the same drop of gasoline too. Numbers vary but some good sources state ½MPG highway improvment. As for emissions, it does another trick. As the mix of air and fuel burns in makes a huge amount of heat. That high heat fuses some of the nitrogen to some of the oxygen and makes NOx emissions. Diesel engines with the super high compression ratios makes a lot of it. One of the tricks (besides lowering the compression ratios and jacking up cam timing) that works to help NOx emissions is the EGR. That dead air in the combustion chamber acts as a heat sink. It absorbs some of that spike of tempertures in the combustion chamber to reduce the Nitrogen fusing with Oxygen. The other trick for NOx is to run a slightly fat mixture an use the fuel to cool the combustion chamber and burn off all the Oxygen, but you get high CO emissions doing that trick. Amazing what a 4-year college degree in Automotive Technology will teach you.

The bad part about EGR with caburators is the calibrations are horrible. They may have done the trick back in the day, but the controls just sucked. Problems with the passages plugging up with carbon, carburator calibrations sucked as it had to run both with and without the EGR open depending on temperture. EFI fixed most of the short comings.

To get the EGR to work you are going to need an EGR manifold with the internal EGR passages. The EGR plate for under the carb and usually some tuning of the carb to match. Hopefully you can pass without it. In that case leave the non-EGR manifold and slip the EGR spacer under the carb as eye candy and pass the test.

 

[Rox Crusher]

facing same issue here in Colorado but they will let you by if you don't have an EGR if it actually passes emissions test

Also, they will let you by without air / smog pump (assuming you have automatic transmission) since we are considered a High Altitude state