Deleting there hardly effectives fuel economy. It lowers combustion temperatures but leaves alot of carbon deposits. Cool dense air makes horsepower not hot egr gasses. Just my two cents

 

What a dumb comment. Just like to highlight that. Also does this guy weld in bungs on the headers yo retain the egr if he upgrades exhaust?

 

Speaking of "dumb" (ignorant) comments what exactly do exhaust headers have to do with the EGR system?

 

For the smog system.. like if I wanted better performance with headers but want to keep the smog and egr.

 

Hows it dumb if you didnt figure it out.

 

There is no power to be gained from deleting, properly functioning, emissions system components with the exception of the catalytic convertor/s and the secondary air injection reaction pump (Smog pump).

Best case you would gain about 1.5 HP from the smog pump and about 10 HP from the catalytic convertors at engine speeds above 5,000 RPM on a 5.7L engine that makes 350 HP on an engine dyno and about 310 HP at the crank installed in the car.

 

The exhaust system on V8 powered 3rd gens has nothing to do with the Exhaust Gas Recirculation system. The exhaust gases supplied to the EGR system are supplied by internal ports in the exhaust runner in the cylinder head and those exhaust gases flow through ports in the cylinder head to ports in the intake manifold to the EGR valve on the intake manifold. When the EGR valve is open those exhaust gases flow through ports into the plenum of the intake manifold and exit below the base of the carburetor where they mix with the air and fuel and are distributed to each of the cylinders through the intake runners.