EGR block off.
 

What is the purpose and advantage (if any)of the EGR block off?
I know it wouldnt be legal on a street driven car but would it hurt anything on a summer only driver that sees the track 6 or 7 times a season? Thanks, KF.

EGR is Exhaust Gas Recirculation.
It was implemented for emmissions reasons. When cylinder
temperature exceeds 2500 deg F, oxides of nitrogen are produced.
To prevent this, automakers would introduce a small amount of the exhaust
back into the intake to displace some of the oxygen entering the engine thus
quenching some of the combustion and keeping cylinder temps down to a
non polluting level. However, this is undesirable in a performance engine.
You add larger turbos and intercoolers to increase the the density of your
cylinder charge. Why have an EGR valve that only counter acts your goal.
Yes, there is an advantage to deleting the EGR valve.

Thanks Rob, that was an excellent discription and technical explanation.

Thanks Rob, Being a dealer tech all my life, I know what a EGR does but was worried about more hot air entering in the combustion chamber. I was thinking it would cause detonation. From your description I see it will do the opposite. Thanks!