EGR elimination

[Scrapla]

After installing my BBK FPR and gauge my EGR wont fit. I ordered the elmination plate from UPR anything else go along with elminitating the EGR besides pluggin the vaccum line?

[vristang]

From my website...
http://www.freewebs.com/vristang/50e...sequipment.htm

EGR Theory and Notes on Removal

Vristang

The EGR (Exhaust Gas Recirculation) is an emissions device that reduces NOx by decreasing the combustion temperature. NOx (Nitrogen Oxides) are only formed when enough Oxygen and Nitrogen are present and combustion temps are very high. Small reductions in combustion temps can have large effects on NOx output. EGR reduces combustion temps by displacing Oxygen from the intake charge with an inert gas (Recirculated Exhaust). The decrease in Oxygen lowers the efficiency of the combustion process, and therefore the peak temperatures reached during combustion.

Due to the decrease in the efficiency of the combustion process, the EEC-IV computers will increase spark advance when the EGR is functioning. The EGR will only function at part throttle conditions. The EGR is turned off at WOT, and therefore has no affect on WOT power.

Since the efficiency of the combustion process is being decreased, less power is being created. This will cause the driver to open the throttle a little more, to maintain an appropriate level of power for the driving situation. An open throttle body is easier for the motor to breathe through - the pumping losses are lower.

Due to the fact that the spark can be advanced and that the throttle can be opened farther (reducing pumping losses), one can actually see a gain in fuel economy due to the use of EGR.

Also worth mentioning is the coolant system that runs to the EGR or EGR spacer. Ford put the coolant lines there for a reason. The EGR gasses are rather hot when they hit the intake manifold. The coolant in the EGR spacer is supposed to help lower the temperature of the Exhaust gasses before they hit the fuel. If these coolant lines are removed, the extremely high temps of the exhaust gasses, mixed with the intake air/fuel charge can lead to part throttle detonation. Ford used the coolant to lower the temperature of the exhaust gasses to a resonable level. If you are running the EGR valve, it is advisable to leave the coolant lines intact.


Summary-

The EGR system does not affect WOT power, and can even improve part throttle fuel economy. Additionally, since the computer is adding spark advance when the EGR should be functioning, removing the EGR (and not telling the computer that the EGR is gone) can result in some very bad ping/detonation at part throttle.



Myth –

Some folks misunderstand what the EGR is, and will tell you that the EGR pulls the exhaust into the combustion chamber to burn any unburned fuel in the exhaust, therby reducing Unburned HydroCarbons. This myth seems to have originated in the days of carburetion, when the understanding of emissions by the public was still rather poor. Remember, the EGRs primary function is to reduce NOx.


This site has some info on the EGR plug which can be used to prevent the check engine light from coming on after disabling the EGR system. http://fordfuelinjection.com/index.php?p=61