A Simple 455 EGR Question
#1
A Simple 455 EGR Question
So I've been thinking of disabling the EGR system on '75 455 and from what I've gleamed from the FSM, it looks like if I remove the vacuum line running between the carb and the EGR valve, capping off the connection to prevent a vacuum leak, that would effectively keep the EGR valve from opening, effectively disabling the system. Is this correct or am I missing something?
#4
Yes that works, but the EGR only opens at part throttle cruise. It has no effect at other operating points. If the EGR system is working properly, there will be zero performance difference (however I'm sure the butt dyno will show at least a 2 second improvement in quarter mile times).
#6
Yes that works, but the EGR only opens at part throttle cruise. It has no effect at other operating points. If the EGR system is working properly, there will be zero performance difference (however I'm sure the butt dyno will show at least a 2 second improvement in quarter mile times).
Plus it'd be nice if I could keep exhaust gases from depositing carbon and other crap in my intake.
#7
If all you're doing is capping the vacuum ports and leaving the EGR valve in place, that isn't "cleaning up" very much. Also, the carbon mainly comes from reversion, which is the exhaust pulse that goes into the intake when both intake and exhaust valves are open at the same time (the overlap part of your cam profile). Removing the EGR isn't going to change that much.
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