Topic: egr or no egr ?
in Forum: C3 Engines
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Lifetime MemberEGR is just an emissions gaget. It adds heat to the intake and robs your motor of performance so if you don't have to have it then get rid of it.
Brian - NCM Lifetime Member
73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
Leather seats, Seatbelt Plus 3point seatbelts, Pioneer CD player
Magnaflow Exhuast System
Dewitt radiator and dual electric fans
Borgeson Steering box
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The EGR also stops pinging by lower combustion temp to below 2500 deg F. If the ping is not a problem, you don't need the EGR. It also produces NOX at that temp.
The hose is routed to a TVS (thermo vacuum switch) that prevents the EGR from working when the engine is cold, and it's a hinderance instead of a help.
You probably won't need it with headers. And if it pings, you can use higher octane or retard the timing a bit to stop it.
My '79 came to me with the EGR removed and a block off plate installed.
I was told by quite a few "car guys" that it'd be better left off because the car will run cooler and horsepower can then increase because of that.
I noticed that the cheap unleaded fuel caused a bit of pinging. I always run 91 Octane in it now and get no pinging that I'm aware of.
I purchased an Edelbrock Performer and went with the Non EGR.
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Lynn Haven, FL - USA
Joined: 12/8/2007
Posts: 54
Vette(s): 1980 Frame Off Restore, Gun Metal Grey with Dark Red interior. 350 four bolt with forged pistons, Crane Cam, 1990 Tuned Port Injection System, Headman Elite Headers. Fairbanks Automatics, Detroit Locker Rear, High Performance Suspension.
Thanks fo the advise everyone. Mine is going to be removed before startup. Hopefully in early April.
Live to Cruise 
in Forum: C3 Engines
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