keep the EGR or block it off????
i am about to put headers on the Z and i am currious if i should keep the egr hooked up or eliminate it completely.
any input?
any input?
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2000 WS6 T/A M6. Monster stage 3 clutch, flowmaster cat back, 4.10's, SLP lid, Hurst shifter.
1996 Mustang GT 5 speed STOCK DD
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2003 Mach 1 azure blue drag car (10.90@118 record holder for fastest N/A mach)
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1980 Mustang L 13.7: 418 stroker
1994 Z28 A4 rebuilt from wreck
1994 Z28 A4 totaled -
Stock cam & programming - you might need it to keep from pinging at part throttle cruise & up hills at part throttle. They jack the timing up & lean it out for emissions & mileage and the EGR cools down the mix and prevents pre-ignition. If you stab a cam with more overlap & duration, then it might stay cool enough w/o the EGR. Otherwise, you might need less timing, more fuel, or higher octane. -
agree with Kevin 100%
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With the new Lt-4 hotcam, I plugged it off. No problems.The Old Guy! '94 z-28, m-6, t-tops, go-fast red, 316k. Now with '96 engine w/ Lt-4 hot cam, roller rockers, heavy duty timing chain, and Spec stage 2 clutch.
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Did LT4 cars have EGR valves? I didnt think they did.. The LT4 cam had enough overlap to run without it.Originally posted by pete
With the new Lt-4 hotcam, I plugged it off. No problems.Tracy
2002 C5 M6 Convertible
1994 Z28 M6 Convertible
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The LT4 Corvette did not have an EGR system. Pretty sure the LT4 F-Body's kept the EGR valve.
There is absolutley no "downside" to keeping the EGR system.... it does not hurt performance in any way. It can help with detonation when "lugging" the engine... as Kevin very accurately pointed out. You can also think of it as a selective "displacement reduction" system.... by displacing the air in the cylinder with a little "inert" exhaust, you don't have to add the fuel that would have been used by that air.Fred
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