Attention - "!EGR" is a BAD thing!
Originally Posted by Billiumss
One of the main differences in the 1998-2000 and 2001-2002 cars is the high octane timing tables.
My 2001 didn't come with a EGR, so with that said, I guess GM engineers decided it was not needed after all.
My 2001 didn't come with a EGR, so with that said, I guess GM engineers decided it was not needed after all.
Thread Starter
Teching In
Joined: Dec 2001
Posts: 387
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From: Southern IN, USA
Originally Posted by Nic00Z28M6
How can replacing an inert gas (EGR) with oxygen rich air (removing EGR) be bad for performance. Last I checked more oxygen and more fuel produced more horsepower. I didn't buy my car for economy, I bought it for performance.
More O2 and fuel DO make more fire, but it's how that fire is contained, pressurized, and controlled that is the issue in performance.
One factor, clarified, is that the modern EGR allows for an advanced spark, which actually increase the pressure on the piston (better combustion) for more power/economy at most mid-throttle settings. And, yes, with all EGR systems it is disabled at WOT - even the EPA still allows an unregulated WOT.
Last edited by emarkay; Jul 1, 2004 at 01:04 PM. Reason: spelling
Thread Starter
Teching In
Joined: Dec 2001
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From: Southern IN, USA
Originally Posted by rotarnomore
You add an inert gas at about a 75% rate all the time - it's called Nitrogen. Just something to think about because I don't see how adding a hot exhaust gas could help improve HP. Economy and emmissions yes, but I have yet to see a top fuel car with an EGR.
Chris
Chris
Top fuel cars don't need no stinikin' part throttle regimes, nor are they tuned for anything other than maximum power. Also see the LS2/LS6 as an application where EGR is not necessary, but it's function still exists in the design of the PCM and hardware in the engine.
Originally Posted by emarkay
Jeez - did ya' even READ beyond the title of this thread?
That all makes perfect sense. 
TECH Veteran
Joined: Sep 2002
Posts: 4,469
Likes: 3
From: NW Houston
With that being said if you delete the EGR on -00 should you use the 01+ timing tables to help compensate? What other tables will be affected by this
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