egr disable?
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Originally Posted by montecarlo31
Just wanted to throw this out, why, if EGRs are so great why does GM design it's LSX blocks without them. 4.8, 5.3. 6.0 do not use them and make great hp and torque and get without a doubt better fuel economy then a 4.6, 5.4
Last edited by elmo8641; Oct 14, 2007 at 06:20 AM.
New User
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newb question, but i just do not understand how taking hot exhaust gas and feeding it into the intake valve on a combustion chamber will lower the combustion chamber temps? wouldn't using cool air from the atmosphere be a better solution?
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what is required for a GAS engine to ignite? 3 simple things: oxygen, an ignition source (spark), and some kind of a fuel source (gasoline).
correct me if im wrong, but wont reusing exhaust gas (mixed with normal air) not produce as much energy or be as volitile as using pure oxygen mixed with the fuel? so as far as im looking at this, more power will be created and be able to burn more efficently using clean, air.
correct me if im wrong, but wont reusing exhaust gas (mixed with normal air) not produce as much energy or be as volitile as using pure oxygen mixed with the fuel? so as far as im looking at this, more power will be created and be able to burn more efficently using clean, air.
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Joined: Jul 2002
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From: Long Island USA
Reusing exhaust gas does cool the combustion process down. The EGR is there to lower the PEAK combustion temperatures. This reduces the formation of NOx, oxides of nitrogen, which cause smog and asthma.
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could i just build myself a set of headers and have much less back pressure allowing the exhaust to escape quickly and easier? I'm building a machine built for wheelin some trails and want the engine to be as reliable as it could be, just having the utmost basic engine controls for it run and run with as much power as it can.
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Joined: Aug 2007
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From: Canton, IL
Yep you can, as long as it does not see a paved road unless on a trailer if your in a state that cares about emmisions.
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Tuned
Joined: Jan 2009
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There's two ways to lower combustion temps 1 is the egr while adding less fuel (lean)to keep ping under control and 2 is to add more fuel to run richer like at wot. More fuel=lower combustion temps and less mpg. Like at wot.
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