EGR removal

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01-08-2008, 08:05 AM

#21

Norm Peterson

6th Gear Member

Join Date: Feb 2007

Location: state of confusion

Posts: 7,635

RE: EGR removal w/ pics

Quote:

ORIGINAL: Scott H.

Removing the EGR toincrease part throttle driveability is masking conditions in a detrimental fashion, not resolving the root cause. Carburetion and timing are much better avenues to persue.
Understand, the combustion chamber shape, squish band, cam, intake, EGR, etc, were all engineered to work together.
In a mechanically sound engine, if you want to increase throttle response, replot your cruise mixture, accelerator circuit, and timing. You'll end up with greater overall performance, longevity, fuel mileage and reduced emissions.

EGR itself is something of a band-aid, at least in doses larger than what naturally occurs. So I'm still skeptical about there being any improvement in overall performance to be had by having it present. At this point, I think that we can define performance in terms of torque output with respect to throttle opening and load, and response being changes in those things over small time steps- those are the things that I see as being important with respect to part throttle acceleration anyway. Inert material in the cylinder does not by definition contribute to performance. Ignoring the MPG and NOx issues for a moment, any increased concentration of inerts necessarily detracts from what would otherwise be available. Drivers can (and probably do) learn to use slightly more throttle as a result, but that isn't a performance increase per se. Just an increased demand.

Norm

01-08-2008, 09:19 PM

#22

Scott H.

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RE: EGR removal w/ pics

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Last edited by Scott H.; 01-16-2010 at 08:46 PM.

01-08-2008, 09:36 PM

#23

flyingfool

3rd Gear Member

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Join Date: Oct 2006

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Posts: 827

RE: EGR removal w/ pics

wow, had no idea this thread would turn into such an interesting one! as far as performance goes, in my head the EGR basic theory just didnt fit so well. old gases being put in cylinders!? I wouldnt want to breathe old air!im learning. yay.

01-09-2008, 06:59 AM

#24

falconfixer

1st Gear Member

Join Date: Oct 2007

Posts: 138

RE: EGR removal w/ pics

[/quote]
Inert material in the cylinder does not by definition contribute to performance. [/quote]

Yeah, but... You must take a total system view. Water injection (inert material) allows a greater advance and more HP.

Me? Building an engine for HP? I would delete it. Daily driver? I would not.