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Old 10-24-2010, 11:50 AM   #11
arlenn
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Quote:
Originally Posted by norcalfocus01 View Post
Again it is closed at idle and WOT so most people that remove it, are preformance geared. Because they are running their car at WOT they don't want to put the hot air back into their intake.
you just contradicted yourself.

if working correctly EGR is transparent. They often do not work correctly. The are superfluous in a performance arrangement, extra weight and complexity. If it is working correctly, nothing but loss of mid range fuel mileage will occur by removing it. (then you have to convince the DPFE not to code, if you remove w/o a flashing it out of the computer).
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Old 10-24-2010, 12:08 PM   #12
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you gain nothing in performance. I say just leave it hooked you and gain some mpg and save you self a little money
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Old 10-24-2010, 01:04 PM   #13
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Quote:
Originally Posted by arlenn View Post
you just contradicted yourself.

if working correctly EGR is transparent. They often do not work correctly. The are superfluous in a performance arrangement, extra weight and complexity. If it is working correctly, nothing but loss of mid range fuel mileage will occur by removing it. (then you have to convince the DPFE not to code, if you remove w/o a flashing it out of the computer).
I don't see my contradiction?

Yes most people that have it deleted have tunes to turn off the codes. And you just made my point, if I'm running the car at or near WOT all the time I can care less if I loose mid range gas mileage.

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you gain nothing in performance. I say just leave it hooked you and gain some mpg and save you self a little money
Your right, you gain nothing in performance. For the majority of us its better left on. But on a track car its one less thing to break. The EGR is a weak link on a high performance engine.
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Old 10-25-2010, 01:34 PM   #14
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^^^^

you stated that the EGR system is "closed" (no flow) at idle and WOT, which is correct. then go on to state that performance minded people delete the ERG so they are not flowing hot exhaust gasses at WOT. if the valve is closed at WOT, no flow, no introduction of exhaust gasses at WOT.
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Old 10-25-2010, 02:22 PM   #15
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he's saying you won't have the chance of it opening if you delete it. on any track car there is no way you r keeping it at wot the entire time. those times that your not at wot, it wont be recirculating exhaust gases, therefore reducing iat's
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Old 10-26-2010, 08:51 AM   #16
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I agree w/ that statement, but that is not what was written.

EGR is not simply hot air, it unburnable exhaust gasses, void of oxygen.. EGR is used to reduce volumetric efficenty of the engine. But yes, it will warm the intake air. Warm intake will give you better fuel atomization with reduced air density, less power. But if you are not at WOT you are not demanding full engine power anyway. I dont have a clue of the intake manifold volume, 4L? so if we go to a WOT state, you will clear the intake manifold in ~4 revolutions? at 2000-3000 rpm, you will exchange the hot charge in the intake manifold pretty bloody quicky.

Unless your car spends alot of time on the track or are in an emissions controlled state there is really no reason to delete it, which was stated above.
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Old 10-26-2010, 09:28 AM   #17
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i deleted it with my svt header install. city mpg dropped 2-4mpg. but i gained that back on the highway.
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Old 10-26-2010, 02:13 PM   #18
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damn, 4 mpg? i get combined 30-32, its really gonna drop?

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Old 10-26-2010, 05:26 PM   #19
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right now city ill get about 300km till fuel light 50/50 highway and city is about 400km. havnt done a 100% highway yet.
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Old 10-26-2010, 06:16 PM   #20
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Quote:
Originally Posted by dirtbiker348 View Post
he's saying you won't have the chance of it opening if you delete it. on any track car there is no way you r keeping it at wot the entire time. those times that your not at wot, it wont be recirculating exhaust gases, therefore reducing iat's
What he said.

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Originally Posted by arlenn View Post
I agree w/ that statement, but that is not what was written.
I'm not an English major, I sell paint for a living

But yeah thats what I meant, with the EGR you will get some hot gases back into the intake.
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