hows your gas mileage with no egr?
05-04-2005, 01:15 PM
#3
11 Second Club
I havn't heard or noticed that before. I'd just rip it (and AIR) out. I removed my air/egr just before getting my converter installed, and had speed turn the codes off during the "basic tune" for the converter. My gas mileage went down, but I think it was more converter than EGR. 
05-04-2005, 01:15 PM
#4
You have to change tuning to run without EGR. One reason so you won't throw codes. Even more important is because there's an EGR timing table that needs to be deleted with tuning as well. If you don't address the EGR tables, you could be subject to poorer fuel economy or pinging.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
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05-04-2005, 01:17 PM
#5
11 Second Club
Originally Posted by Patrick G
You have to change tuning to run without EGR. One reason so you won't throw codes. Even more important is because there's an EGR timing table that needs to be deleted with tuning as well. If you don't address the EGR tables, you could be subject to poorer fuel economy or pinging.
05-04-2005, 01:22 PM
#7
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I have removed both my AIR and EGR systems from 2000 Trans Am. I have never had the car tuned to have the codes or "tables" removed. The car runs great. My gas mileage is high as it was stock and I now have headers. If I stay out of the throttle, I can get 26-28 combined city/highway mpg. Also, I don't have sims on the rear O2 sensors so they are probably throwing a code too.
I got it dynoed last weekend and I hit 346 hp with mods in sig. The guys who dynoed it do a lot of LS1s and they said it had one of the best torque, hp, AND A/F curves they've ever seen on LS1, and they didn't believe me that it hadn't been tuned.
For me, removing the EGR and AIR have had no ill effects.
I got it dynoed last weekend and I hit 346 hp with mods in sig. The guys who dynoed it do a lot of LS1s and they said it had one of the best torque, hp, AND A/F curves they've ever seen on LS1, and they didn't believe me that it hadn't been tuned.
For me, removing the EGR and AIR have had no ill effects.
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05-04-2005, 03:45 PM
#11
Originally Posted by Tallon535
I have removed both my AIR and EGR systems from 2000 Trans Am. I have never had the car tuned to have the codes or "tables" removed. The car runs great. My gas mileage is high as it was stock and I now have headers. If I stay out of the throttle, I can get 26-28 combined city/highway mpg. Also, I don't have sims on the rear O2 sensors so they are probably throwing a code too.
I got it dynoed last weekend and I hit 346 hp with mods in sig. The guys who dynoed it do a lot of LS1s and they said it had one of the best torque, hp, AND A/F curves they've ever seen on LS1, and they didn't believe me that it hadn't been tuned.
For me, removing the EGR and AIR have had no ill effects.
I got it dynoed last weekend and I hit 346 hp with mods in sig. The guys who dynoed it do a lot of LS1s and they said it had one of the best torque, hp, AND A/F curves they've ever seen on LS1, and they didn't believe me that it hadn't been tuned.
For me, removing the EGR and AIR have had no ill effects.
05-04-2005, 04:04 PM
#12
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Originally Posted by amit
i hope i pass emissions. hahaha.
05-04-2005, 04:15 PM
#13
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What will happen when i remove my AIR from my car when i install my pacesetters? I've already had my car tuned. Will this throw a code and will i need to have my car tuned again?
05-04-2005, 04:24 PM
#14
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Originally Posted by cyphur_traq
you definitely WILL NOT pass emissions unless you tune out ALL the codes its throwing. you can only fail 1 or 2 tests, and !EGR/!AIR, added with !cats from headers, and you're gonna blow more than 2 tests. find someone w/HPT and see what they can do for ya.
Originally Posted by diamond01ss
What will happen when i remove my AIR from my car when i install my pacesetters? I've already had my car tuned. Will this throw a code and will i need to have my car tuned again?
05-04-2005, 04:58 PM
#15
Originally Posted by Patrick G
You have to change tuning to run without EGR. One reason so you won't throw codes. Even more important is because there's an EGR timing table that needs to be deleted with tuning as well. If you don't address the EGR tables, you could be subject to poorer fuel economy or pinging.
05-04-2005, 07:51 PM
#17
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Depends. Did you tell the tuner that you planned to remove AIR in the future? They wouldn't have any reason to turn the AIR codes off, or whatever they do, if you were running it at the time and iddn't say anything.
05-04-2005, 08:54 PM
#19
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Originally Posted by Patrick G
You have to change tuning to run without EGR. One reason so you won't throw codes. Even more important is because there's an EGR timing table that needs to be deleted with tuning as well. If you don't address the EGR tables, you could be subject to poorer fuel economy or pinging.
05-04-2005, 08:58 PM
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The egr system is only active during part throttle.Because the extra exhaust gases are diluting the air fuel mixture,extra timing is added as it will burn slightly slower.When you remove the egr system the air fuel mixture is no longer diluted and the extra timing is still there causing to much timing for the engine now and pinging.
