EGR removal
10-26-2003, 02:22 PM
#2
There are some pretty major timing map differences between EGR and non EGR cars. I had to slash timing in the low and high load cells between 400-3000+rpm. You'll probably experience some pretty serious kr if you don't remap the ignition timing.
Good luck,
Richard
Good luck,
Richard
10-26-2003, 08:56 PM
#4
FormerVendor
iTrader: (1)
Join Date: Feb 2002
Location: Waldorf, MD
Posts: 3,059
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Richard@WCCH
There are some pretty major timing map differences between EGR and non EGR cars. I had to slash timing in the low and high load cells between 400-3000+rpm. You'll probably experience some pretty serious kr if you don't remap the ignition timing.
Good luck,
Richard
Good luck,
Richard
What values do you suggest using. Should the 01-02 timing map be used for EGR vehcles that have it deleted
10-26-2003, 08:59 PM
#5
TECH Addict
Join Date: Nov 2001
Location: TEXAS
Posts: 2,593
Likes: 0
Received 0 Likes
on
0 Posts
I removed my EGR on my 98 and it took away all the knock retard I had been getting. It was one of the best mods I've done lately. I have even added 2 degrees of timing and still no KR. I think it may depend on the car on how the results are going to come out. It should allow more clean air into the cylinder, instead of used exausht, so it should help more than it will hinder.
10-27-2003, 08:44 AM
#6
FormerVendor
iTrader: (1)
Join Date: Feb 2002
Location: Waldorf, MD
Posts: 3,059
Likes: 0
Received 0 Likes
on
0 Posts
That seems odd. If the purpose of the EGR is to kill some of the intake charge why would removing it make i difference in KR. If anything removing it should make the vehicle detonate a little more because the timming would then be to aggresive for the extra air and fuel entering the engine via the "cleaner" charge.
10-27-2003, 08:59 AM
#7
Humpin: Your on the right track. The recirculated exhaust gases squash detonation by actually cooling the combustion charge. Of course this only occurs during part throttle operation. Using the timing values from the '01&'02 cars is a good start. You may find that you can increase or decrease a few degrees from those values.
Good luck,
Richard
Good luck,
Richard
Trending Topics
10-27-2003, 11:11 AM
#8
TECH Resident
Join Date: Nov 2002
Posts: 996
Likes: 0
Received 0 Likes
on
0 Posts
I did not remove my EGR until I put a different cam in. I have a 2000 and I actually added MORE timing (31 degrees at WOT). and I still get no knock.
With a stock cam you may have to change the timing tables a bit, but I do not know for sure. I think the more overlap the cam has the less need for an EGR system, but I might be way off on this...
Tommy
With a stock cam you may have to change the timing tables a bit, but I do not know for sure. I think the more overlap the cam has the less need for an EGR system, but I might be way off on this...
Tommy
10-27-2003, 12:59 PM
#9
TECH Addict
Join Date: Nov 2001
Location: TEXAS
Posts: 2,593
Likes: 0
Received 0 Likes
on
0 Posts
I thought it was weird that it worked that way, but it did. I put the LS6 intake and LS6 PCV Valley setup at the same time that I scrapped EGR and AIR. Before that, I had the infamous 98 3.9* of KR, after I had 0* plus I upped timing by 2*.
