Timing advancing, while knock counts rise
#1
Former Sponsor
Thread Starter
iTrader: (15)
Join Date: Aug 2004
Location: Denver, Colorado
Posts: 379
Likes: 0
Received 0 Likes
on
0 Posts
Timing advancing, while knock counts rise
My Friend bought a used 03 evo, on its first 3 gear pull I logged with Mitsulogger, we got counts as high a 17. Around 4000 it knocks up to around 12 counts and starts to pull timing, then after 6000 it still shows lots of knock and yet, timing is advancing now. Can anybody explain this. I will be working on this car for the next couple hours. Going to make sure everything looks good with the plugs, fuel injectors, and everything under the hood, then do another pull to see were we are today.
#3
Account Disabled
iTrader: (38)
Join Date: Aug 2005
Location: Virginia Beach, Virginia
Posts: 9,319
Likes: 0
Received 1 Like
on
1 Post
My Friend bought a used 03 evo, on its first 3 gear pull I logged with Mitsulogger, we got counts as high a 17. Around 4000 it knocks up to around 12 counts and starts to pull timing, then after 6000 it still shows lots of knock and yet, timing is advancing now. Can anybody explain this. I will be working on this car for the next couple hours. Going to make sure everything looks good with the plugs, fuel injectors, and everything under the hood, then do another pull to see were we are today.
post the log please, also, does the high octane map match the low?
#4
Evolved Member
iTrader: (2)
Like John said, you'll still get advancing timing with knock. You just won't get to your set timing advance as dictated in the maps.
Your timing will be pulled about 1* for every 3 counts. So if you are getting 17 counts of knock, the ECU is pulling roughly 6 degrees from what you map says in that RPM/load cell.
The timing will still advance, though. The knock retard is just a correction factor due to the knock counts.
Eric
Your timing will be pulled about 1* for every 3 counts. So if you are getting 17 counts of knock, the ECU is pulling roughly 6 degrees from what you map says in that RPM/load cell.
The timing will still advance, though. The knock retard is just a correction factor due to the knock counts.
Eric
Thread
Thread Starter
Forum
Replies
Last Post
BigEvo908
General Engine Management / Tuning Forum
19
Apr 10, 2017 10:16 AM
blk-majik
Evo X Engine Management / Tuning Forums
23
Aug 16, 2012 04:20 PM
Akron MR
General Engine Management / Tuning Forum
5
Oct 10, 2010 10:44 PM