Page 1 of 1
Getting bad knock
Posted: Mon Sep 21, 2009 9:14 pm
by Pir8pete
I'm getting bad knock when I let off the gas at about half throttle, I can hear it, here are some logs.
Hondata could you tell me what I need to change, I'm thinking it's the timing.
http://rapidshare.com/files/283297662/0 ... 1.zip.html
http://rapidshare.com/files/283297796/0 ... 2.zip.html
logs are from Civic-Si-Race-7-CT-SC-Stage2.fpcal
Posted: Tue Sep 22, 2009 7:29 am
by Hondata
How are you determining that there is knock? The first datalog does not show any at all.
Posted: Wed Sep 23, 2009 3:05 pm
by Pir8pete
Posted: Thu Sep 24, 2009 8:03 am
by Hondata
I looked at another datalog and it only had 1 knock count in 10 minutes.
Again: How are you determining that there is knock?
Posted: Sat Sep 26, 2009 1:38 pm
by Pir8pete
Hondata wrote:I looked at another datalog and it only had 1 knock count in 10 minutes.
Again: How are you determining that there is knock?
I can hear it when I let off the gas, tick tick tick, and my knock goes up right away, only half to full throttle
Posted: Mon Sep 28, 2009 8:53 am
by Hondata
Can you give me a specific time in a datalog where you see knock? I only see a knock count of 1 over several minutes, and think you are confusing knock level or knock retard with knock count.
Posted: Mon Sep 28, 2009 4:35 pm
by Pir8pete
I have done some fuel mods to the table and this morning it was ok i got afew knocks, then on the way home i was kinda high mostly on cyl.2 under light throttle
I'm looking at knock counts and the counts for the indavidual cyls.
http://rapidshare.com/files/286255947/m ... .fpdl.html
http://rapidshare.com/files/286256477/d ... .fpdl.html
I can hear the ping ping ping
I beleave i need to pull just abit more timing on the ignition, i haven't touch this yet.
Posted: Tue Sep 29, 2009 5:25 am
by Pir8pete
@hondata
So in theory if my fuel table is running fine, but i'm still getting knock then I'll need to pull more timing then just what your base map has, correct? How much timing will I need to pull back? as I don't have a dyno or have any around till I road tip it out of town. I'm trying to road tune it so I'm save for putting around town till I can get to a dyno.
HERE WHAT I HAVE DONE SO FAR;
I'm using your base map of the ct-e supercharger stage 2. I have dropped my pulley to a 3 inch, thats about a pound and a half more boost. My fuel still needs maybe a afew very small tweeks, i mean very small. it's close to bang on. I disabled the secondary O2 sensor and used a wideband when checking/editing my fuel going down the road.
Posted: Tue Sep 29, 2009 9:29 am
by Spunkster
Knock is more from igintion the fuel. Adjustments to try and eliminate knock should be made to ignition not fuel.