cobb ap knock retard ? - evolutionm.net

Go Back   >
Log In 


Evo X Engine Management / Tuning Forums Discuss the major engine management systems.

cobb ap knock retard ?

Reply
 
 
 
Thread Tools Search this Thread
Old Feb 18, 2010, 01:09 AM   #1
Newbie
Thread Starter
 
chewyobaca's Avatar
 
Join Date: Jul 2009
Location: vegas
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: Evo X gsr

cobb ap knock retard ?

ok noob here......I just got a cobb ap and fired up stage 2. Well I went into live logging and went into "knock retard" and I'm getting a reading up to 2.4 at low rpms, but I did a few WOT and got one reading up to 1.8 and seeing a few pulls over 1.1......how bad is this and what can I do to fix issue? What else should I be looking for in my cobb ap live data logging?
Offline
 
Reply With Quote
Old Feb 18, 2010, 07:14 AM   #2
Evolving Member
iTrader: (3)
 
Whitewind's Avatar
 
Join Date: Jul 2009
Location: Gillette Wyoming
Posts: 191
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: Evo x

Ouch! Thats a lot of knock! 1.0=3 counts so yeah man knocking bad. Do you have a WB installed? and have ATR?
Offline
 
Reply With Quote
Old Feb 18, 2010, 08:38 AM   #3
Newbie
Thread Starter
 
chewyobaca's Avatar
 
Join Date: Jul 2009
Location: vegas
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: Evo X gsr

no wb or atr, I need to get that stuff soon. I thought I could run stage 2 with no big issues. Dang, well what can I do to make knock go away? I got 50/50 mix of 100 octane and 91 and that didn't seem to help much. I guess I'll go back to stage 1
Offline
 
Reply With Quote
Old Feb 18, 2010, 09:12 AM   #4
EvoM Guru
iTrader: (1)
 
Golden's Avatar
 
Join Date: Nov 2009
Location: Omaha, NE
Posts: 1,456
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 2010 Evo GSR Black

Formula is

Cobb number / .35 = knock count.
Offline
 
Reply With Quote
Old Feb 18, 2010, 09:26 AM   #5
Newbie
Thread Starter
 
chewyobaca's Avatar
 
Join Date: Jul 2009
Location: vegas
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: Evo X gsr

?? Cobbs number?? I called them and some guy on the phone didn't know anything and told me to go get it tuned.....lol that why I got the ap....but I guess you still have to pay for a tune, should of skipped this ap and just got a tune, what good is it tohave if you got to get TUNED still.....I can't believe this, is anyone else having lots of knock retard using ap stage 2 and if so WTF did you do to make it stp
Offline
 
Reply With Quote
Old Feb 18, 2010, 09:45 AM   #6
Evolving Member
iTrader: (2)
 
Join Date: Mar 2009
Location: Colorado
Posts: 182
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 08 Evo X MR

Switch to the AZ 91 octane stage 2 map. If that still doesn't work.. sorry to say but it's either use Stage 1 91 and fall back to stage 1 AZ 91, or get a pro tune.
Offline
 
Reply With Quote
Old Feb 18, 2010, 11:35 AM   #7
Evolving Member
iTrader: (3)
 
Whitewind's Avatar
 
Join Date: Jul 2009
Location: Gillette Wyoming
Posts: 191
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: Evo x

Well if you don't know what your AFRs are I would check Fuel pump relay. Might be going bad. Could be to lean, bad gas, timing all kind of stuff. But I would change your fuel pump relay with headlight think it is and re-log. Find thread on here or look in your manual and see what one is the FP relay.

Also what year?
Offline
 
Reply With Quote
Old Feb 18, 2010, 12:28 PM   #8
EvoM Guru
iTrader: (1)
 
Golden's Avatar
 
Join Date: Nov 2009
Location: Omaha, NE
Posts: 1,456
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 2010 Evo GSR Black

Sorry...

Formula is

Knock Retard (CA) / .35 = knock count

examples:
.35 = 1 knock count
1.05 = 3 knock count
2.46 = 7 knock count
12.66 = 36 knock count (I sure hope you don't see this one lol)
Offline
 
Reply With Quote
Old Feb 18, 2010, 02:55 PM   #9
Evolving Member
iTrader: (2)
 
Join Date: Mar 2009
Location: Colorado
Posts: 182
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 08 Evo X MR

Quote:
Originally Posted by Golden View Post
Sorry...

Formula is

Knock Retard (CA) / .35 = knock count

examples:
.35 = 1 knock count
1.05 = 3 knock count
2.46 = 7 knock count
12.66 = 36 knock count (I sure hope you don't see this one lol)
12.66 would sound like a Jamaican in your engine bay playing some steel drums.
Offline
 
Reply With Quote
Old Feb 18, 2010, 03:22 PM   #10
Evolving Member
 
Hassan!'s Avatar
 
Join Date: Apr 2009
Location: Canada
Posts: 379
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 2008 Evo X GSR

Question

Quote:
Originally Posted by Golden View Post
Sorry...

Formula is

Knock Retard (CA) / .35 = knock count

examples:
.35 = 1 knock count
1.05 = 3 knock count
2.46 = 7 knock count
12.66 = 36 knock count (I sure hope you don't see this one lol)
So i was getting .9 at the red line, Is it bad? ( I have over boost map from Cobb )
Thanks for sharing.
Offline
 
Reply With Quote
Old Feb 18, 2010, 03:25 PM   #11
Evolving Member
iTrader: (3)
 
Whitewind's Avatar
 
Join Date: Jul 2009
Location: Gillette Wyoming
Posts: 191
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: Evo x

If its all time yes! If its sometimes there and sometimes not then no.
Offline
 
Reply With Quote
Old Feb 18, 2010, 03:31 PM   #12
Evolving Member
iTrader: (9)
 
Join Date: Sep 2006
Location: California
Posts: 390
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 2010 Gray Evo X

so whats an acceptable range of knock?

0.35 to 1.05 is fine for the most part? anything above that, you should look into diagnosis?
Offline
 
Reply With Quote
Old Feb 18, 2010, 03:37 PM   #13
Evolving Member
iTrader: (3)
 
Whitewind's Avatar
 
Join Date: Jul 2009
Location: Gillette Wyoming
Posts: 191
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: Evo x

But if its at same rpm area and starts to knock .35 or whatever there is a problem in that area with timing or whatever. Lets say everytime you do a pull in 3rd or 4th and at 4500rpm you start seeing knock everytime there is a problem. Now if you do 3-4 pulls and 1 pull out of them there is knock at that rpm area your fine.
Offline
 
Reply With Quote
Old Feb 18, 2010, 03:43 PM   #14
Evolving Member
 
Join Date: May 2009
Location: NC
Posts: 230
Thanks: 0
Thanked 0 Times in 0 Posts
def. check that relay first.
Offline
 
Reply With Quote
Old Feb 18, 2010, 07:40 PM   #15
EvoM Guru
iTrader: (1)
 
Golden's Avatar
 
Join Date: Nov 2009
Location: Omaha, NE
Posts: 1,456
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 2010 Evo GSR Black

Cobb says that 1.05 and less is normal as long as its random. Some say its almost impossible to tune them all out.
Offline
 
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Cobb AP different #'s than AEM gauge evo10fanatic33 Evo X Engine Management / Tuning Forums 4 Dec 14, 2014 04:58 AM
Cobb AP different numbers than AEM boost gauge..why? evo10fanatic33 Cobb AccessPORT 1 Nov 19, 2014 10:06 AM
Got 1 knock count on Cobb Ap GsrJake Cobb AccessPORT 13 Apr 7, 2013 12:24 PM
Hard knock at start and soft through the gears. oftheheavens Evo X Engine Management / Tuning Forums 5 Oct 16, 2010 04:04 PM
Knock Retard Amount Question? Clipse3GT Evo X Engine Management / Tuning Forums 15 Feb 1, 2010 09:29 PM


Tags
035, ap, bad, cobb, count, counts, engine, ets, evo, intake, knock, logging, lot, pull, retard

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off



All times are GMT -7. The time now is 06:54 PM.