Blocks :)
MBWorld Fanatic!
Joined: Apr 2009
Posts: 1,258
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E55
When knock occurs, the cylinder temp go up, which also reduces the threashold for knock, making it more likely to occur again. So, even though the ECU might be pulling timing it might not be puling timing quick enough to get the knock under control.
MBWorld Fanatic!
Joined: Jun 2010
Posts: 4,173
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From: Puerto Rico
2005 E55 AMG
Ok, so let me get this straight, you use to examine pistons from racing engines, and you came up with "friction heat related piston failure" after seeing this piston with the hole in the side of it?
Well that would definitely explain why you had a box full of them to examine.
Ok, carry on. Thanks for playing along with me.
Well that would definitely explain why you had a box full of them to examine.
Ok, carry on. Thanks for playing along with me.
MBWorld Fanatic!
Joined: Jun 2010
Posts: 4,173
Likes: 7
From: Puerto Rico
2005 E55 AMG
Knock sensors are a reactive system, in that, first you have to experience knock for them to work, and here within is the problem.
When knock occurs, the cylinder temp go up, which also reduces the threashold for knock, making it more likely to occur again. So, even though the ECU might be pulling timing it might not be puling timing quick enough to get the knock under control.
When knock occurs, the cylinder temp go up, which also reduces the threashold for knock, making it more likely to occur again. So, even though the ECU might be pulling timing it might not be puling timing quick enough to get the knock under control.
Super Member
Joined: Apr 2009
Posts: 837
Likes: 1
From: Tacoma WA
Bicycle
Problem with most here is that 8 out of 10 guys "DO NOT" Wideband their cars and just go by what power they made at the the dyno and what that sniffer (AFR reader) tells them in that particular dyno day..Every tuner IMO should recommend these data logging devices and include a little educating about all these numbers before anything.
Ive been preaching this for a long time, You consider the cost of an engine vs the cost of a wideband,
You add 100 hp to a stock engine and just assume everthing is going to be fine, or better yet when it does break we just blame the tuners for giving us what we wanted
MBWorld Fanatic!
Joined: Apr 2009
Posts: 1,258
Likes: 5
E55
I feel we strayed far enough off topic already, but I would like to share this one thought. You post quite often on this forum and sometimes they are informative, while others are completely off base. It's ok if you do not know the answer, we are all learning as we go along.
My apologies to the community for going off topic.
Peace.
MBWorld Fanatic!
Joined: Dec 2007
Posts: 1,461
Likes: 9
From: Treasure Island, FL
GLE 63S
Problem with most here is that 8 out of 10 guys "DO NOT" Wideband their cars and just go by what power they made at the the dyno and what that sniffer (AFR reader) tells them in that particular dyno day..Every tuner IMO should recommend these data logging devices and include a little educating about all these numbers before anything.
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,124
Likes: 32
From: Florida-Germany-New York
2004 E55,1969 300SEL6.3,2011 ML350 BlueTec Diesel,2005 ML400 CDI
