Knocklink
11 February 2006, 06:09 PM
#181
Scooby Regular
Originally Posted by Rannoch
Pete,
Have you ever seen a detonation trace from an ECU datalog?
Have you ever seen a detonation trace from an ECU datalog?
Originally Posted by Rannoch
Have you ever used an ECU that allows you to alter the fuel and ignition advance that enables you to see the detonation noise floor rise and fall?
As for the bollox about det floor rise and fall ....... don't be a wally
Originally Posted by Rannoch
Do you know how much detonation can occur before the engine has a critical failure?
Originally Posted by Rannoch
Have you ever taken an engine to bits and seen clear evidence of detonation on the pistons and yet the engine continues to run well?
The engines have ALWAYS been abused in some way!!
Originally Posted by Rannoch
Have you ever used 'det cans' to listen to the degree of knock in an engine and tune the level of boost, fueling and ignition to optimise power whilst minimising the impact of detonation?
do NOT insult me like that!! Det. Cans. my ****!!
Originally Posted by Rannoch
Did you actually know that you can actually have quite a lot of detonation before large components of your engine are left strewn at the roadside?
Why did you use the word actually so much??
-----------------------------------------------------
Subaru make top notch engines, they are not chocolate ......... they give up ONLY if they are driven and maintained by dicks (or *****!)
Hence the term COCKLINK!!
You only need gadgets like this to tell you that you are abusing your engine - just don't abuse it and then you don't need one!!
It the same as putting your hand into a furnace, you KNOW it might hurt because you are about to do something very idiotic, but - you attach a temperature gauge to your arm to tell you that your hand will melt if you keep it in the flames!!
POINTLESS!!!!!!
Pete
Last edited by pslewis; 11 February 2006 at 06:15 PM.
11 February 2006, 06:56 PM
#183
Scooby Regular
Strange thing to say??
I am voicing my opinion ........ so much Myth and Lies surround these cars that someone needs to steer the newbies through the **** Bollox ...
They can then have both sides of the coin and make a decision ..... allowing your hatred of me to cloud your judgement is your problem
Pete
I am voicing my opinion ........ so much Myth and Lies surround these cars that someone needs to steer the newbies through the **** Bollox ...
They can then have both sides of the coin and make a decision ..... allowing your hatred of me to cloud your judgement is your problem
Pete
12 February 2006, 01:28 AM
#184
Originally Posted by pslewis
Strange thing to say??
I am voicing my opinion ........ so much Myth and Lies surround these cars that someone needs to steer the newbies through the **** Bollox ...
They can then have both sides of the coin and make a decision ..... allowing your hatred of me to cloud your judgement is your problem
Pete
I am voicing my opinion ........ so much Myth and Lies surround these cars that someone needs to steer the newbies through the **** Bollox ...
They can then have both sides of the coin and make a decision ..... allowing your hatred of me to cloud your judgement is your problem
Pete
12 February 2006, 08:36 AM
#185
Scooby Regular
iTrader: (2)
Join Date: Apr 2004
Location: Somewhere in Kent, sniffing some V-Power
Posts: 15,029
Likes: 0
Received 0 Likes
on
0 Posts
How the hell is a knock-link, a myth?? 
Its a diagnostic tool, end of story. You either have one or you don't. Again, its called choice! 
And who are these tuners who hate knock links then Pete? Still hav'nt answered my question, have you? Oh, and Pete, I don't hate you, I just don't understand you!
Its a diagnostic tool, end of story. You either have one or you don't. Again, its called choice! And who are these tuners who hate knock links then Pete? Still hav'nt answered my question, have you? Oh, and Pete, I don't hate you, I just don't understand you!
12 February 2006, 09:33 AM
#186
Scooby Regular
iTrader: (1)
Join Date: Jan 1999
Location: UK
Posts: 15,271
Likes: 0
Received 0 Likes
on
0 Posts
Pete,
your ignorance as an engineer astounds me.
What is even more astounding is that you stand on your I am an expert high horse and have no clue what you are actually talking about.
This is coming from a man who claims to base his observations on empirical data who can't even calculate his mileage correctly.
You are of course entitled to your opinions - but for anyone who might read your posts - they are just opinion of someone who is rather narrow minded and naive
There are none as blind as those who will not see and none as deaf as those who will not listen.
You responded to my questions primarily with cant and abuse - I look forward to an 'engineering' response - not that I really expect to get one.
Oh, and pre-ignition or detonation - or are they synonymous for the same effect?
Oh, yes, and as Chris says - in your high horse moment you stated all these respected tuners who do not use any form of knock/pre-ignition/detonation warning. Who are they?
For everyone else - if you are getting your turbo engine (not just Subaru) of any kind tuned then PLEASE DO NOT USE ANY TUNER WHO DOES NOT USE SOME FORM OF DETONATION WARNING. They will either not be tuning your car to its maximum potential OR they will be negligent in leaving your car in a damaging state of tune that will eventually destroy the engine.
Rannoch
your ignorance as an engineer astounds me.
What is even more astounding is that you stand on your I am an expert high horse and have no clue what you are actually talking about.
This is coming from a man who claims to base his observations on empirical data who can't even calculate his mileage correctly.
You are of course entitled to your opinions - but for anyone who might read your posts - they are just opinion of someone who is rather narrow minded and naive
There are none as blind as those who will not see and none as deaf as those who will not listen.
You responded to my questions primarily with cant and abuse - I look forward to an 'engineering' response - not that I really expect to get one.
Oh, and pre-ignition or detonation - or are they synonymous for the same effect?
Oh, yes, and as Chris says - in your high horse moment you stated all these respected tuners who do not use any form of knock/pre-ignition/detonation warning. Who are they?
For everyone else - if you are getting your turbo engine (not just Subaru) of any kind tuned then PLEASE DO NOT USE ANY TUNER WHO DOES NOT USE SOME FORM OF DETONATION WARNING. They will either not be tuning your car to its maximum potential OR they will be negligent in leaving your car in a damaging state of tune that will eventually destroy the engine.
Rannoch
12 February 2006, 09:37 AM
#187
Scooby Regular
iTrader: (1)
Join Date: Jan 1999
Location: UK
Posts: 15,271
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Pete the Engineer
I may be weird, but, to me, the con rods and big ends bouncing on the tarmac behind me would kinda give me a slight indication that things weren't right!!
Originally Posted by Pete the Forgetful
By the way .... bits very rarely actually fly out of an engine!! actually
12 February 2006, 02:53 PM
#189
Former Sponsor
Join Date: Jul 2005
Location: Wellingborough, Northamptonshire
Posts: 2,859
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by pslewis
I don't need likkle lights to tell me my engine isn't running right - I WILL KNOW ITS NOT!
So, they are not a must have AND don't prevent engine damage??
I fail to see what use they have then, they may as well be connected to the stereo to give a DISCO Light Show!!
Pete
So, they are not a must have AND don't prevent engine damage??
I fail to see what use they have then, they may as well be connected to the stereo to give a DISCO Light Show!!
Pete
The ironic thing is, we actually discussed how potentially pointless the knocklink was on 03 wrx as the ECU does a very good job of keeping knock under control.
To assume that every subaru engine will keep on top of det is foolish. Failing fuel pumps, split inlet pipes, failing MAF sensors, stupid dump valves and of course owner "meddling" can all cause det or lean running that the ECU may well not compensate for. Failure isn't always the result of abuse.
Paul
12 February 2006, 07:36 PM
#190
Subaru Tuning Specialist
Join Date: Jun 2002
Location: 7.74 @179 mph 1/4 mile - road legal
Posts: 6,654
Likes: 0
Received 1 Like
on
1 Post
Interesting Paul, what was the cause of the failure ? Was this a standard car ?
On a similar note I had an Sti5 in recently that the owner just wanted "checked out" to ensure it was running sweet.
It was indeed running smooth and fast.....but.... the det cans revealed VERY heavy detonation at full throttle anything over 4000 rpm in any gear. The wideband revealed a very lean AFR of 13.0:1 at high load.
The ECU meanwhile was taking zero action, no knock retard whatsoever.
We didn't go very far at WOT ( 3secs ?) before I stopped the test as engine failure was inevitably seconds away.
In this case the car was standard with a decat exhaust. The reason for the dangerous running conditions turned out to be classic maf failure.
This guy was lucky, he found out before severe damage occurred. He wouldn't have needed to drive this car too hard to kill it whilst in this condition.
A knocklink however would have warned him.
I'd like to add that this particular type of maf failure is (normally) limited to Sti5/6 & P1 or tuned 99/00 UK's. Other years of car are far far less likely to have this particular issue and as such I wouldn't normally recommend a knocklink.
Andy
On a similar note I had an Sti5 in recently that the owner just wanted "checked out" to ensure it was running sweet.
It was indeed running smooth and fast.....but.... the det cans revealed VERY heavy detonation at full throttle anything over 4000 rpm in any gear. The wideband revealed a very lean AFR of 13.0:1 at high load.
The ECU meanwhile was taking zero action, no knock retard whatsoever.
We didn't go very far at WOT ( 3secs ?) before I stopped the test as engine failure was inevitably seconds away.
In this case the car was standard with a decat exhaust. The reason for the dangerous running conditions turned out to be classic maf failure.
This guy was lucky, he found out before severe damage occurred. He wouldn't have needed to drive this car too hard to kill it whilst in this condition.
A knocklink however would have warned him.
I'd like to add that this particular type of maf failure is (normally) limited to Sti5/6 & P1 or tuned 99/00 UK's. Other years of car are far far less likely to have this particular issue and as such I wouldn't normally recommend a knocklink.
Andy
12 February 2006, 07:44 PM
#191
Ecu Specialist
"You complete frigging idiot
The knock sensor does NOT listen at a TIMED sequence!!
It is listening steplessly, ie. all the time to all intents and purposes"
Load of b*ll*cks, the ecu will not react instantly, it has to hear the problem for a fixed (as in programmed into the ecu code) number of engine drive cycles (no not bikes Pete) before it does anything. That applies to ALL ecu's including yours David (Rannoch). And the interval settings are different for differing model years and models.
The ecu will only react under the above stated conditions within a span of rpm and engine load, outside that it does NOTHING, that includes rpms above 6000 rpm in most cases.
So the factory ecu is fast, it does react, trouble is ....
posted for the sake of accuracy and to correct misinformation not to participate. (yup we do have group buy on these at the moment)
cheers
bob
The knock sensor does NOT listen at a TIMED sequence!!
It is listening steplessly, ie. all the time to all intents and purposes"
Load of b*ll*cks, the ecu will not react instantly, it has to hear the problem for a fixed (as in programmed into the ecu code) number of engine drive cycles (no not bikes Pete) before it does anything. That applies to ALL ecu's including yours David (Rannoch). And the interval settings are different for differing model years and models.
The ecu will only react under the above stated conditions within a span of rpm and engine load, outside that it does NOTHING, that includes rpms above 6000 rpm in most cases.
So the factory ecu is fast, it does react, trouble is ....
posted for the sake of accuracy and to correct misinformation not to participate. (yup we do have group buy on these at the moment)
cheers
bob
12 February 2006, 08:44 PM
#193
Scooby Regular
Originally Posted by chrispurvis100
How the hell is a knock-link, a myth?? Its a diagnostic tool, end of story. You either have one or you don't. Again, its called choice!
And who are these tuners who hate knock links then Pete? Still hav'nt answered my question, have you? Oh, and Pete, I don't hate you, I just don't understand you!
Its a diagnostic tool, end of story. You either have one or you don't. Again, its called choice! And who are these tuners who hate knock links then Pete? Still hav'nt answered my question, have you? Oh, and Pete, I don't hate you, I just don't understand you!
THEN come back
Pete
12 February 2006, 08:56 PM
#195
Scooby Regular
Originally Posted by Zen Performance
A customer of mine has recently had a bg end failure of his 03 WRX. He was able to get forewarning of the problem as the onset of the failure started to give unusual knocklink activity.
Paul
Paul
Was it due to it picking up the 'knock' from the bearings?
Or, is what you are saying that the KnockLink detected some noise that 'may' have been det and you are somehow linking that to the Big End failure?
In the final analysis his Big Ends were shot .... so, really, the CockLink did nothing really, did it?
Pete
12 February 2006, 09:00 PM
#196
Scooby Regular
iTrader: (1)
Join Date: Apr 2005
Location: In the Flatlands of Lincolnshire
Posts: 2,892
Likes: 0
Received 0 Likes
on
0 Posts
Does pete have anything better to do? He seems to be making comments on most threads going especially if he can put somone down.
12 February 2006, 09:03 PM
#197
Originally Posted by pslewis
Interesting Paul, are you saying that the CockLink also has the ability to detect Big End failure? I would love to know what sensor it uses to do this, do you have any idea?
Was it due to it picking up the 'knock' from the bearings?
Or, is what you are saying that the KnockLink detected some noise that 'may' have been det and you are somehow linking that to the Big End failure?
In the final analysis his Big Ends were shot .... so, really, the CockLink did nothing really, did it?
Pete
Was it due to it picking up the 'knock' from the bearings?
Or, is what you are saying that the KnockLink detected some noise that 'may' have been det and you are somehow linking that to the Big End failure?
In the final analysis his Big Ends were shot .... so, really, the CockLink did nothing really, did it?
Pete
yhe only "big ends " you are intersted in pete reside in gay mens trousers
12 February 2006, 09:23 PM
#198
Scooby Regular
Originally Posted by Bob Rawle
Load of b*ll*cks, the ecu will not react instantly, it has to hear the problem for a fixed (as in programmed into the ecu code) number of engine drive cycles (no not bikes Pete) before it does anything. That applies to ALL ecu's including yours David (Rannoch). And the interval settings are different for differing model years and models.
The ecu will only react under the above stated conditions within a span of rpm and engine load, outside that it does NOTHING, that includes rpms above 6000 rpm in most cases.
So the factory ecu is fast, it does react, trouble is ....
bob
The ecu will only react under the above stated conditions within a span of rpm and engine load, outside that it does NOTHING, that includes rpms above 6000 rpm in most cases.
So the factory ecu is fast, it does react, trouble is ....
bob
Now, are we talking nano-seconds? Or are we talking minutes?
Nano-seconds I can live with ..... if you are suggesting minutes than I suggest you get your GCSE Electronic Books out again and have a revision!
Quote:-
"The ECU is 'always' tracking the engine's sensors and actuators. Resetting the ECU does not cause the ECU to learn engine changes any faster. The ECU is 'always' tracking the gradual changes in the engine sensors and actuators. The ECU 'never' gets satisfied with a setting, and is 'always' updating the trim values. It will discover whatever change you made to your engine and make the appropriate changes. In fact, unplugging the ECU will most likely increase the learning curve of the new part"
Taken from:- http://www.tmo.com/theory/myth/ecureset.htm
Note the word 'Always' now I take that to mean nano or mili seconds ... Bob clearly thinks it makes your tea before adjusting the Ignition Timing when knock is detected.
Pete
Last edited by pslewis; 13 February 2006 at 12:09 AM.
12 February 2006, 09:25 PM
#199
Scooby Regular
Originally Posted by 360ste
Does pete have anything better to do? He seems to be making comments on most threads going especially if he can put somone down.
You make the claim - give the figures .... or be shown as what you are!
I will assume that if you do not supply the above - you have apologised for such a stupid statement!
pete
12 February 2006, 09:25 PM
#200
Scooby Regular
LOL cracking thread, and I only read the first and last pages of it!
Disregarding the issue of whether it should be Knocklink or Cocklink, the more important issue is why the Subaru ECU is so feeble that it can't avoid a bit of a tinkle when a component fails e.g. a knackered fuel pump. Now I'm no auto engineer (although I once was an electronics engineer) but to me it seems pretty obvious...The problem we're talking about can be caused by a number of factors, but chiefly, too much heat/pressure in the cylinders, lean AFR and low octane fuel. So if any of these events happen - which are all detectable by the ECU because it has sensors to log EXACTLY those things - why doesn't the ECU say enough's enough and cut the spark? End of problem.
In a modern car you expect that should be able to drive it like you want and rely on the ECU to handle safety margins itself. If I'm flooring it at 110mph and because of a crappy design flaw in the bonnet scoop I'm not getting flow through the IC, leading to rocketing charge temps, I won't cry about it if the ECU decides to cut the spark and spoil my fun and stop me destroying my engine!
If I get a 'bad batch' of fuel which hasn't got the knock resistance expected, it's not too much to ask for the ECU to find that it can't advance the ignition as much as before and just pull the timing until the fuel improves?
I can see arguments for and against Knocklinks, but what I cannot accept is that any number of common ancillary faults seem to either wreck Subaru engines because of inadequate ECU control and non-failsafe design. It's just shoddy workmanship IMHO. The driver of a standard or mildly tuned modern road car should NOT need to know anything about knock, or have to monitor it. If it's been highly tuned then OK, a knocklink is a handy thing just like I used to have to watch oil pressure, oil temp, AFR, nitrous pressure, coolant temp, two channels of charge temp etc - but that was when quarter miling and I'd be sitting in the staging lanes for God knows how long before making the pass. And I didn't even have a knocklink. My 'Knocklink' was my ears! If I was flooring it, at high speed, on a hot day, right in the middle of the power band and I suddenly heard a lovely little tinkling noise from the engine, guess what? That means let off the accelerator! IMHO
Disregarding the issue of whether it should be Knocklink or Cocklink, the more important issue is why the Subaru ECU is so feeble that it can't avoid a bit of a tinkle when a component fails e.g. a knackered fuel pump. Now I'm no auto engineer (although I once was an electronics engineer) but to me it seems pretty obvious...The problem we're talking about can be caused by a number of factors, but chiefly, too much heat/pressure in the cylinders, lean AFR and low octane fuel. So if any of these events happen - which are all detectable by the ECU because it has sensors to log EXACTLY those things - why doesn't the ECU say enough's enough and cut the spark? End of problem.
In a modern car you expect that should be able to drive it like you want and rely on the ECU to handle safety margins itself. If I'm flooring it at 110mph and because of a crappy design flaw in the bonnet scoop I'm not getting flow through the IC, leading to rocketing charge temps, I won't cry about it if the ECU decides to cut the spark and spoil my fun and stop me destroying my engine!
If I get a 'bad batch' of fuel which hasn't got the knock resistance expected, it's not too much to ask for the ECU to find that it can't advance the ignition as much as before and just pull the timing until the fuel improves?
I can see arguments for and against Knocklinks, but what I cannot accept is that any number of common ancillary faults seem to either wreck Subaru engines because of inadequate ECU control and non-failsafe design. It's just shoddy workmanship IMHO. The driver of a standard or mildly tuned modern road car should NOT need to know anything about knock, or have to monitor it. If it's been highly tuned then OK, a knocklink is a handy thing just like I used to have to watch oil pressure, oil temp, AFR, nitrous pressure, coolant temp, two channels of charge temp etc - but that was when quarter miling and I'd be sitting in the staging lanes for God knows how long before making the pass. And I didn't even have a knocklink. My 'Knocklink' was my ears! If I was flooring it, at high speed, on a hot day, right in the middle of the power band and I suddenly heard a lovely little tinkling noise from the engine, guess what? That means let off the accelerator! IMHO
12 February 2006, 09:27 PM
#201
Scooby Regular
Originally Posted by kingofturds
yhe only "big ends " you are intersted in pete reside in gay mens trousers
I notice that you have said ABSOLUTELY NOTHING on this thread about CockLinks and their uses and what Technical opinion you have
Pete
12 February 2006, 09:31 PM
#202
Scooby Regular
Originally Posted by silent running
LOL cracking thread, and I only read the first and last pages of it!
Disregarding the issue of whether it should be Knocklink or Cocklink, the more important issue is why the Subaru ECU is so feeble that it can't avoid a bit of a tinkle when a component fails e.g. a knackered fuel pump. Now I'm no auto engineer (although I once was an electronics engineer) but to me it seems pretty obvious...The problem we're talking about can be caused by a number of factors, but chiefly, too much heat/pressure in the cylinders, lean AFR and low octane fuel. So if any of these events happen - which are all detectable by the ECU because it has sensors to log EXACTLY those things - why doesn't the ECU say enough's enough and cut the spark? End of problem.
In a modern car you expect that should be able to drive it like you want and rely on the ECU to handle safety margins itself. If I'm flooring it at 110mph and because of a crappy design flaw in the bonnet scoop I'm not getting flow through the IC, leading to rocketing charge temps, I won't cry about it if the ECU decides to cut the spark and spoil my fun and stop me destroying my engine!
If I get a 'bad batch' of fuel which hasn't got the knock resistance expected, it's not too much to ask for the ECU to find that it can't advance the ignition as much as before and just pull the timing until the fuel improves?
I can see arguments for and against Knocklinks, but what I cannot accept is that any number of common ancillary faults seem to either wreck Subaru engines because of inadequate ECU control and non-failsafe design. It's just shoddy workmanship IMHO. The driver of a standard or mildly tuned modern road car should NOT need to know anything about knock, or have to monitor it. If it's been highly tuned then OK, a knocklink is a handy thing just like I used to have to watch oil pressure, oil temp, AFR, nitrous pressure, coolant temp, two channels of charge temp etc - but that was when quarter miling and I'd be sitting in the staging lanes for God knows how long before making the pass. And I didn't even have a knocklink. My 'Knocklink' was my ears! If I was flooring it, at high speed, on a hot day, right in the middle of the power band and I suddenly heard a lovely little tinkling noise from the engine, guess what? That means let off the accelerator! IMHO
Disregarding the issue of whether it should be Knocklink or Cocklink, the more important issue is why the Subaru ECU is so feeble that it can't avoid a bit of a tinkle when a component fails e.g. a knackered fuel pump. Now I'm no auto engineer (although I once was an electronics engineer) but to me it seems pretty obvious...The problem we're talking about can be caused by a number of factors, but chiefly, too much heat/pressure in the cylinders, lean AFR and low octane fuel. So if any of these events happen - which are all detectable by the ECU because it has sensors to log EXACTLY those things - why doesn't the ECU say enough's enough and cut the spark? End of problem.
In a modern car you expect that should be able to drive it like you want and rely on the ECU to handle safety margins itself. If I'm flooring it at 110mph and because of a crappy design flaw in the bonnet scoop I'm not getting flow through the IC, leading to rocketing charge temps, I won't cry about it if the ECU decides to cut the spark and spoil my fun and stop me destroying my engine!
If I get a 'bad batch' of fuel which hasn't got the knock resistance expected, it's not too much to ask for the ECU to find that it can't advance the ignition as much as before and just pull the timing until the fuel improves?
I can see arguments for and against Knocklinks, but what I cannot accept is that any number of common ancillary faults seem to either wreck Subaru engines because of inadequate ECU control and non-failsafe design. It's just shoddy workmanship IMHO. The driver of a standard or mildly tuned modern road car should NOT need to know anything about knock, or have to monitor it. If it's been highly tuned then OK, a knocklink is a handy thing just like I used to have to watch oil pressure, oil temp, AFR, nitrous pressure, coolant temp, two channels of charge temp etc - but that was when quarter miling and I'd be sitting in the staging lanes for God knows how long before making the pass. And I didn't even have a knocklink. My 'Knocklink' was my ears! If I was flooring it, at high speed, on a hot day, right in the middle of the power band and I suddenly heard a lovely little tinkling noise from the engine, guess what? That means let off the accelerator! IMHO
)My ears do my listening for pinking ........ same as yours, trouble is - these likkle kiddies have their music up so loud - their whooooosing Dump Valves, saying look out dick coming through - and their drainpipe exhausts that they couldn't hear the cylinder head bang the underside of the bonnet.
My ECU does the adjusting ...... but, according to Bob, that can take an age!!
laughable!! I will choose to believe that it acts within mili-seconds ... thanks all the same CockLinks are for Chavs .......... same as Dump Valves and Gold Wheels!!
Pete
Last edited by pslewis; 12 February 2006 at 09:34 PM.
12 February 2006, 09:33 PM
#203
Originally Posted by pslewis
Just the 'quality' statement we have come to expect from you
I notice that you have said ABSOLUTELY NOTHING on this thread about CockLinks and their uses and what Technical opinion you have
Pete
I notice that you have said ABSOLUTELY NOTHING on this thread about CockLinks and their uses and what Technical opinion you have
Pete
12 February 2006, 09:38 PM
#205
Scooby Regular
Originally Posted by kingofturds
nik the dick?
Pete
12 February 2006, 10:03 PM
#207
Scooby Regular
Originally Posted by waggy doo
Nowt wrong with gold wheels
Wrong thread mate ............... you are looking for the 'I'm Gay' thread
Pete
12 February 2006, 10:06 PM
#208
Former Sponsor
Join Date: Jul 2005
Location: Wellingborough, Northamptonshire
Posts: 2,859
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by pslewis
Interesting Paul, are you saying that the CockLink also has the ability to detect Big End failure? I would love to know what sensor it uses to do this, do you have any idea?
Was it due to it picking up the 'knock' from the bearings?
Or, is what you are saying that the KnockLink detected some noise that 'may' have been det and you are somehow linking that to the Big End failure?
In the final analysis his Big Ends were shot .... so, really, the CockLink did nothing really, did it?
Pete
Was it due to it picking up the 'knock' from the bearings?
Or, is what you are saying that the KnockLink detected some noise that 'may' have been det and you are somehow linking that to the Big End failure?
In the final analysis his Big Ends were shot .... so, really, the CockLink did nothing really, did it?
Pete
Originally Posted by silent running
Disregarding the issue of whether it should be Knocklink or Cocklink, the more important issue is why the Subaru ECU is so feeble that it can't avoid a bit of a tinkle when a component fails e.g. a knackered fuel pump. Now I'm no auto engineer (although I once was an electronics engineer) but to me it seems pretty obvious...The problem we're talking about can be caused by a number of factors, but chiefly, too much heat/pressure in the cylinders, lean AFR and low octane fuel. So if any of these events happen - which are all detectable by the ECU because it has sensors to log EXACTLY those things - why doesn't the ECU say enough's enough and cut the spark? End of problem.
12 February 2006, 10:19 PM
#209
Scooby Regular
Originally Posted by Zen Performance
A knocklink is quite crude, it's just a knock sensor, very much like the OE one, a filter and a little christmas tree of LEDS. In the case of a big end failure, it will pickup the mechanical noise that resonates through the block. If you have a gradual failure, then it will pickup the additional noise in a lot of cases. In this case, the car in question was able to still be driven to the dealers for the warranty repair, if it was thrashed in ignorance of the failure, it would have suffered rather worse.
Now, call me old fashioned (and I know I am!) but I can hear the Big Ends knocking, if they are, .......... what you are saying is that a CockLink would pick up that noise before it can be heard by ear??
In that case, the Subaru Knock Sensor would hear it too ...... and retard the ignition timing, needlessly.
This has really intrigued me now, the CockLinks ability to spot imminent mechanical failures before the owner even knows about them ........ how did you diagnose Big End failure if the only warning was the CockLink lights??
Pete
