Yep....the noise is detonation.

 

So i've knocked the car back down to safety boost and am now on a fault finding mission.

 

i'm firstly changing large boost pipes for new ones as mine are knackered, re checking the installation of my EBC pipes etc, changing the spark plugs, moving a pressure sensor T Piece from next to the fuel regultor (oops) to further down the line.

 

Im going to flush the coolant and clean the rad as the car runs very hot

 

Will then be into looking at fueling after that. Any other inside info anyone can give me the heads up on ??

 

I have popped the car on a conzult (thanks Topless!!!!!) and all is fine with the engine sensors etc.

Too much fuel can cause premature engine failure also. Washing the bores with fuel, new engine time.

Too much fuel can cause premature engine failure also. Washing the bores with fuel, new engine time.

Yes, I am familiar with bore wash. but this is not a problem that destroys engines in minutes, it takes a little longer than that.

 

let me put it this way - would you prefer to be able to drive home on a rich mixture or have your engine blow up because it hasn't got a knock map?

Well the knock maps are IDENTICAL to the main maps above 4800rpm and even below that at relatively low load. If you used a stock knock map on a tuned ECU then chances are it would actually LEAN OUT if it went into them....

Well the knock maps are IDENTICAL to the main maps above 4800rpm and even below that at relatively low load. If you used a stock knock map on a tuned ECU then chances are it would actually LEAN OUT if it went into them....

 

Ahhhh! now I know what you are getting at!

 

You are saying that leaving a stock knock map in place could be dangerous! That does make sense.

 

What I was trying to get at is, if you have the knowledge/tools to write your own maps, why would you not modify the knock map as well?

 

I know it is possible as JD does this on his chips.

 

Why SE did not have a knock map is beyond me...

All JD will do is leave the stock knock maps in there. If you're running boost jets then there is plenty of reason to have the knock maps - you will still get safety boost if it detects det. If you're running an EBC, safety boost function is lost so without the drop in boost it could make the maps dangerous...

All JD will do is leave the stock knock maps in there. If you're running boost jets then there is plenty of reason to have the knock maps - you will still get safety boost if it detects det. If you're running an EBC, safety boost function is lost so without the drop in boost it could make the maps dangerous...

 

JD does change the knock maps, making them richer and I think he retards the timing too.

 

When running an EBC and det is detected the boost will not drop but the ECU still switchs to the knock map, which if it has been tweaked as I mentioned will make it safer.

Yep fair enough if he does.

 

Remember though that the det sensor only works up to 3k rpm then the ECU stops listening. To get det this low you would have to have some pretty bad fuel/fueling problem. If this was the case you REALLY don't want to be running high boost no matter what maps your in lol. I think Eric (Lymon) developed a circuit for detecting the ecu going into (or trying to go into) safety boost conditions and displaying with a warning light. This would be VERY usefull if you were running an EBC - you can even use the circuit to switch a relay which would in turn, turn the boost controller solenoid off and return the car into safety boost...

http://www.pexcom.com.au/z32cms/e107_plugins/content/content.php?content.485

 

Hope the link works :)

Remember though that the det sensor only works up to 3k rpm then the ECU stops listening. To get det this low you would have to have some pretty bad fuel/fueling problem. If this was the case you REALLY don't want to be running high boost no matter what maps your in lol. I think Eric (Lymon) developed a circuit for detecting the ecu going into (or trying to go into) safety boost conditions and displaying with a warning light. This would be VERY usefull if you were running an EBC - you can even use the circuit to switch a relay which would in turn, turn the boost controller solenoid off and return the car into safety boost...

 

Last time I spoke to John he said that some research had been done that shows the stock det sensor detects detonation way above 3k rpm, but you would have to speak to him regarding the tech stuff?

when my car used to det id hear it way above 3k then i would get a sudden lose in power as saftey was enabled so id agree with topless.

The problem is that it can detect det above about 3.5k but it can't differentiate it from the rest of the engine noise at those speeds, so you would get false positives.

The problem is that it can detect det above about 3.5k but it can't differentiate it from the rest of the engine noise at those speeds, so you would get false positives.

 

 

You would have to talk to JD about it, somebody has done some in depth stuff on it that's all I know:o

Update,

 

Have Fitted new shiny blue intake boost hoses and re-done the boost controller pipework. One of the hoses wasn't exactly perfect, so thats sorted.

 

Fitted the new elec fan (what an arse that was!!!!)

 

moved the sender for the EBC to the other end of the balance bar so theres a single pipe between the fuel regulator and the balance bar.

 

Spark plugs and timing this weekend.

 

Have removed the PRVR, the plastic shield in front of the air filter and the large number plate.

 

Seams to be running fine at 10m psi.

 

WIll change plugs and do timing this weekend and hopefully that'll solve it!!!

Have removed the PRVR, the plastic shield in front of the air filter and the large number plate.

 

Seams to be running fine at 10m psi.

 

WIll change plugs and do timing this weekend and hopefully that'll solve it!!!

 

Don't forget to take into account the fact that the ambient temperature has dropped SIGNIFICANTLY!!!!! Don't count your chickens etc ;)

Don't forget to take into account the fact that the ambient temperature has dropped SIGNIFICANTLY!!!!! Don't count your chickens etc ;)

 

Up there for thinking, down there for dancing:D

Up there for thinking, down there for dancing:D

 

Awesome words of wisdom there from the fat fireman :rofl: :rofl: :rofl:

Leave it or the dog video will be coming out :D

>> I think Eric (Lymon) developed a circuit for detecting the ecu going into (or trying to go into) safety boost conditions and displaying with a warning light.

 

(On request) I can program this feature into our DTA chips nowadays :D

check engine light will blink on detection of detonation or once the car goes into safety boost.

 

>> Remember though that the det sensor only works up to 3k rpm then the ECU stops listening.

 

the ecu only really uses the detonation sensor signal in a small portion of the ignition map, but it "listens" always...on all rev ranges.

It has an electronic filter that will filter most (read: too much) of the engine noise above 3500 rpm, making it unsensitive to detonation.

 

-Eric

How much would the det sensor chip be Eric?

Leave it or the dog video will be coming out :D

 

hmmm i'm curious now, go on put it up :rofl:

well done for sticking with it james

Have now replaced the spark plugs for the longer / colder ones.

 

Just the timing left to check and will set it all up for 12 psi.

I have retarded the timing to 14 degrees and running 0.9 bar and no Det :dance: And that was yesterday in the heat!!!!!

 

So to recap......

New intercooler boost hoses,

fixed 2 boost leaks

better airflow through the bumper (small No. plate and removable filter splash gard for dry days)

New Colder burning spark plugs (NGK)

Removed PRVR system

Re-installed the EBC checking all pipes and adjusting it slightly

Set the Blitz ebc to Set 55, Gain 20 which equates to 0.9 bar boost (1 bar limiter)

Adjusted the timing from 17 degrees back to 14 degrees.

 

Thank you EVERYONE for your help :bow:

Sounds like a gooden :D you can put the timing back to 15 in the winter i recon.

Now just get one of these kits :D http://www.z1motorsports.com/product_info.php?products_id=1538

Good stuff James! Glad you got it sorted out in the end. It makes it all worth while to have a zed on full chat :D

 

I think I might knock my timing back a degree or so, intermittant safety boost.