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paulr33

EVO 8 V44 plugin - no knock or speed input?

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from the manual

Later model vehicles (2000 onwards) may have difficultly operating with the Internal knock detection circuitry. This is due to the use of "2nd Harmonic" knock sensors that some manufactures are factory fitting. There are two solutions to this problem: 1. Contact your nearest Vi-PEC dealer for the purchase of an after-market knock sensor.

I am trying to use the factory 4g63 sensor but happy to replace with an aftermarket unit if someone can tell me what sensor will work with the link knockblock and what sensor settings to select on the box, i.e FREQ setting

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Out of curiosity I tried gain level 2 but with noise cancellation and the level appeared the same so I’ll just disable knock control

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I have no experience with the knock block as it was before I started working for Link.  But a couple of comments from looking at your log:  

You are only logging at 10Hz, that is not going to give a good picture of what is going on.  ECU logging in the V series was a bit restrictive and doesnt give you the individual cylinder levels etc.  I would suggest doing a PC log at 40Hz with all parameters logged so we have a bit more info to go on.

It also sounds like you might need to change to a wideband sensor but try it with what you have now before jumping to conclusions.  

 

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thanks , i think i have a better picture of it now, so basically log at the highest possible rate (40hz) then use that to build a knock map of what the engine looks like under good health without detonation

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Can you just do a pc log as it is now so we can first confirm if the noise levels being reported by the system looks like it follows some sort or realistic trend.  

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see attach 40hz log from my car tonight. the log data pattern for knock follows engine load so i think the sensor is working, but again it still shows the data pattern where in one cell its 0 knock level then the next cell its almost at the max range, i.e

Section time: 98.225 - knock level global: 0
Section time: 98.25 - knock level global: 620

Thanks for your help

Log 22-03-19 9;03;34 pm.zip

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ok ive found the issue, its how its calculating per cyclinder and the overall aggregate, see below. it says global level is 0 but it shows numbers per cyclinder still

1024093310_dataset.thumb.png.359cd8625248554fa785bbc50234af38.png

 

ill do some work on this tonight and see what the issue is, thanks for your help

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Looks like it is showing a reasonable trend to me.  Knock level global as far as I know is the unwindowed/unprocessed raw level from the knock input and I suspect it is not relevent when using the external processing system.  You need to use the knock level 1 & 2.  Since you are wasted spark, 3 & 4 will just be identical to 1 & 2.

WHYyOW6.png

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Is there a recommended rpm I should be travelling at when I do gear ratio calc in each gear? Evo 8 runs 6 speed close ratio and currently I get quiet a bit of “gear 0” in my logs. I’ll re do all calcs in every gear from scratch, I was thinking 3500rpm in every gear when I do calibrate ?

 

also for the onboard boost control is there a specific solenoid you recommend? I have an eBoost2 and want to use per-gear control so can I re-use that solenoid or should I get a new Vipec compatible one? The wire to the ecu “aux 2” on my v44 evolution 9 is this a Switched ground to the solenoid? 

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15 hours ago, paulr33 said:

Is there a recommended rpm I should be travelling at when I do gear ratio calc in each gear? Evo 8 runs 6 speed close ratio and currently I get quiet a bit of “gear 0” in my logs. I’ll re do all calcs in every gear from scratch, I was thinking 3500rpm in every gear when I do calibrate ?

No specific RPM requirement, somewhere around there will be fine.  Another option besides driving it is just to jack the wheels up off the ground and drive it on the spot.

 

16 hours ago, paulr33 said:

also for the onboard boost control is there a specific solenoid you recommend? I have an eBoost2 and want to use per-gear control so can I re-use that solenoid or should I get a new Vipec compatible one?

That will be fine.  

 

16 hours ago, paulr33 said:

The wire to the ecu “aux 2” on my v44 evolution 9 is this a Switched ground to the solenoid? 

The aux outputs are lowside drive (switch to ground).  

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