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Software To Show Knock From Nissan Consult Cable

Rolls

By Rolls,
in Engines & Forced Induction

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Moodles2 Grand Master

Moodles2

Posted
Posted

Pretty sure knock isn't a variable reported via CONSULT, knock control is just something the ECU does internally to pull timing (or switch to a knock map). I know Matt from Nistune has worked on reporting a knock value in the past, but that was Nistune specific.

simpletool Mentor

simpletool

Posted
Posted (edited)

Agree with above.

Depending upon your ECU type Nistune MIGHT be able to extract some knock data (even trace it into a map for you). But some (Z32, etc) ECU types have not been sorted yet. Nistune is not free but it's also a long way from expensive.

Edited by simpletool
The Dan Grand Master

The Dan

Posted
Posted

Oscilloscope

Learn the frequency of the knock you are seeing and you will recognise it every time. Either that or get your car tuned at EFI performance and you'll never have to worry about knock ever again

Rolls Grand Master

Rolls

Posted
  • Author
Posted (edited)

Yeah nistune shows it but the demo only runs for 2 minutes which makes it pretty useless, dont feel like buying a license just for that single use.

Oscilloscope isn't really an option being as all of mine are AC powered and cant easily log when Im driving.

Elite Racing I am in SA and I don't really have enough trust in any of the Tuners here to not look at knock and make sure they've done it properly.

Can you recommend anyone that you would let tune your car and then drive it without checking they have done it properly? I need to find a tuner that I can trust to do it properly.

Edited by Rolls
STATUS Grand Master

STATUS

Posted
Posted
Yeah nistune shows it but the demo only runs for 2 minutes which makes it pretty useless, dont feel like buying a license just for that single use.

Oscilloscope isn't really an option being as all of mine are AC powered and cant easily log when Im driving.

Elite Racing I am in SA and I don't really have enough trust in any of the Tuners here to not look at knock and make sure they've done it properly.

Can you recommend anyone that you would let tune your car and then drive it without checking they have done it properly? I need to find a tuner that I can trust to do it properly.

nistune is in SA you could get Pete to do it?

Rolls Grand Master

Rolls

Posted
  • Author
Posted (edited)

sent an email off, hopefully they are willing to do it or know someone who will do a tune with the level of care and detail I want.

cheers for the info =)

Edited by Rolls
GTRNUR Grand Master

GTRNUR

Posted
Posted

I think it was guilttoy that said he was using a gizmo knock box to more accurately monitor knock. It apparently outputs a 0-5V signal based on knock level, which can be logged if interfaced to some sort of existing after market management. I never got around to looking into this myself... but one day.

STATUS Grand Master

STATUS

Posted
Posted
I think it was guilttoy that said he was using a gizmo knock box to more accurately monitor knock. It apparently outputs a 0-5V signal based on knock level, which can be logged if interfaced to some sort of existing after market management. I never got around to looking into this myself... but one day.

http://www.skylinesaustralia.com/forums/Gi...tml&hl=kmon :D

NewKleer Mentor

NewKleer

Posted
Posted

yes a standalone knocklite or similar is best way to go. consult doesnt report it. unsure but i think nistune knock reading requires the daughterboard and custom nistune 'code' on that board to report it - i think so, cant remember 100%. so dont think just getting the software will help.

Rolls Grand Master

Rolls

Posted
  • Author
Posted

Managed to get hold of pete from nistune, going to have a session with him and get him to show me around nistune and tuning in general whilst getting him to check everything over, thanks for the suggestion status.

Might ask if he can explain how nistune reports knock and how their protocol extension for consult works, if it is like the rest of consult it shouldnt be too hard to write my own program to pull the data out, if the data is easily made visible via consult I will give it a shot and post it up here for people, will report back.

  • 4 weeks later...
Rolls Grand Master

Rolls

Posted
  • Author
Posted (edited)

Just did a road tune with Pete from the Nistune guys last night, very friendly knowledgeable guy, was great to chat to!

It was a hot night around 31c which was good as that is probably the hottest weather I am going to push the car hard in, with his big knock ears found it getting a bit out of control around peak torque (5500rpm) in 3rd gear runs so pulled around 2-3degrees around that part of the map, car pulls identically but he said there was nothing he could hear afterwards, should be even better in the colder weather. On boost was around 11:1 so now that I can be confident if it doesn't knock at full load on 18psi in 30c then it shouldn't knock ever so I'm going to head out to mallala soon.

Found out my O2 sensor is dead so it was idling around 17:1 and around 15:1 on cruise at times, but would fluctuate down to 11:1 due to lack of O2 feedback so hopefully that will fix my poppy idle (too lean) and bad fuel economy (too rich), will put it on the dyno to see if it throws out the map once it is functioning.

Overall it looks like shaun from boostworx did a pretty good job, was originally tuned in cold weather and Pete reckons the knock he heard would have been impossible to detect on the dyno, due to different temp and loads. Not sure if the O2 was functioning when it was originally tuned, would have hoped that shaun would have picked that up but it is entirely possible it has died since then.

Still have a weird issue where in semi cold weather (car been sitting for 8 hours, any less or more and it doesn't do it) and it sits on 5 degrees timing until it warms up, makes it quite difficult to drive, being as there is about 8 correction maps it could be jumping to we weren't able to pinpoint that problem but such is tuning!

Highly recommend people get a road tune done after they've got their base map under control especially with someone sitting next to you who knows their stuff, even if they find the map is perfect it just leaves you with so much more confidence that the car is running safely and properly.

Thanks Status for the suggestion!

edit: Pete mentioned that the way the ecu reports knock is complicated and hard to use so they haven't even got their software able to log it vs cells yet, might be something that they crack in the future though.

Edited by Rolls

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