Knock control question

gtman

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I tried out another tune today where I raised boost up to around 21.5psi and raised the torque limit to 272nm at 4000rpm and up. It made a nice little difference from the base +6 tune.

I went out on a long drive and did a datalog. Now, in the past with the base +6 tune, my K control rarely even went past .54 unless I did a pull and even then it only went up to maybe .60 and then quickly went down to .54...

I run 93 octane with 10% ethanol.

On today's run, I push it HARD. Very hard. At high speed. And keep in mind most of this driving was slightly uphill. I did multiple pulls in close succession as you can see:

Honda Civic 10th gen Knock control question Capture.GIF


After that, my K. Control shot up to .70 for quite a while and then finally went back down to .59 after about 7-8 minutes of more sedate driving. Does that seem about right?

I really like the bump in power tune this gives me over the base +6.
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charleswrivers

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I'm in an Si... so it's a bit different given it's different compression/turbo/breaks it gets on gearshift vs your CVT giving power constantly... but with Ktuner, which gas a .49 minimum as I recall, it took several successive pulls 1st to 3rd to get it to move at all... and I reach something like .58, and that's with +1 ignition added.

Again, different car... same fuel... probably a milder day (3 months ago)... but the top of 3rd is still reasonable merging on the interstate... so I'm going to imagine you were doing more. Making K.cont ride and retarding ignition a little under high sustained load sounds like it's doing it's job... and that value doesn't sound bad given the situation. I've heard of people messing with tunes and stabbing the throttle and getting a lot higher.

Mines a lot different so hopefully you'll get a CVT owner with the same compression/turbo to respond... but I figure I'd throw something your way.
 

dc2turbo

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just a future tip... Posting pictures of a datalog isn't going to help. We can't see what's going on

Most likely had a HIGH IAT and knock control took over if you didn't setup an IAT RETARD
 
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gtman

gtman

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I'm in an Si... so it's a bit different given it's different compression/turbo/breaks it gets on gearshift vs your CVT giving power constantly... but with Ktuner, which gas a .49 minimum as I recall, it took several successive pulls 1st to 3rd to get it to move at all... and I reach something like .58, and that's with +1 ignition added.

Again, different car... same fuel... probably a milder day (3 months ago)... but the top of 3rd is still reasonable merging on the interstate... so I'm going to imagine you were doing more. Making K.cont ride and retarding ignition a little under high sustained load sounds like it's doing it's job... and that value doesn't sound bad given the situation. I've heard of people messing with tunes and stabbing the throttle and getting a lot higher.

Mines a lot different so hopefully you'll get a CVT owner with the same compression/turbo to respond... but I figure I'd throw something your way.
Charles, Hondata's minimum is .54 to let you know.

I definitely drove it hard for about 10 minutes on and off before the K. Control shot up to .70...

Disclaimer: I did the run this morning when there was no traffic on the highway. And yes I drove it very fast. Basically punching it from 60-65 mph to well over 110 mph multiple times. The power delivery sure felt smooth in that range. :)
 
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gtman

gtman

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just a future tip... Posting pictures of a datalog isn't going to help. We can't see what's going on

Most likely had a HIGH IAT and knock control took over if you didn't setup an IAT RETARD
dc ... the datalog was too big to upload here. I just looked at the log and you are exactly right. After the multiple pulls the IAT shot up and K. Control took over until the IAT's came down.
 


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gtman

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I really like this tune I did. Drove on my normal commute today and knock control never got above 54.
 

BoostedDreams

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How do you change the torque limits? If you have lets say 20psi after 4,000rpm and set torque lower than whatever that torque would be at 20, will it make whatevers lower? Im in an si and ktuner
 

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How do you change the torque limits? If you have lets say 20psi after 4,000rpm and set torque lower than whatever that torque would be at 20, will it make whatevers lower? Im in an si and ktuner
KTuner software is different
TQ is controlled by boost. So you just lower your boost table values to whatever you desire
 


 


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