Knock Control Settings/Loads

[Lee5]

Hi,

Been looking at the following and wondered if someone can shed some light on how it all works.... i.e if you increase the load on the multiplier its more prone to remove / cancel out the detection of knock? If my assumption is correct the reason the mid range RPM had a multiplier of 61 and you up'd it to 65 for example that when the Cam duration changes the chance of it detecting the random knock would be less and if number was lower than 61 the chance is increased?

See below image.....

http://img517.imageshack.us/img517/7529/knockcontrol1az3.jpg (http://imageshack.us)

Discuss

Cheers

Lee

[GrayW]

You don't need all the tables to increase the base noise threshold.

[Lee5]

All the tables are just diagrammatic, I'm just concentrating on the mid range when the cam durations change which has the higher number. Others are only there as i just want to know how it works. I take it as they both have lower numbers eg 20 or less they have a higher chance of detecting the knock frequency. Is that correct??

[Lee5]

Anyone else ????

Lee

[GrayW]

Increasing the number basically increases the multiplier see here (http://forums.evolutionm.net/ecuflash/382625-knock-control-load-vs-rpm-table-found.html).

[Lee5]

Increasing the number basically increases the multiplier see here (http://forums.evolutionm.net/ecuflash/382625-knock-control-load-vs-rpm-table-found.html).

Cheers Gray, I have read that but so many posts and the yanks talk in riddles half the time:lol:

I just wanted it in more a pikey way to understand it.......:blink:


Lee

[GrayW]

JB will be along to turn you to a super geek anytime.

[AndyF]

Lee,
From looking at Mr Banks' first 2 posts on that thread, I would hazard a guess that the first table is basically the load above which the knock control 'activates'.

Basically what it's saying is that below 2500rpm, the knock control is deactivated and then at 2500 rpm you need to be above load point 60 before it activates, at 3000rpm you need to be above 70 load etc etc.

Andy

[AndyF]

Also, apparently the 2nd table is the same thing re load/rpm but it's to do with when the octane flag changes i.e. if you get knock below 3000rpm then the octane flag still won't change and if you get knock at 3500 rpm but below 100 load then it still won't change but above that and it will start to alter the octane flag.

[Lee5]

Yea thats what i was thinking, where it says 159.2 in the load areas there is no knock control.

Also from reading the posts the 1st table is 0-3800 rpm then it swaps over to table 2, 3800- 4600 and then table 3 4600 to the red line.

Lee

[AndyF]

There is knock control in those areas but only if you go over 160 load which is highly unlikely unless you're running a stroker with std turbo etc. I would have thought.

From what John is saying, it's only the 1st table that is used in the knock routines so I wouldn't bother changing the other tables at all TBH.

Andy

[Lee5]

ok cool I will do some logging and see what happens :)

Thanks Andy.

Lee