S-AFC 2 knock readings

[PMan_S13]

I'm just kind of curious what a good reading level would be for the knock sensor.

I mean the badly written manual shows pics with up to like 47 somethings of knock, but it never tells you the unit of measure or what a "bad" level would be.

and since I don't know what a bad level of knock reading would be, it kind of makes seeing the number useless. I mean I guess 0 would be perfect, but I would imagine you have to be running very rich to keep it at 0 the whole time. But I don't know, that's why I'm asking..

Someone out there have the magic number?

[huguetpj]

No magic # here. But I'm guessing 0 would be next to impossible cause all of the noise generated by the engine during normal operation.

[Nathan]

Maybe try driving the car normally with the boost set as low as possible...kinda establish a baseline that way. That's what I'm planning to do to establish my EGT baseline Or, dyno tune it and set a baseline where the A/F ratio is good and check out the knock sensor then to get a baseline reading. You might not have a dyno in Circleville though

[PMan_S13]

haha, yeah when I go to dyno I have to go to Columbus. Nothing in Circleville but overpricing muffler shops

yeah I have driven it for the last 2 days. the highest reading I have gotten was like 60 something. At idle it is like 20-40. but when just giving it a bit of gas I get 0 knock from like idle up to about 3 grand. So it isn't impossible. I can't really tell how it does on boost yet cause I have some issue that is driving me nuts.. if I can't find my answer by searching I am gonna post a new thread..

By the way, anyone have similar numbers to those above as a benchmark?