Knock Box Talk

Post by **Holden202T** » Wed Nov 25, 2015 9:07 pm

I agree, unfortunately can't help with designing electronic diagram cause I only know basics!

Post by **vlad01** » Wed Nov 25, 2015 9:21 pm

Im good at reading schematics and working out problems but pretty average coming up with designs from scratch.

All I know is op amps are involved lol.

kojab · Post by **kojab** » Thu Nov 26, 2015 6:56 am

Why re-invent the wheel.

Festy's Programmable digital knock filter http://pcmhacking.net/forums/viewtopic. ... ock+filter

It does work. You just have to spend time to understand how to set it up. I am very impressed in the design and software control of this little board. The same HIP9011 chip is used in factory and after market ecus.

Post by **Holden202T** » Thu Nov 26, 2015 8:16 am

yeah Im interested in getting one of these and connect it to the alloytec knock sensor im currently trying to permanently fit to my 202 block

Post by **vlad01** » Thu Nov 26, 2015 10:42 am

I spoke to festy. It doesn't have audio abilities so it not much use to me.

Post by **Jayme** » Thu Nov 26, 2015 11:35 am

it might be easier to feed your audio signal into your laptop mic in, then have an app do the audio processing, then feed it out the headphone port of your laptop...

kojab · Post by **kojab** » Thu Nov 26, 2015 12:09 pm

vlad01 wrote:I spoke to festy. It doesn't have audio abilities so it not much use to me.

Knock detected output from festy's board gives a digital 5 volt output pulse which can be sustained up to 250ms (1/4 of second). Would not take too much to make some audio with that output.

For me I am not that interested in hearing it. I just want to know exactly where it occurs when logged with RPM Map etc. Seeing it occur in a log is a must.

Hearing it must be for the dyno guys who often don't log at all. In saying that I am sure all the dyno guys on this forum do log, they have seen the benefits.

Post by **antus** » Thu Nov 26, 2015 12:17 pm

For hearing back in 2011 Delcowizzid recommended this https://pcmhacking.net/forums/viewt ... 244#p13529

The ebay link is dead, so i'll attach the pic of the device he was talking about.

I built one up, but never ended up using it.

0081 · Post by **0081** » Thu Nov 26, 2015 1:28 pm

Looks like you can still get them on ebay, looks the same.

item number 171948974837

Post by **vlad01** » Thu Nov 26, 2015 3:04 pm

It's not really about logging it, rather a to to verify what's real or what's false. On the dyno it's easy as logging isn't needed as your are tuning steady state real time.

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