Knock Detection - TriStateTuners.com :: Home of Tristate Auto Enthusiast

sisforsurfing · 11-14-2006, 12:17 PM

As I keep reading about Open Source ECU tuning (free reflashing software for Subaru's and Mitsubishi's), I find more and more information. As much as I want to be able to just flash the Stage 2 maps that are available, they're not as tried-and-true as the Cobb maps, and definitely no where near as confidence-inspiring as an ECUtek tune. A wideband O2 and EGT sensors are pre-requisites for me, but then there's the subject of knock. I had always thought knock detection was done via logging; seeing when knock was occuring (and timing being pulled) and tuning accordingly. That has scared me because I'd rather know I am pinging while it's occurring... not after I do a WOT 4th gear pull and see 30 counts of knock.

Reading the Enginuity forums, I came across a pretty interesting (to me) thread, "Det cans, Knock Link, Knock Lite. Anyone using them?". Basically, has anyone had experience using Knock lights or stethoscope-like devices to pay attention to knock?
A device like this one at the top of the page seems very simple and easy to rig up, so I was thinking of doing so before I start reflashing my car so I can get used to what I should be hearing. The TXS knock lite also looks like it's now on my list, but I'm not sure.
Anyone with any experience tuning their own car feel free to chime in!

edit: ughh sorry I posted this in Engine Performance, I thought I was in Engine Management and tuning... what a noob. Mods please move.

Intercooled T · 11-14-2006, 12:20 PM

i had a scanmaster on my Grand National...real-time knock detection, worked really really well....i know they have 'em for Subaru's too these days...mine was $200, easy to install and I believe has an option for audible alert

sisforsurfing · 11-15-2006, 11:47 AM

Yeah that looks similar to some of the 'knock boxes' out there for Subie, and the TXS Knock Light.

I'm surprised no one else has responded though

Intercooled T · 11-15-2006, 01:10 PM

It also monitors tps, o2's, coolant temp, boost (w/ relay), iac, etc....

teh DIRT · 11-15-2006, 01:13 PM

J&S safeguard is a knock detector that also pulls timing the instant it senses knock.

Intercooled T · 11-15-2006, 05:19 PM

doesn't every car w/ a knock sensor retard timing? I mean, isn't that the point?

lagos · 11-15-2006, 10:20 PM

i made my own knock response detection by taping into the boost selenoid that is known to be turned off when knock response happens. might be worth looking into that, to see if its possible to do on a subaru.

here is how i made mine.
http://celicatech.com/forums/showthr...985#post226985

SoStock92 · 12-02-2006, 01:42 AM

Quote:

Originally Posted by sisforsurfing

As I keep reading about Open Source ECU tuning (free reflashing software for Subaru's and Mitsubishi's), I find more and more information. As much as I want to be able to just flash the Stage 2 maps that are available, they're not as tried-and-true as the Cobb maps, and definitely no where near as confidence-inspiring as an ECUtek tune. A wideband O2 and EGT sensors are pre-requisites for me, but then there's the subject of knock. I had always thought knock detection was done via logging; seeing when knock was occuring (and timing being pulled) and tuning accordingly. That has scared me because I'd rather know I am pinging while it's occurring... not after I do a WOT 4th gear pull and see 30 counts of knock.

Reading the Enginuity forums, I came across a pretty interesting (to me) thread, "Det cans, Knock Link, Knock Lite. Anyone using them?". Basically, has anyone had experience using Knock lights or stethoscope-like devices to pay attention to knock?
A device like this one at the top of the page seems very simple and easy to rig up, so I was thinking of doing so before I start reflashing my car so I can get used to what I should be hearing. The TXS knock lite also looks like it's now on my list, but I'm not sure.
Anyone with any experience tuning their own car feel free to chime in!

edit: ughh sorry I posted this in Engine Performance, I thought I was in Engine Management and tuning... what a noob. Mods please move.

Gif-

I have KnockSense (www.viatrack.ca) and it is helpful for a base tune but honestly my WG and motor are loud enough that it pics of vibrations and false knock. However, for a more conventional motor its very useful.

I can show you how it works next time you're around.

11-14-2006, 12:17 PM	#1
sisforsurfing Tri-State Post Whore Join Date: Mar 2005 Member #267 My Ride: 2003 WRX wagon iTrader: (2)	Knock Detection As I keep reading about Open Source ECU tuning (free reflashing software for Subaru's and Mitsubishi's), I find more and more information. As much as I want to be able to just flash the Stage 2 maps that are available, they're not as tried-and-true as the Cobb maps, and definitely no where near as confidence-inspiring as an ECUtek tune. A wideband O2 and EGT sensors are pre-requisites for me, but then there's the subject of knock. I had always thought knock detection was done via logging; seeing when knock was occuring (and timing being pulled) and tuning accordingly. That has scared me because I'd rather know I am pinging while it's occurring... not after I do a WOT 4th gear pull and see 30 counts of knock. Reading the Enginuity forums, I came across a pretty interesting (to me) thread, "Det cans, Knock Link, Knock Lite. Anyone using them?". Basically, has anyone had experience using Knock lights or stethoscope-like devices to pay attention to knock? A device like this one at the top of the page seems very simple and easy to rig up, so I was thinking of doing so before I start reflashing my car so I can get used to what I should be hearing. The TXS knock lite also looks like it's now on my list, but I'm not sure. Anyone with any experience tuning their own car feel free to chime in! edit: ughh sorry I posted this in Engine Performance, I thought I was in Engine Management and tuning... what a noob. Mods please move. __________________ *To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.*

11-14-2006, 12:20 PM	#2
Intercooled T Tri-State Post Whore Join Date: Mar 2005 Location: Fairless Hills, PA Member #207 My Ride: 2003 Toyota Rav4 iTrader: (0)	i had a scanmaster on my Grand National...real-time knock detection, worked really really well....i know they have 'em for Subaru's too these days...mine was $200, easy to install and I believe has an option for audible alert __________________ 2003 Toyota Rav4, 2.0L/Auto/AWD To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. 2013 Nissan Juke, 1.6T/Auto/FWD (wife's car lol To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. )

11-15-2006, 11:47 AM	#3
sisforsurfing Tri-State Post Whore Join Date: Mar 2005 Member #267 My Ride: 2003 WRX wagon iTrader: (2)	Yeah that looks similar to some of the 'knock boxes' out there for Subie, and the TXS Knock Light. I'm surprised no one else has responded though __________________ *To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.*

11-15-2006, 01:10 PM	#4
Intercooled T Tri-State Post Whore Join Date: Mar 2005 Location: Fairless Hills, PA Member #207 My Ride: 2003 Toyota Rav4 iTrader: (0)	It also monitors tps, o2's, coolant temp, boost (w/ relay), iac, etc.... __________________ 2003 Toyota Rav4, 2.0L/Auto/AWD To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. 2013 Nissan Juke, 1.6T/Auto/FWD (wife's car lol To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. )

11-15-2006, 05:19 PM	#6
Intercooled T Tri-State Post Whore Join Date: Mar 2005 Location: Fairless Hills, PA Member #207 My Ride: 2003 Toyota Rav4 iTrader: (0)	doesn't every car w/ a knock sensor retard timing? I mean, isn't that the point? __________________ 2003 Toyota Rav4, 2.0L/Auto/AWD To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. 2013 Nissan Juke, 1.6T/Auto/FWD (wife's car lol To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. )

11-15-2006, 10:20 PM	#7
lagos Tri-State Post Whore Join Date: Oct 2005 Location: Philadelphia, PA Member #989 My Ride: Toyota Celica GT-Two iTrader: (0)	i made my own knock response detection by taping into the boost selenoid that is known to be turned off when knock response happens. might be worth looking into that, to see if its possible to do on a subaru. here is how i made mine. http://celicatech.com/forums/showthr...985#post226985 __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. The accelerator on my toyota has always been stuck to the floor.. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

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