Bosch knock sensor
#1
Honda-Tech Member
Thread Starter
Bosch knock sensor
Wonder if anyone here is using a Bosch knock sensor and if so how/where did you mount it. I'd like to put it in the stock location but I think the only way to do that is drill/tap the block and I'd rather not have to tear the engine out of the car. I just don't think I could do a good job of it with the block in the car.
Looks like Bosch sensor mounts with m8x1.25 bolt and the stock knock sensor appears to be m12x1.25.
TIA
Looks like Bosch sensor mounts with m8x1.25 bolt and the stock knock sensor appears to be m12x1.25.
TIA
#2
Honda-Tech Member
iTrader: (1)
Re: Bosch knock sensor
You could probably make an adapter yourself or have on machined out of a small piece of steel round stock.
In for this because I'm interested in implementing some knock monitoring myself.
In for this because I'm interested in implementing some knock monitoring myself.
#3
Honda-Tech Member
Thread Starter
Re: Bosch knock sensor
I was thinking about cutting a m12 stud to the length I need and then welding on a m8 stud. I figure red loctite on the threads would hold it in the block. I'm just not sure if I can pull it off.
#5
Moderator in Chief
iTrader: (2)
Re: Bosch knock sensor
Check out page 9 of my build thread.
https://honda-tech.com/forums/showth...3086196&page=9
I say in my thread this welded bolt method amplified the harmonics but I later found that was an unrelated issued. So I believe this is still an easy solution.
However I ended up using these. 90245A173 from Mcmaster.
https://honda-tech.com/forums/showth...3086196&page=9
I say in my thread this welded bolt method amplified the harmonics but I later found that was an unrelated issued. So I believe this is still an easy solution.
However I ended up using these. 90245A173 from Mcmaster.
#6
Honda-Tech Member
iTrader: (1)
Re: Bosch knock sensor
I remembered seeing/reading about that welded bolt somewhere! Those helicoils look like the hot ticket though. I didn't think they made them with that drastic a size difference.
#7
Honda-Tech Member
Thread Starter
Re: Bosch knock sensor
Check out page 9 of my build thread.
https://honda-tech.com/forums/showth...3086196&page=9
I say in my thread this welded bolt method amplified the harmonics but I later found that was an unrelated issued. So I believe this is still an easy solution.
However I ended up using these. 90245A173 from Mcmaster.
https://honda-tech.com/forums/showth...3086196&page=9
I say in my thread this welded bolt method amplified the harmonics but I later found that was an unrelated issued. So I believe this is still an easy solution.
However I ended up using these. 90245A173 from Mcmaster.
Thanks for the info. Those inserts you used are what I was trying to find but had no luck. Do you think it would be possible to put them in without removing the Intake? If I have to I have to, but it would be cool if I didn't have to. I like your solution for bypassing the tool you are supposed to use for the inserts.
spAdam, I'll let you know how it works, I plan to order today.
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#9
Honda-Tech Member
Thread Starter
#10
Honda-Tech Member
iTrader: (1)
Re: Bosch knock sensor
I still might try to whip something upon the lathe. I want to be able to revert to obd2 in case I move to a state that does inspections. Right now all I have to do is plug in an ecu and thread a second O2s into the cat. It's nice peace of mind.
#11
Honda-Tech Member
Thread Starter
Re: Bosch knock sensor
Good luck!
#12
Honda-Tech Member
iTrader: (1)
Re: Bosch knock sensor
Back from the dead, but I just stumbled on this:
About $3-4 from Toyota. Hopefully this info will help some people.
I obviously never got to work on this, but now that life is settling down a little I'm starting to revisit some of my projects.
About $3-4 from Toyota. Hopefully this info will help some people.
I obviously never got to work on this, but now that life is settling down a little I'm starting to revisit some of my projects.
#13
I'm Huge In Japan
Re: Bosch knock sensor
I use the knocksense on some cars with the helicoils, either in the original knock port or on one of the extra exhaust bracket holes.
But I would suggest using a pitchfork or a frequency generator to dial in the pot. There's a frequency calculator here:
http://www.phormula.co.uk/KnockCalculator.aspx
I use a frequency generator phone app, and just feed the leads from my phone's headphone jack to the knocksense.
But I would suggest using a pitchfork or a frequency generator to dial in the pot. There's a frequency calculator here:
http://www.phormula.co.uk/KnockCalculator.aspx
I use a frequency generator phone app, and just feed the leads from my phone's headphone jack to the knocksense.
#14
Honda-Tech Member
iTrader: (3)
Re: Bosch knock sensor
I use the knocksense on some cars with the helicoils, either in the original knock port or on one of the extra exhaust bracket holes.
But I would suggest using a pitchfork or a frequency generator to dial in the pot. There's a frequency calculator here:
http://www.phormula.co.uk/KnockCalculator.aspx
I use a frequency generator phone app, and just feed the leads from my phone's headphone jack to the knocksense.
But I would suggest using a pitchfork or a frequency generator to dial in the pot. There's a frequency calculator here:
http://www.phormula.co.uk/KnockCalculator.aspx
I use a frequency generator phone app, and just feed the leads from my phone's headphone jack to the knocksense.
#15
I'm Huge In Japan
Re: Bosch knock sensor
you can't just wire it directly to a light, it won't tell you anything. you CAN wire it to your speakers though; it's basically a microphone after all. but the electronics filter out the redundant engine noise so you can actually hear the knock, which is very difficult to detect otherwise.
#21
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Re: Bosch knock sensor
#24
I'm Huge In Japan
Re: Bosch knock sensor
Knock occurs at TDC, so the farther from TDC you are, the less reliable your signal is.
Valve noise on low displacement should not be an issue if your sensor is properly filtered.
I've had a few clients just epoxy a bolt to the block between cylinder 2 & 3, which is ideal placement. Doesn't seem to dampen signal at all, to my surprise. I ended up having to do it to a Z6 block myself, even with floating pistons it's still accurate.
Valve noise on low displacement should not be an issue if your sensor is properly filtered.
I've had a few clients just epoxy a bolt to the block between cylinder 2 & 3, which is ideal placement. Doesn't seem to dampen signal at all, to my surprise. I ended up having to do it to a Z6 block myself, even with floating pistons it's still accurate.
#25
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Join Date: Dec 2006
Location: Holiday, FL
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Re: Bosch knock sensor
Knock occurs at TDC, so the farther from TDC you are, the less reliable your signal is.
Valve noise on low displacement should not be an issue if your sensor is properly filtered.
I've had a few clients just epoxy a bolt to the block between cylinder 2 & 3, which is ideal placement. Doesn't seem to dampen signal at all, to my surprise. I ended up having to do it to a Z6 block myself, even with floating pistons it's still accurate.
Valve noise on low displacement should not be an issue if your sensor is properly filtered.
I've had a few clients just epoxy a bolt to the block between cylinder 2 & 3, which is ideal placement. Doesn't seem to dampen signal at all, to my surprise. I ended up having to do it to a Z6 block myself, even with floating pistons it's still accurate.
Since I'm redoing my setup to an LS bottom end and using Full floating P72A0 Nippons with your cookie cutter forged B Series H beams I'm thinking about getting a secondary sensor that way I can run two where one will be in stock placement up top and the other will be where my current sensor is....