cylinder pressure sensor

[MWfire]

Does anybody know where i can buy cheap cylinder pressure sensor like
this one http://www.tfxengine.com/SensorsOverall.html (1250$)?

[gunni]

They are like widebands on the olden days.
They are expensive cause they are not common stuff yet.
When cars start coming with sensors like that in the plugs as standard then they´ll be well cheap

[ryniobl]

hi.I found the cheapest one for approx. 400$ that would fit into a hole drilled in a spark plug(threaded approx3-4mm).That was few months ago and unfortunately I can't remember where 
Try to google it.

Keywords are:
-miniature
-subminiature
-ultra miniature
-micro
-pressure
-sensor
-transducer

Good luck 

[GintsK]

Sensor itself is just half of problem. Other is some data analysis equipment. Simple o-scope here is not enough.

[MWfire]

Sensor itself is just half of problem. Other is some data analysis equipment. Simple o-scope here is not enough.

I have same equipment from my experiments with ion sensor. I need only sensor.

[ryniobl]

I agree Gints,but it depends what do You really want to see.If You wanna see exact point when the peak pressure occurs (deg ATDC), then You need something to calculate that angle from TDC (camsync) sensor and RPMs,and if You need simple knock indicator,than You actually need to know pressure level.I mean when knock occurs ,then in cyl. pressure is much higher then without knock.

[MWfire]

I agree Gints,but it depends what do You really want to see.If You wanna see exact point when the peak pressure occurs (deg ATDC), then You need something to calculate that angle from TDC (camsync) sensor and RPMs,and if You need simple knock indicator,than You actually need to know pressure level.I mean when knock occurs ,then in cyl. pressure is much higher then without knock.

for knock you only need high pass filter(>4-5kHz).

btw i have 60-2 trigger whell, so i can only with osciloscope can see where is PPP.

[dnb]

The signal processing requirements are not huge.  I think you could probably do OK with some buffering electronics and a laptop sound card to monitor the trigger signal + USB scope for the pressure signal.

I can't see anything with a huge bandwidth here.

[MWfire]

Any new spark plug which can measure cylinder pressure? Any cheap?

[ryniobl]

Any new spark plug which can measure cylinder pressure? Any cheap?

Be patient.I going to order it in monday 
and  I will post some pictures of sparkplugs I have made.
Stay tuned

[MWfire]

Any new spark plug which can measure cylinder pressure? Any cheap?

Be patient.I going to order it in monday 
and  I will post some pictures of sparkplugs I have made.
Stay tuned

Where did you order and what is price?

[multiplex]

oh man.. this is exciting, can't wait for more details 

[ryniobl]

I have it ordered....finally 
The one is here http://www.optrand.com/  click on ''product flier'' just above small picture.
The price is 980$ shipped.
It has 100Bar range and 0.1bar resolution.good enough.    I hope.
Lead time: 3-4 Weeks 

[MWfire]

I have it ordered....finally 
The one is here http://www.optrand.com/  click on ''product flier'' just above small picture.
The price is 980$ shipped.
It has 100Bar range and 0.1bar resolution.good enough.    I hope.
Lead time: 3-4 Weeks 

I had problem with then, they just ignored me. Can you ask them for two more sensors?

And it's option to cheap change spark plug when is dead?

[ryniobl]

I asked if they can send 10 sensors ,and they said ok with 10%off and 140$ for shipping
Spark plug cost about 300$,but I have made one myself for free well almost.I destroyed many before I have done one.Now its easy.I will come up with some pictures soon.