Self learning EFI - Design Thoughts

[slyalfa]

"pressure transducer spark plugs"
Do you know where to get some and how much?

I have not been able to find a small pressure transducer my self to make my own.
I thought I might be able to use a watch crystal but it seems to not notice pressure but did show shock.
I was thought it might work and is the right size to fit in to a spark plug.
in the lab busting in 135PSI into the can did not show anything but tapping on the can did.
might still be fun to try one. I bet it would pick up det real well.

[turbolarespider]

We use products from Kistler. And you need pressures up to about 5000 psi, so that you know the probes wont break.

Eric

[slyalfa]

I looked at there web page and could not find any sparkplugs type or a tiny one I could add to a sparkplug.
do you have a part number?

[turbolarespider]

Sorry- they don't do spark plugs- they do the high speed pressure transducers. I'm not sure who fabricates the plugs- but we just put a small metal hose from the transducer to the metal part of the plug that, deep enough to get in cylinder pressures.

Not all that durable- I think we keep the milage to under 100 for a car, or the dyno isn't an issue- easy to replace.

The far better option is to install the transducers in the head. Expensive, and again, not all that durable.

[slyalfa]

hmm I guess the tube is so small it does not change anything. like a pin hole in size I guess.
google showed a few
PSIplug & CALplug
PIEZOCRYST: Advanced Sensorics GmbH - Pressure Sensors

The last time I searched I could not find anything other then a pic of one. now there seems to be a few making them. but I have not got any pices yet. I saw a post on a other forum that said over $1000
I hope to find just the transducer plug for a lot less than that. but if not I might try the small hose trick.
I think no mater what it will not last long so somthing cheap(r) would be best.