In Chamber Testing

[Barry Bordes]

Originally Posted by RICE RACING

Can you please show me where and how the sensors (pressure) are fixed into the rotor housings.
After the above failurs
Where is the EGT sensor located? what type is it. What calculation (model is used) to guess the temperature at places aside from where a physical hard measure is taken?

How are you measuring the AFR exactly.

I thought about using their stuff but they could not answer any of my more detailed questions on their systems so I left it alone, interested to see what you have found and if you can shed any light on the above and also what cross checks you use to validate the outputs from their equipment.

Peter, my EGTs are 2” from the port in a HKS cast divided manifold.

TFX uses calculations for burn rate by watching the pressure rise. We enter degrees for port opening then the calculations give temp and pressure at opening.

My AFRs are measured in the downpipe 18” from the turbo flange.

I am getting some early detonation indications when the peak pressure is located less than 45º ATDC. Clint, "the mentor", says we can check the stock knock sensor for accuracy. Unfortunately my computer cannot run both programs (datalogit & TFX) concurrently.

Some of the specs on the sensor:

Non-linearity & Hysteresis
Full Scale Output
±1% Combustion
±0.5% Non-Combustion
±0.25% Available

Frequency Response
0.1 Hz to 10 kHz
0.1 Hz to 20 kHz
1.0 Hz to 30 kHz

More at
http://www.optrand.com/products.htm

Barry

[RICE RACING]

Originally Posted by Barry Bordes

Peter, my EGTs are 2” from the port in a HKS cast divided manifold.

TFX uses calculations for burn rate by watching the pressure rise. We enter degrees for port opening then the calculations give temp and pressure at opening.

My AFRs are measured in the downpipe 18” from the turbo flange.

I am getting some early detonation indications when the peak pressure is located less than 45º ATDC. Clint, "the mentor", says we can check the stock knock sensor for accuracy. Unfortunately my computer cannot run both programs (datalogit & TFX) concurrently.

Some of the specs on the sensor:

Non-linearity & Hysteresis
Full Scale Output
±1% Combustion
±0.5% Non-Combustion
±0.25% Available

Frequency Response
0.1 Hz to 10 kHz
0.1 Hz to 20 kHz
1.0 Hz to 30 kHz

More at
http://www.optrand.com/products.htm

Barry

Thanks Barry,

Who do you talk to there? you can E-Mail me if you like or PM to save commentary from others, thanks.

[RETed]

Do we really need to turn this into a playground spat?
Can we drop the name calling?

This thread is GOLD.
Anyone who understands the data being presented knows that this kinda stuff is PRICELESS.
I think this is the first time I've seen such data on ANY RX-7 type of forum.
I've only read about stuff like this is SAE papers.
To have a member actually messing around with such equipment is just unheard of.

It would be sad if this thread gets closed.


-Ted

[Barry Bordes]

Originally Posted by RICE RACING

Thanks Barry,

Who do you talk to there? you can E-Mail me if you like or PM to save commentary from others, thanks.

Peter,

My contact at TFX Engine Technology is Clint Gray.

Their website has a better explanation of all the functions. http://www.tfxengine.com/index.html

Their system goes for about 5k. The plug was $1300.

All technical input is appreciated,

Barry