Posted by andre on April 25, 1998 at 03:40:34:

So far, in my modification odyssey, I've been trying to stick to the "get the most out of what you've got" philosophy by doing tuning modifications, without resorting to the "usual" power adders (I'm working on getting a nitrous system right now, but that's going to be track-only). Anyway, I think I'm to the point now that if I want further improvements
from my engine, I really actually need to know something about it. OptRand seems to make in-cylinder optically isolated high temperature pressure sensors hat could be used for combustion analysis. What do you usually do when you want to see in-cylinder pressures, temps, etc.?

once again, thanks,
Andre

Posted by T.O.O. on April 25, 1998 at 20:58:46:
In Reply to: T.O.O. what do you think of optrand? posted by body on April 25, 1998 at 03:40:34:

I'm not familiar with the unit. Why don't you post their address so I can call them, and find out how they're measuring these pressures and temps. Some components designed for these purtposes are not worth a damned.
Cyl pressure max. 1300 psi and temps at no more than 1350. ...........................T.O.O. ..................................

Posted by andre on April 26, 1998 at 00:26:46:
In Reply to: T.O.O. what do you think of optrand? posted by body on April 25, 1998 at 03:40:34:

T.O.O.:

It may not have been obvious that there was a hypertext
in my message that led to optrand. Anyway, their address
and phone number is:

OPTRAND INC. 46155 Five Mile Road, Plymouth, Michigan 48170, USA
Phone: (734) 451-3480 Fax: (734) 451-2945

They make pressure sensors that use fiber optics to keep
interfering electronics out of the engine bay. They mount
either inside their own spark plug (think it's called a
PSIplug) or fit around your spark plug. They work at up
to 350 degrees celsius (660 deg F) and the different models
measure up to 100 bar or 200 bar (i.e., about 1500-3000 psi)
at those temperatures.

Thanks,
Andre

Andre