In Chamber Testing

NoDOHC · 07-09-2010, 08:47 PM

The awesomeness of pressure transducer curves is not the math, but that ability to compare curve to curve what improvement was seen by the changes that you just made.

The numbers might not be right, but you really only need to see the 270 degree power stroke to compare the power that you are making at each new setting. The other three should be basically the same at different AFRs and ignition timing settings.

The pressure transducer does not substitute for the dyno, it only allows deeper insight into what the cycle is doing and what adjustments can be safely made.

You are correct about the entire cycle requiring three transducers, but I really don't think that anyone cares about the intake and exhaust stroke, and the end of the compression stroke (all that really matters) is able to be observed. (You might be able to observe the pressure on the intake stroke in the oil injection hole).

RICE RACING · 07-09-2010, 09:21 PM

This is what I use > http://www.picoauto.com/applications/trium.html

I long ago stopped posting important "current stuff" on the interweb as too many people copied it!.

Anyway I went with picoscope and use it for pretty much everything (actuators and sensors), the amount of stuff you can do with it is only limited by your imagination. Use by lots of OEM big manufacturers too, as In above link.

07-09-2010, 08:47 PM	#1
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 18	The awesomeness of pressure transducer curves is not the math, but that ability to compare curve to curve what improvement was seen by the changes that you just made. The numbers might not be right, but you really only need to see the 270 degree power stroke to compare the power that you are making at each new setting. The other three should be basically the same at different AFRs and ignition timing settings. The pressure transducer does not substitute for the dyno, it only allows deeper insight into what the cycle is doing and what adjustments can be safely made. You are correct about the entire cycle requiring three transducers, but I really don't think that anyone cares about the intake and exhaust stroke, and the end of the compression stroke (all that really matters) is able to be observed. (You might be able to observe the pressure on the intake stroke in the oil injection hole). __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)

07-09-2010, 09:21 PM	#2
RICE RACING Don Mega Join Date: Dec 2008 Location: Utopia Posts: 1,688 Rep Power: 18	This is what I use > http://www.picoauto.com/applications/trium.html I long ago stopped posting important "current stuff" on the interweb as too many people copied it!. Anyway I went with picoscope and use it for pretty much everything (actuators and sensors), the amount of stuff you can do with it is only limited by your imagination. Use by lots of OEM big manufacturers too, as In above link. __________________ www.riceracing.com.au Worlds best Apex Seals Coil on Plug Water Injection ECU Calibration