Originally posted by FTI:
quote:
Originally posted by imakehp:
This is kinda related to this discussion, so I'm asking what pressure is going through the cooler lines on a glide?
Pressure in the cooler lines is "charge pressure" also known as "converter charge pressure". Fluid travels into the converter, goes through the converter(where most of the heat in a properly built transmission is made) and then travels through the pump/case to the cooler lines/cooler and back into the transmission.
Charge/converter pressure DOES effect how a converter behaves. The general rule of thumb of less pressure=looser converter and more pressure=tighter converter. This is popular with turbo guys because we have to play a balancing act with the converter between spool times(being loose enough) and converter efficiency down track(being tight enough). By using a dump valve and electronically manipulating charge pressure we can make playing that balancing act easier.
And yes I have seen bracket racers use it is varying situations as well. Once must also keep in mind that the dump valve is not an end all be all fix to a converter being set correctly for the car. Its best used as I described it above for turbo applications or as a fine tuning tool on the fly until the converter can be properly adjusted.
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Sorry got a little side tracked there with the charge pressure and dumps. back to the main question; the reason I prioritize charge pressure over line pressure is logging line pressure is only going to serve as a premonition to a transmission issue that will most likely lead to some sort of service anyway. And for myself, if I'm pulling a transmission for a suspected issue, I'm going to go through the entire unit while its out to be safe. Where If I'm logging charge pressure I can see how charge pressure goes up and down. and correlate that to how consistent the car is or isn't, no different than tracking DA, humidity, wind speed/direction, track conditions or anything else that might effect the cars consistency.
to be clear this is
MY preference. Others are welcome to establish a preference of their own. There is no right or wrong way. I offered my own reasoning behind my decision so that others can make their own educated decisions.
-Dalton
