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fitting aftermarket EGT gauge or gauges.

Can you take reading from the original EGT's in the car. don't really want to be fitting new sensors too. want to run a duel screen digital gauge.

Pimp my ride lol....

Surely ECU manages this safely anyway. Why would you want to watch it?

for the same reason I have a wide band Air/Fuel gauge. makes it very simple to see if something is going wrong..

lost one engine, not wanting to loss another...

you can't easily take the signal from the oem egt sensors. The probes themselves are N type thermocouples, IIRC, and most of the aftermarket gauges use K type. The EMF generated by the thermocouple is very very small, you'd need an amp which placed very very very little load otherwise you'll distort the reading for the ecu and for your gauge (assuming you can find a guage set up to read N type thermocouples).

You could tap in after the conversion to duty cycle (the ecu feed) but then you'd need to build some custom electronics to convert the duty cycle back to something your gauge understands.

Another idea: buy the plx devices OBDII gauge and set it to read EGT. Take a photo of your rev counter, mail it to plx, ask them to make an EGT gauge in the same font and mail it to you. Load it in to your gauge and bingo. Assuming you've got RS6 egt sensors and assuming the OBDII gauge can pick up EGT.

Or: get a standard gauge and fit it in your downpipe. calibrate it against the ecu - probably needs +150 degrees the face value.

I'm planning on using the plx standard gauge with two sensors welded in to the manifolds.

thank you for all the info on this. very helpful.. Back to the drawing board... looks like a will just have to tap in a second set of probes to the manifold then.

you can take a tap off after the electronics box on the egt sensor, 0-5v but you need to scale that do your digital volmeter display.

can you do this doug?

yes

you have Pm doug

doug, that's what I said!

You could tap in after the conversion to duty cycle (the ecu feed) but then you'd need to build some custom electronics to convert the duty cycle back to something your gauge understands.

Just had another idea: use the rns display and cobble together a microITX motherboard with composite video out and put some nice gauges on the telly! This I may have to do....