dual egt question

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Feb 25, 2008 | 02:11 PM

wmiller

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From: North East, MD

dual egt question

I have my egt prob post turbo and want to have pre turbo what kind of switch and how would i wire it so i could flip between the 2 probes. i would like to be able to put the switch in my pillar next to the gauge

Feb 25, 2008 | 05:59 PM

kawa

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From: Rogue River, OR

Don't hold me to this but I would think that you would need a double pole double throw switch and run the power wire for each probe through the switch and have a common power wire to the center pole on the switch.

Someone else will jump in and either agree or dis-agree with me.

Rog

Feb 25, 2008 | 06:06 PM

tjbeggs

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From: Silver Lake Dunes, MI

I really don't know. My gut is telling me that a switch may throw off the readings. I do know somebody makes a dual needle pyro just not sure who.

Feb 25, 2008 | 06:55 PM

cookie88

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From: Cabot, Arkansas

Quote:

Originally Posted by tjbeggs

My gut is telling me that a switch may throw off the readings.

My gut is telling me your gut is right. You can't alter the thermocouple leads, so both sets would have to be mounted to the gauge. Switched or not there would always be a mv signal from both probes.

Feb 25, 2008 | 06:59 PM

tjbeggs

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From: Silver Lake Dunes, MI

Does you gut by any chance enjoy a good prime rib, ice cream, and pizza?? Mine sure does!!

Feb 25, 2008 | 07:12 PM

kawa

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From: Rogue River, OR

I kinda agree with what both of you are saying but it also brings up the question as to why, when installing a cool down timer that timer is tied into the Pos & Neg lines from the prob to the EGT gauge. Wouldn't those taps also effect the readings from the probe to the EGT gauge???

Rog

Feb 25, 2008 | 07:16 PM

JethroF250

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Hey wes what about wiring up a pre turbo and then mounting the guage on top the dash or seein if u can get a 4 guage pillar. someone on here had a post of a post and pre turbo guage set up but i think u can do better