bsh Posted December 29, 2021 Report Share Posted December 29, 2021 Hi, I am runnig several PLX EGT modules and output the 0-5v to my ecu. The egt probes wires goes through the firewall to the PLX modules built in connector. I would like to have a connector at the firewall (engine side) and wonder if it is ok that I cut the egt cable and put a regular connector on it? Some says it is ok as long as the connection have the same temperature, which it have. Some says it will ruin the accuracy... Anyone have experience with this? Thanks Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 29, 2021 Report Share Posted December 29, 2021 You would have a junction on the outside of the firewall where the TC wire crimps to the dis-similar metal connector pin, then another similar junction inside the firewall where the socket crimps to the TC wire running to the amp. The error generated will be proportional to the temperature difference between these two juctions. It is hard to guess how significant that would be but my guess is probably less than 30°C error at worst. I have used these type of connectors for EGT's on the firewall of a drag car before: https://www.servotech.co.nz/products/marlin-connectors/mini-strip-panels/ Quote Link to comment Share on other sites More sharing options...
bsh Posted December 30, 2021 Author Report Share Posted December 30, 2021 23 hours ago, Adamw said: You would have a junction on the outside of the firewall where the TC wire crimps to the dis-similar metal connector pin, then another similar junction inside the firewall where the socket crimps to the TC wire running to the amp. The error generated will be proportional to the temperature difference between these two juctions. It is hard to guess how significant that would be but my guess is probably less than 30°C error at worst. I have used these type of connectors for EGT's on the firewall of a drag car before: https://www.servotech.co.nz/products/marlin-connectors/mini-strip-panels/ Thanks Maybe I formulated myself bad, but I think to have both sides of the connector in the engine bay, so both female and male connector see the same temperature. Or do you think it will show wrong temp anyway? Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 30, 2021 Report Share Posted December 30, 2021 My understanding is if there are two dis-similar junctions using the same materials on opposite sides and they are both at the same temp the the errors from each will cancel each other out. Quote Link to comment Share on other sites More sharing options...
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