Dale B Posted October 29, 2004 Share Posted October 29, 2004 Ive got my car in with the local "expert" solving a few problems Ive got atm. When he looked under the bonnet he told me that the EGT sensor isnt located in the correct place. At the moment its in the exhaust manifold adjacent to 6 cylinder, he says it should be after the turbo so that it read a more even temperature (ie all 6 cylinders rather than just pot 6). Is this chappy right or what??? Link to comment Share on other sites More sharing options...
JohnK Posted October 29, 2004 Share Posted October 29, 2004 Keep it where it is, its the best place to monitor your peek EGT's, placing it after the turbos tells you nothing useful. Link to comment Share on other sites More sharing options...
Guest Terry S Posted October 29, 2004 Share Posted October 29, 2004 but is safer for the turbo/s. Whoever fitted it originally has done nothing wrong though. The reading difference pre/post turbo will be circa 200c different, so your expert has it the wrong way around. Basically no he is not correct. Link to comment Share on other sites More sharing options...
Dale B Posted October 29, 2004 Author Share Posted October 29, 2004 Been onto said bloke and he said that at the moment with it being only an inch or so away from No.6 cylinder the sensor is only picking up temp's from that cylinder not an even range temp of the exhaust gasses. ??? Being a dumbass noob to all this lark Im not sure whether it should be moved or not now The initail problem was that the EGT gauge started lighting up at 900 C recently, it used to max out at 850 before, I know this could be because its lean or fuel probs etc, which is why Its with this guy to start with. Will it cause problems if it does get moved? or jus an inaccurate reading. Anyone got a diagram I could see and then show him (its a Greddy Gauge (not sure if that makes a difference) Link to comment Share on other sites More sharing options...
Soonto_HAS_soop Posted October 29, 2004 Share Posted October 29, 2004 DO NOT MOVE THE SENSOR!! To me it would seem that your "expert" does not want to sort the fueling to get the temps down, but just move the sensor to a cooler area and therefore solve your higher temps issue. IIRC runner 6 is the best runner to have it in, as this cylidner tends to get the hottest as it is surrounded by the bulkhead. Ben.. Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 29, 2004 Share Posted October 29, 2004 EGT probes shouls be as near to the exhaust valves as possible. I prefer to put one in the port runner itself and effectively monitor only one cylinder. In testing an engine manufacturer with an effectively limitless budget, in comparison to a home tuner, would probe each port and also have special spark plugs measuring in cylinder gas temps and in cylinder gas pressure gradients. The further you get from the combustion chamber the more thermal lag you see and the less accurate the actual reading becomes. After the turbos the readings are prety meaningless. As Terry says though, should a thrmocouple fail mechanically (tip vibrate and break off, or melt) then the turbine side of the turbos probably won't end up eatig it, but it's a risk you probably *HAVE* to take for sensible readings to be given. Link to comment Share on other sites More sharing options...
Red Posted October 29, 2004 Share Posted October 29, 2004 Sorry to hijack the thread!!! Chris - did you get my email about booking my car in with you on the 5th????? cheers dude, Phil. Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 29, 2004 Share Posted October 29, 2004 Originally posted by Red Sorry to hijack the thread!!! Chris - did you get my email about booking my car in with you on the 5th????? cheers dude, Phil. I did, you can, but I will reply again in a moment, directly to you. Link to comment Share on other sites More sharing options...
foodfreak Posted October 29, 2004 Share Posted October 29, 2004 egt probe tips can and DO break........ mine did, bye bye no.1 turbo John Link to comment Share on other sites More sharing options...
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