Slater Posted June 14, 2005 Report Share Posted June 14, 2005 I know the placement of an EGT probe has a huge effect on it's readings.I know the best place is in the exhaust manifold, but I am considering putting it in the very top of the downipe right at the turbine outlet because if anything happened to the sensor it woudln't destroy my turbo.What temps would be considered normal for a probe mounted in the manifold?What temps would be considered normal for a probe mounted in the downpipe?What MAX temps would I see for a probe mounted in the manifold?What MAX temps would I see for a probe mounted in the downpipe? Link to comment Share on other sites More sharing options...
Zappo Posted June 14, 2005 Report Share Posted June 14, 2005 Good questions. I will have my EGT in soon and would like to know the same thing. I have mine mounted in the down pipe just after the turbo. Don't have the down pipe in yet though. Link to comment Share on other sites More sharing options...
Guest DougK Posted June 14, 2005 Report Share Posted June 14, 2005 The reason I dislike EGT's is this very reason. On my 242 I had it about 3" back from the outlet of the turbo yet at WOT I'd BURY the gauge. Wideband would say 11:1 so I pretty much ignored it.A dying cat will really increase EGT's as well... yadda yadda yadda. Link to comment Share on other sites More sharing options...
StickThatClutch Posted June 14, 2005 Report Share Posted June 14, 2005 It also depends on your setup. Lots of boost vs. low boost vs. no boost will want to see different EGT values. Link to comment Share on other sites More sharing options...
boostjunkie Posted June 14, 2005 Report Share Posted June 14, 2005 My probe is mounted about 2" post turbo on the downpipe.I see temps that go something like thisIdle- 600-700Cruise- 1000-1200WOT- 1400 after about 15 sec of WOT Link to comment Share on other sites More sharing options...
Johann Posted June 14, 2005 Report Share Posted June 14, 2005 In the flange against turbine.A/F 12-12.5Cruising near 1150-1200.WOT little over 1450-1550 at longer duration. Reached 1650 when A/F was close to 13 at 6500 RPM. Link to comment Share on other sites More sharing options...
lax01 Posted June 14, 2005 Report Share Posted June 14, 2005 My probe is mounted about 2" post turbo on the downpipe.I see temps that go something like thisIdle- 600-700Cruise- 1000-1200WOT- 1400 after about 15 sec of WOT←2nd...almost exactly how mine reacts....I took out the EGT sensor this weekend cuz I took the downpipe off...I really don't see how one of those could break...its pretty solid... Link to comment Share on other sites More sharing options...
Johann Posted June 14, 2005 Report Share Posted June 14, 2005 The reason I dislike EGT's is this very reason. On my 242 I had it about 3" back from the outlet of the turbo yet at WOT I'd BURY the gauge. Wideband would say 11:1 so I pretty much ignored it.A dying cat will really increase EGT's as well... yadda yadda yadda.←Gauge went to 1100? :lol: Link to comment Share on other sites More sharing options...
Guest DougK Posted June 14, 2005 Report Share Posted June 14, 2005 Gauge went to 1100? ←I dont know why they didn't just make 10 hotter it'd bury that one. Link to comment Share on other sites More sharing options...
Slater Posted June 14, 2005 Author Report Share Posted June 14, 2005 It also depends on your setup. Lots of boost vs. low boost vs. no boost will want to see different EGT values.←But the point is that I COULD see max temps of 1650+ in the downpipe, right? That means the turbine housing and manifold is probably hotter than that, correct? Link to comment Share on other sites More sharing options...
theunderlord Posted June 14, 2005 Report Share Posted June 14, 2005 But the point is that I COULD see max temps of 1650+ in the downpipe, right? That means the turbine housing and manifold is probably hotter than that, correct?←Aluminum — Melting Point: 660.37 °C (933.52 °K, 1220.666 °F)According to http://www.chemicalelements.com/elements/al.html Link to comment Share on other sites More sharing options...
Johann Posted June 14, 2005 Report Share Posted June 14, 2005 Aluminum — Melting Point: 660.37 °C (933.52 °K, 1220.666 °F)According to http://www.chemicalelements.com/elements/al.html←I think the temps are higher where they exit the turbine.The new R manifold were made for temps as high as 2000 F ... Link to comment Share on other sites More sharing options...
theunderlord Posted June 14, 2005 Report Share Posted June 14, 2005 I think the temps are higher where they exit the turbine.The new R manifold were made for temps as high as 2000 F ...←FWIW.. In diesel tuning, thats why we pushed EGT gauges so hard, was the relatively low melting point of AL.. I couldn't even get near 1200* In my Cummins, even at WOT uphill, doin 80....When I rode in boostjunkies car, and saw the EGT needle go sky high, I was like, holy crap that's hot!and I had my EGT probe in my truck PRE-TURBO... :o Link to comment Share on other sites More sharing options...
Slater Posted June 14, 2005 Author Report Share Posted June 14, 2005 Aluminum — Melting Point: 660.37 °C (933.52 °K, 1220.666 °F)According to http://www.chemicalelements.com/elements/al.html←Yeah, alum melts at 1200. And the turbine housing is cast iron.Are you saying the 1650 temps people were seeing are not accurate? Link to comment Share on other sites More sharing options...
theunderlord Posted June 14, 2005 Report Share Posted June 14, 2005 Yeah, alum melts at 1200. And the turbine housing is cast iron.Are you saying the 1650 temps people were seeing are not accurate?←no... not at all.. just thinking that if POST turbo temps are 1650, imagine what it is PRE turbo.. :o Link to comment Share on other sites More sharing options...
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