chaze1385 Posted December 17, 2007 Report Share Posted December 17, 2007 Installed my AUtometer EGT Gauge a few days ago. Probe in the turbine housing right after exhaust manifold flange. Part throttle crusing i get 1200-1400 degrees. WIde open 1700+. i think i need some more fuel. HAHAHA. Chad Link to comment Share on other sites More sharing options...
JHEIII874T5M Posted December 17, 2007 Report Share Posted December 17, 2007 Lean and mean. Sounds like you've got some fun tooning going on there. Keep in mind retarded timing can cause high EGTs as well. Link to comment Share on other sites More sharing options...
Che'_Moderator Posted December 17, 2007 Report Share Posted December 17, 2007 I try to keep it under 1550. I know Johann goes up to 1600, but I do not know anyone off the track pushing 1700s. Link to comment Share on other sites More sharing options...
SteveO Posted December 17, 2007 Report Share Posted December 17, 2007 I just got my VDO EGT gauge. any pics on your install? Link to comment Share on other sites More sharing options...
chaze1385 Posted December 17, 2007 Author Report Share Posted December 17, 2007 I iinstalled the gauge in the dash in the blank switch holes next to the sunroof switch. To the right of the steering column. Took a little work with the die grinder to get it to slide in there. Works good for me. I dont run any heat shields making the probe install easier. Just straight down from the top. About 1/2 inch from the exhaust manifold flange in the turbine housing.Chad Link to comment Share on other sites More sharing options...
Che'_Moderator Posted December 17, 2007 Report Share Posted December 17, 2007 I run a heatshield so I just installed it from the bottom: Link to comment Share on other sites More sharing options...
SteveO Posted December 17, 2007 Report Share Posted December 17, 2007 So where is it more accurate? Pre turbo by the exhast manifold, or post turbo by the dp flange.THX Link to comment Share on other sites More sharing options...
Che'_Moderator Posted December 17, 2007 Report Share Posted December 17, 2007 So where is it more accurate? Pre turbo by the exhast manifold, or post turbo by the dp flange.THX5 probes one on each runner run to a slaved gauge with an over temp alert. 500 dollars in probes and a 600 dollar gauge are not practical for the street though. So I go post turbo on street cars. That why when a prob fails it does not take out your turbo. Link to comment Share on other sites More sharing options...
stick70 Posted December 17, 2007 Report Share Posted December 17, 2007 5 probes one on each runner run to a slaved gauge with an over temp alert. 500 dollars in probes and a 600 dollar gauge are not practical for the street though. So I go post turbo on street cars. That why when a prob fails it does not take out your turbo.it would still be better in the exhaust housing though opposed to in the front of the downpipe though right? Link to comment Share on other sites More sharing options...
Che'_Moderator Posted December 17, 2007 Report Share Posted December 17, 2007 it would still be better in the exhaust housing though opposed to in the front of the downpipe though right?Not really. You will destroy the turbo when the probe fails and the reading is basically the same. Link to comment Share on other sites More sharing options...
Tadek Posted December 17, 2007 Report Share Posted December 17, 2007 Not really. You will destroy the turbo when the probe fails and the reading is basically the same.What exactly does "basically the same" mean? I mean, without really having done this on a Volvo if you tune for max power, you will probably head for AFRs around 12-12,5 if EGTs and detonation threshold allow this. Depending on what turbo you have, 900, 950 or even 980°C might be the possible limit of the used materials. The difference of placing the probe before or after the turbine can decide whether the parts will stand the thermal stress or not. I do not know the pressure ratios at the turbine, but considering the polytropic expansion at the turbine the temperature difference will not be negligible.Maybe my point of view is too theoretical, in this case please feel free to correct me. Link to comment Share on other sites More sharing options...
Che'_Moderator Posted December 17, 2007 Report Share Posted December 17, 2007 What exactly does "basically the same" mean? I mean, without really having done this on a Volvo if you tune for max power, you will probably head for AFRs around 12-12,5 if EGTs and detonation threshold allow this. Depending on what turbo you have, 900, 950 or even 980°C might be the possible limit of the used materials. The difference of placing the probe before or after the turbine can decide whether the parts will stand the thermal stress or not. I do not know the pressure ratios at the turbine, but considering the polytropic expansion at the turbine the temperature difference will not be negligible.Maybe my point of view is too theoretical, in this case please feel free to correct me.In every case I have seen less than 100 degrees difference. Thats F not C. So IMO not worth damaging the wheel when the probe fails. If you are tuning to the point of material limits you should be tuning individual cylinders which again means 5 probes. Link to comment Share on other sites More sharing options...
skeet2121 Posted December 18, 2007 Report Share Posted December 18, 2007 I am confused on the probe failing resulting in your turbo being damaged. Just ordered a EGT and dont want to ruin anything..... Link to comment Share on other sites More sharing options...
Fudge_Brownie Posted December 18, 2007 Report Share Posted December 18, 2007 I am confused on the probe failing resulting in your turbo being damaged. Just ordered a EGT and dont want to ruin anything.....If a part of the probe comes off, it'll get shot through your turbo, destroying the turbine wheel. Link to comment Share on other sites More sharing options...
Che'_Moderator Posted December 18, 2007 Report Share Posted December 18, 2007 K-probes inconel hastalloy whatever all can and do fail. The last thing you want is a chunk of hardened steel flung at your turbo when its at high RPM. Link to comment Share on other sites More sharing options...
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