Kristian_Wraae Posted April 30, 2013 Share Posted April 30, 2013 I'm going to tap my manifold for an EGT probe. I have found no pictures but a few threads about it. So if someone has a few pictures of where exactly to tap it. Also how thick is the stock cast exhaust manifold? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 1, 2013 Share Posted May 1, 2013 Number one runner, as close to the head flange as possible. Manifold material is about 4mm thick, assuming stock T setup. Tap 1/8 BSP for most common probe adaptors, but check first! I've done dozens and made up some special tooling to make it easier. Like a long tap extension. Quote Link to comment Share on other sites More sharing options...
Kristian_Wraae Posted May 1, 2013 Author Share Posted May 1, 2013 Do you by any chance have a picture? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 1, 2013 Share Posted May 1, 2013 I don't think I have, no, sorry. Quote Link to comment Share on other sites More sharing options...
Kristian_Wraae Posted May 11, 2013 Author Share Posted May 11, 2013 I need to know a little more about where to tap it. Do you tap it at an angle and in front of the first upper exhaust stud? Outside the heatshield ? Or do you remove the heatshield and tap it straight down to the rear of the first upper exhaust stud? If it is in front of the first exhaust stud I guess Í need to place probe at an angle (like 45 degrees - down and pointing back and towards the intake side). Then it should be possible to tap it by only removing the y-pipe going to the intercooler and keep the heatshield in place. What do you think? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 11, 2013 Share Posted May 11, 2013 You cut a section of the heat shield away, and drill straight down, about 12 mm in towards the RH wing side of the car, (so you leave enough space to get the adaptor in, with a socket on it). The probe is vertical, then bend the lead at a gentle angle, and coil any surplus up in a loop no LESS than 6 inch diameter. Quote Link to comment Share on other sites More sharing options...
Marco79 Posted May 11, 2013 Share Posted May 11, 2013 Number one runner, as close to the head flange as possible. Manifold material is about 4mm thick, assuming stock T setup. Tap 1/8 BSP for most common probe adaptors, but check first! I've done dozens and made up some special tooling to make it easier. Like a long tap extension. Sorry to jump in on your thread but I'm looking at doing this on a single manifold and thought best place was in no6? Is it different for stock? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 11, 2013 Share Posted May 11, 2013 Given free choice the BEST place is at the confluence of all six runners, just before the turbo itself. Quote Link to comment Share on other sites More sharing options...
Marco79 Posted May 11, 2013 Share Posted May 11, 2013 Given free choice the BEST place is at the confluence of all six runners, just before the turbo itself. Ok cool thanks mate I just thought no6 as its generally the hottest of the lot. Will have a look at my manifold and see if that possible Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 11, 2013 Share Posted May 11, 2013 You could drill and tap the turbine housing itself and put an Inconel probe in there. You MUST use an Inconel probe before the turbo, as the heat can soften stainless steel ones and the tip can fall off and go through the turbo, ruining it. Quote Link to comment Share on other sites More sharing options...
Kristian_Wraae Posted May 11, 2013 Author Share Posted May 11, 2013 I saw some inconel probe with an exposed tip. Is that as safe as the inconel ones without exposed tip? Quote Link to comment Share on other sites More sharing options...
Marco79 Posted May 11, 2013 Share Posted May 11, 2013 You could drill and tap the turbine housing itself and put an Inconel probe in there. You MUST use an Inconel probe before the turbo, as the heat can soften stainless steel ones and the tip can fall off and go through the turbo, ruining it. Thanks mate do you have a recomended source for such a probe? Quote Link to comment Share on other sites More sharing options...
Kristian_Wraae Posted May 11, 2013 Author Share Posted May 11, 2013 Is this where you mean? (the red cross) Quote Link to comment Share on other sites More sharing options...
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