From: "Willem-Jan Markerink" To: landcruisers@tlca.org, dtlc@helios.net, 80_series@sgiblab.sgi.com Date sent: Mon, 10 Apr 2000 17:44:01 +0100 Subject: [80] Pyrometer expertise needed! Send reply to: 80_series@sgiblab.sgi.com Dear gang, My shop is currently fixing a leaking exhaust-header gasket on our HDJ-80 (and replacing radiator plus mounting snorkel), so while having full access to that side of the engine/exhaust, I wanted to prepare the mounting of a pyrometer. My shop says the most common connection is a 1/8" MPT threaded, but after checking with VDO-Kienzle, they mention a metal shaft/bushing of 'R1/4', presumably 1/4" or about 8mm, quite a bit larger than my shop is willing to drill into the header.... VDO quoted a price of US$300, with analog gauge, 52mm diameter, up to 900C (1652F)....I thought I had seen better prices in the past. Btw, my shop also says that mounting it upstream of the turbo is best, downstream might be more than 120C different....and his trick to drill without risking the turbine with metal flakes is to clog the drill bit with grease, so all flakes stick to the drill bit....he also said that the risk wasn't that high to begin with, unless one would drill with a turbine at high speed....at idle, the metal couldn't do much harm (assuming (uhoh) that it gets passed through the turbo, and not stay there). Any comments on all this? Thanx a bunch! -- Bye, Willem-Jan Markerink The desire to understand is sometimes far less intelligent than the inability to understand [note: 'a-one' & 'en-el'!] From: "Wilander, Ronald E" To: "'80_series@sgiblab.sgi.com'" <80_series@sgiblab.sgi.com> Subject: RE: [80] Pyrometer expertise needed! Date sent: Mon, 10 Apr 2000 11:39:19 -0700 Send reply to: 80_series@sgiblab.sgi.com > From: Willem-Jan Markerink[SMTP:w.j.markerink@a1.nl] > > Dear gang, > > My shop is currently fixing a leaking exhaust-header gasket on our > HDJ-80 (and replacing radiator plus mounting snorkel), so while > having full access to that side of the engine/exhaust, I wanted to > prepare the mounting of a pyrometer. > My shop says the most common connection is a 1/8" MPT threaded, but after > checking with VDO-Kienzle, they mention a metal shaft/bushing of 'R1/4', > presumably 1/4" or about 8mm, quite a bit larger than my shop is willing to > drill into the header.... VDO quoted a price of US$300, with analog gauge, > 52mm diameter, up to 900C (1652F)....I thought I had seen better prices in the > past. Btw, my shop also says that mounting it upstream of the turbo is best, > downstream might be more than 120C different....and his trick to drill without > risking the turbine with metal flakes is to clog the drill bit with grease, so > all flakes stick to the drill bit....he also said that the risk wasn't that > high to begin with, unless one would drill with a turbine at high speed....at > idle, the metal couldn't do much harm (assuming (uhoh) that it gets passed > through the turbo, and not stay there). > > Any comments on all this? > Thanx a bunch! Willem-Jan, I strongly suggest emailing "gadget", who is an extremely knowledgeable guy about automobiles in general, and in particular about his highly modified 4Runner. If you go to his website and go to the area called "gauges", he gives a rundown on what he's installed. He's a pilot and wanted EGT gauges (similar to aircraft) in his TRD supercharged 4Runner. Just looking quickly, I didn't see the details about the header/thermocouple installation, but he does recommend a particular type of gauge to use. Here's his website: http://www.gadgetonline.com/ Gadget's email address is: gadget@olg.com or gadget@gadgetonline.com (Try both, I think one is old). and here's the Westech gauge website. Note the "Dual" and "Triple" EGT models near the bottom of the page. http://www.westach.com/products.htm#AUTOMOTIVE and finally, here's the 4Runner forum that is quite popular and one of the more informative ones I've seen. I know yours is a turbo charger on an LC, but super charging issues on the 4Runner may be similar, and there's lots of discussion about that on this forum. Try the archives, too. Ron Ron Wilander Boeing Payloads Engineering, Emergency & Miscellaneous Equipment 425-294-3420 desk, 425-294-4366 FAX ronald.e.wilander@boeing.com Mail Stop 0R-HK, Building 45-80 (Bomarc) From: "Dilber Sraon" To: 80_series@sgiblab.sgi.com Subject: RE: [80] Pyrometer expertise needed! Date sent: Mon, 10 Apr 2000 14:42:07 PDT Send reply to: 80_series@sgiblab.sgi.com >From: "Wilander, Ronald E" >Reply-To: 80_series@sgiblab.sgi.com >To: "'80_series@sgiblab.sgi.com'" <80_series@sgiblab.sgi.com> >Subject: RE: [80] Pyrometer expertise needed! >Date: Mon, 10 Apr 2000 11:39:19 -0700 > >Willem-Jan, > >I strongly suggest emailing "gadget", who is an extremely knowledgeable guy >about automobiles in general, and in particular about his highly modified >4Runner. If you go to his website and go to the area called "gauges", he gives >a rundown on what he's installed. He's a pilot and wanted EGT gauges (similar >to aircraft) in his TRD supercharged 4Runner. Just looking quickly, I didn't >see the details about the header/thermocouple installation, but he does >recommend a particular type of gauge to use. > >Here's his website: >http://www.gadgetonline.com/ > >Gadget's email address is: gadget@olg.com or gadget@gadgetonline.com (Try >both, I think one is old). > >and here's the Westech gauge website. Note the "Dual" and "Triple" EGT >models near the bottom of the page. >http://www.westach.com/products.htm#AUTOMOTIVE > >and finally, here's the 4Runner forum that is quite popular and one of the more >informative ones I've seen. I know yours is a turbo charger on an LC, but super >charging issues on the 4Runner may be similar, and there's lots of discussion >about that on this forum. Try the archives, too. > >Ron >Ron Wilander >Boeing Payloads Engineering, Emergency & Miscellaneous Equipment >425-294-3420 desk, 425-294-4366 FAX >ronald.e.wilander@boeing.com >Mail Stop 0R-HK, Building 45-80 (Bomarc) > I had installed 2 2/16 inch (52mm) autometer turbo boost guage and EGT guage. The guages and appropriate lines and probe cost only $260 US for the parts only. I understand from Gadget that you want to place the probe (TIT) before the turbo for a turbo inlet temperature reading. Understanding your metal shaving problem vs. pulling out your headers and then placing the probe. Mine was placed soon after the turbo due to the above considerations, with good readings at WOT. Possibly reading 150 F cooler at normal cruising and even less diference at full boost due the gases flowing so quickly through the pipes. I may have confused the issue more. Anyway the autometer guages work and look great and cost less. Hope this helps. Dilber From: "Ian B" To: <80_series@sgiblab.sgi.com>, "DTLC" Subject: Re: [80] Pyrometer expertise needed! Date sent: Tue, 11 Apr 2000 21:57:45 +0930 Send reply to: 80_series@sgiblab.sgi.com From: Willem-Jan Markerink : Dear gang, : : My shop is currently fixing a leaking exhaust-header gasket on our : HDJ-80 (and replacing radiator plus mounting snorkel), so while : having full access to that side of the engine/exhaust, I wanted to : prepare the mounting of a pyrometer. : My shop says the most common connection is a 1/8" MPT threaded, but after : checking with VDO-Kienzle, they mention a metal shaft/bushing of : 'R1/4', presumably 1/4" or about 8mm, quite a bit larger than my shop : is willing to drill into the header.... : VDO quoted a price of US$300, with analog gauge, 52mm diameter, up to : 900C (1652F)....I thought I had seen better prices in the past. : Btw, my shop also says that mounting it upstream of the turbo is : best, downstream might be more than 120C different....and his trick : to drill without risking the turbine with metal flakes is to clog the : drill bit with grease, so all flakes stick to the drill bit....he : also said that the risk wasn't that high to begin with, unless one : would drill with a turbine at high speed....at idle, the metal : couldn't do much harm (assuming (uhoh) that it gets passed through : the turbo, and not stay there). : : Any comments on all this? : Thanx a bunch! Willem, I have an ISSPRO pyro' (R607VW) that I bought for US$127 www.dieselpage.com/iss25.htm ). It came complete with necessary hardware to weld to the exhaust and wiring. It is in degrees F though, although this hasn't really proved to be an issue. I have mine mounted downstream of the turbo and allow 'around' 200F temp drop across the turbo, although I think the temp is pretty stable pre-post turbo after 1/2 an hour or so. I would have concerns about mounting it in the exhaust manifold due to the concentration of heat and the cast iron surviving long term where it is drilled. hth, Ian B 93 GXL HZJ80 Alice Springs, Australia http://www.geocities.com/hzj80