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Wideband AFR on the 930
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1987 930 -Guards Red 2001 740I sport Blk 2011 F-150 supercrew Blk 2014 X3 2.8 white "What goes around comes around..." |
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02-15-2007, 02:13 PM
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Registered User
Join Date: Mar 2002
Posts: 3,563
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The manufacturer recommends the O2 sensor is located approx 6" downstream from the turbocharger's discharge. If it's too close, the sensor could prematurely fail or give inaccurate readings. It should be after the turbo though, not before it on the header somewhere.
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition 
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02-15-2007, 02:25 PM
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A fellow Pelacanite
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911rudy fitted his after the muffler as it was overheating before it.
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG. Fitting - New service kit. Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head. 1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods. Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit. http://www.danasoft.com/sig/Iamnotanumber.jpg |
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02-15-2007, 03:19 PM
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Join Date: Mar 2002
Posts: 3,563
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Yup, I'll be fitting my LC-1 sensor after the muffler too, but as far away from tail-pipe opening as possible.
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
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02-15-2007, 03:40 PM
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Crotchety Old Bastard
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I know a couple of people with them permanently installed. One has been in for 3 years. Both have the O2 bung directly after the muffler.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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02-15-2007, 06:08 PM
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Registered User
Join Date: May 2002
Location: Up North
Posts: 1,434
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Mine is ~4" after the turbo. But then I don't have a muffler
 When I was using a Borla muffler, the sensor was mounted right after the muffler (not enough room between turbo & muffler). It worked except at idle where it will read O2 basically. I have mine for 3-4 years now. Still on the same sensor. And mine is permanently mounted.
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87 930 K27HFS/B&B/Twin-Plug... Megasquirted 
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02-15-2007, 06:22 PM
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I have O2 sensor between the turbo and the muffler and getting accurate readings, I have also installed a heat shield. I have had no problems yet. I permanently installed the LC-1 and the AFR gauge is where the clock used to be. (Originally a Carrera Non turbo). If I had to do it again I would get the LM-1 over the LC-1/XD-16 combo.
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Phil 2005 GT3 Milltek Exhaust/ECU reflashed/OEM Short shift 1988 911 coupe (GP white) Turbocharged 1998 BMW 328i |
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02-16-2007, 06:43 AM
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930
Boxster
740I Sport
78 Porsche 911SC 3.0L, 3.3Turbo soon. 
