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O2 sensor bung placement after turbo
I noticed that my Innovate Motorsports AFR gauge instruction said to install the O2 sensor 24" down from the turbo. My rarelyL8 hooligan has a bung right after the turbo, about 2" away. Will this affect the operation of the AFR gauge? I assume the bung where Brian placed it must be OK and typical or else he wouldn't have put it there. Should I get a new bung welded in further down the muffler tube or just leave as is?
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Cheers, Chris 1986 951 SOLD:  1975 Carrera / 965 tribute w/ 1989 3.3 turbo 8.5:1, custom Evergreen K27 7200, 964 cams, euro CIS, TEC1 dual plug, rarlyL8 headers & hooligan pipe.
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04-23-2018, 04:59 AM
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Banned
Join Date: Nov 2001
Location: top of 3rd
Posts: 4,336
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That's where I've got mine mounted and everything here I've ever read has confirmed such - I'd not move it.
Long as you're not mounted at the low point (moisture pool) you're good. |
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04-23-2018, 06:23 AM
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Thanks for confirming! I'll leave as is.
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Cheers, Chris 1986 951 SOLD: 1975 Carrera / 965 tribute w/ 1989 3.3 turbo 8.5:1, custom Evergreen K27 7200, 964 cams, euro CIS, TEC1 dual plug, rarlyL8 headers & hooligan pipe.
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04-23-2018, 06:55 AM
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You can get a 1" deep mounting bung that will keep the tip of the sensor out of the direct exhaust flow. However i've never used them.
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Cheers, Chris 1986 951 SOLD: 1975 Carrera / 965 tribute w/ 1989 3.3 turbo 8.5:1, custom Evergreen K27 7200, 964 cams, euro CIS, TEC1 dual plug, rarlyL8 headers & hooligan pipe.
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04-23-2018, 08:57 AM
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Mighty Meatlocker Turbo
Join Date: Apr 2016
Location: North TexASS
Posts: 18,533
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PullinMyPuddy, for what it's worth, the model of sensor that Innovate AFR meters use did not last long for me in that location (burned up and started throwing error codes within a few months of use), so I used their bung extension, that you mention above, and also made my own heat diffuser out of perforated steel that wraps around the sensor. Can't say for certain those would have been the cure, as I gave up on Innovate after repeated problems with my LM2 and have been using a PLX meter (different model of sensor with those, too) for several years without issue (with the Innovate bung extension/heat sink and my homemade diffuser).
Last edited by Rawknees'Turbo; 04-23-2018 at 09:26 AM.. |
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04-23-2018, 09:23 AM
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,125
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Yeah, you never want your bung hole too deep
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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR P & C's, 993SS cams, Borg-Warner S366 turbo @ 1.2-1.5 bar, depending on mood  , Treadstone full bay IC, 70mm TB, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MicroSquirt AMP'd w/GM smart coilpack, Bilstein coilovers, Tramont wheels (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel
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04-23-2018, 09:30 AM
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Mighty Meatlocker Turbo
Join Date: Apr 2016
Location: North TexASS
Posts: 18,533
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Quote:
 ) to JustTheTIPpy !!!
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04-23-2018, 09:31 AM
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,125
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Quote:
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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR P & C's, 993SS cams, Borg-Warner S366 turbo @ 1.2-1.5 bar, depending on mood , Treadstone full bay IC, 70mm TB, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MicroSquirt AMP'd w/GM smart coilpack, Bilstein coilovers, Tramont wheels (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel
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04-23-2018, 09:34 AM
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Mighty Meatlocker Turbo
Join Date: Apr 2016
Location: North TexASS
Posts: 18,533
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Quote:
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04-23-2018, 09:35 AM
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,125
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Quote:
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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR P & C's, 993SS cams, Borg-Warner S366 turbo @ 1.2-1.5 bar, depending on mood , Treadstone full bay IC, 70mm TB, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MicroSquirt AMP'd w/GM smart coilpack, Bilstein coilovers, Tramont wheels (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel
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04-23-2018, 09:42 AM
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There's Rawknees, he's back!
Alright, i'll use what i've got and see what happens. I'll look for a deeper bung hole if needed. Butt of course!
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Cheers, Chris 1986 951 SOLD: 1975 Carrera / 965 tribute w/ 1989 3.3 turbo 8.5:1, custom Evergreen K27 7200, 964 cams, euro CIS, TEC1 dual plug, rarlyL8 headers & hooligan pipe.
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04-23-2018, 09:46 AM
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Brando
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And consequently I also have had innovate in that spot and haven’t had much trouble with it there. My plx has taken its place in that spot and I’ve moved the innovate after the muffler only because it made more sense with wire length and such after going efi.
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Turbo powa! 1977 911s. it's cool |
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04-23-2018, 10:24 AM
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Registered
Join Date: Jul 2008
Location: Central Washington State
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I was freaked out with the possibility of cooking the sensor that close to the turbo. Yeah, Innovate offers a heat sink, which probably addresses the issue. For me, I installed a "bung hole" at the exit of the muffler, upstream from the tail pipe as far as I could get it. The only downside is that at idle one might possibly see a leaner mixture than actual due to low volume of exhaust gasses and possible mixing with atmospheric air. But who cares at idle; it's all about accurate readings with your foot to the floor.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, B&B intercooler, stock 3LDZ. |
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04-23-2018, 06:24 PM
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Mine is in a similar position in the RarelyL8 zork - about 2" behind turbo exit. The Bosch sensor has lasted several years of extreme abuse so far.
Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-) |
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04-23-2018, 07:52 PM
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911 Carrera
hoonkraft
