I just bought a used Bassani catted x-pipe off a wrecked 2003 cobra and when I got it there was only 3 O2 sensor holes. Ther are the two behind each of the cats and one on the driver side where it bolts to the exhaust manifold. But my problem is I dont have one on the passenger side at all. The thing I don't understand is why there is only three, and how the guy that first owned it before me ran it. Thanks for all the help.
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2004 Cobra: Screaming Yellow (1600 miles)
1969 Cougar Eliminator: 427 side oiler
1966 Fairlane Country Squire: 427 side oiler
1966 Fairlane GT/A: 390 HI-PO
1965 Mustang Fastback: 289 HI-PO
1961 Starliner: 390 HI-PO
1936 Ford Coupe: Flathead
1936 Ford Club Cabriolet: Flathead
1979 Pontiac Trans-am
1955 Ford Thunderbird
2 bungs before or after the cats? you gotta run the 2 o2's before the cat, as evil twin stated the third bung is used for wideband and rear o2's turned off.
Can't you just delete the rear O2's in the tune? Then you can use the third bung for a wideband.
Can you use the wide band sensor so far back in the pipe? after the cats? I ask because I just bought a wideband and I was going to have a bung welded in closer to the exhaust manifold, probably right behind one of the OEM O2 bungs near the manifold. Is that not required?
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03 Cobra
With nothing but UPR CAI & Flowmaster Catback - 411 hp / 388 ft/lb.
Stieg stage IV port, 2.76 Billetflow with four idlers, LFP heat exchanger, tune - 486 hp / 470 ft/lb.
19cc diamond pistons, mafia, twin GT pumps, dual FPDM, 26 spline, spec 3+, pro 5.0 shifter, Bassani cat'd X, Borla Stingers, DynoJet wideband, speedhut gauges with speed of sound pods.
17x10.5
Lowered
IRS brace after cracked diff cover.
I did a little googling on this and you don't want the wideband installed after the cats. The readings will be leaner and also there's a delay with it been so far downstream of the OEM o2s but the manifold so if you're data logging what you log will be delayed from what the ECC is getting off of it's o2s up by the manifold.
Everything I've read says don't install your wideband sensor after the cats and try to put it as close to the OEM O2 sensors up by the manifold as you can.
I did a little googling on this and you don't want the wideband installed after the cats. The readings will be leaner and also there's a delay with it been so far downstream of the OEM o2s but the manifold so if you're data logging what you log will be delayed from what the ECC is getting off of it's o2s up by the manifold.
Everything I've read says don't install your wideband sensor after the cats and try to put it as close to the OEM O2 sensors up by the manifold as you can.
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