I'm putting shorty headman headers on my 355 soon and I was wondering if it is even possible to use a regular O2 sensor... or will I have to get a heated O2 sensor for sure! If anybody is running headers with a regular O2 sensor please let me know!

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1986 Trans AM
305 TPI
Well over 200,000+ miles (speedo/odometer non-funtional! Odometer reads 142,000)
4 Wheel Discs
9 bolt Borg Warner Rear (2.77's....oh joy) :P
Completely Stock
Current Project: upgrade to a 355 TPI, 6" rods, 9.5:1 Compression, Stock TPI ported, 24#/hr LTI injectors, Hedman Shorty Headers, SBC Stock Casting heads pocket ported, Comp Cams XE262-14 TPI Cam, Ed Wright Fast Chip, Holley AFPR, TPIS airfoil, MSD wires, MSD 6-AL Box, proform hot coil!!

 

When I put a 355 in my old Trans Am, I put the same 02 sensor in the Hookers as was in my original Manifolds.

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89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

 

I did the same thing!!!!

 

Same here, no problems.
bsa

 

Hi!

I have SLP 1 3/4 Headers, I used a new stock O2 sensor, don't seem to have any problems!

Ken

 

Edelbrock TES and a regular Bosch sensor works like a champ!

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Red '85 MPFI V-6 T-5 Sport Coupe (bought new),now an IROC in sheeps clothing.
Rebuilt and installed '88 IROC L-98 TPI,700-R4,3.27 posi/disk rear,instrumentation, steering gear, and all suspension parts (even the wonder bar)
Mods:
IROC wheels, Hi-perf. rebuild on 700-R4,TCI sizzler torque conv.,B&M megashifter, L-98 .030 over,balanced,decked,blueprinted, SR Torquers, KB pistons,9.1:1 CR, port matched stock TPI, comp cams .450/480 206/210 cam, all free mods, subframe connectors, Edelbrock TES/jet hot coated, CATCO cat, Hooker catback, MSD 6A, airfoil, AFPR, K&Ns, polygraphite bushings all around, 1989 IROC memcal in summer, ARAP memcal in winter.

 

Same here!

 

I used the same O2 sensor off my manifolds on my SLP headers. I used to get SES light with a rich exhaust code haven't gotten a code since putting the headers in.

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'91 Z28 305, Auto trans, K&N filters, TPIS air foil, power pulleys, ported plenum, hypertech chip, hooker cat back, kyb shocks, STB, SLP 1 5/8" headers, catco 3" cat, 14.7@ 93 mph.

 

I use the stock single wire stock O2 sensor on mine. No problems here either.

I suggest buying a new one while you have it out. They are about $18.

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'94 Corvette Admiral Blue
-==ICON Motorsports==-
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'91 Z28 Blue/Silver ZZ4/ZF6
335.9 rwhp 374.9 rwtorque

 

as long as your cat isnt punched out, you shouldn't have a problem running a single wire O2 sensor. if you cat is punched or just not there, buy a heated one.

 

I'm using a single wire Bosch as well without problems.

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Black 88 GTA L98
261 RWHP, 345 RWTQ
13.406 @ 103.72 MPH
ZZ4 bottom end, Edelbrock 6085 heads, LT4 HOT cam, GMPP 1.6 RR's, ported stock TPI, SLP 1 3/4" headers, no cat, Dynomax cat-back, Stock PROM
E.T.F.A Member #11

 

Thanks for all the replies! I was very hopeful until I read the last post! LOL! I don't have a cat on my car anymore! Guess I'll be looking into getting a heated O2 sensor!

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1986 Trans AM
305 TPI
Well over 200,000+ miles (speedo/odometer non-funtional! Odometer reads 142,000)
4 Wheel Discs
9 bolt Borg Warner Rear (2.77's....oh joy) :P
Completely Stock
Current Project: upgrade to a 355 TPI, 6" rods, 9.5:1 Compression, Stock TPI ported, 24#/hr LTI injectors, Hedman Shorty Headers, SBC Stock Casting heads pocket ported, Comp Cams XE262-14 TPI Cam, Ed Wright Fast Chip, Holley AFPR, TPIS airfoil, MSD wires, MSD 6-AL Box, proform hot coil!!

 

I am running the SLP 1 3/4 headers with no cat in an 89 IROC with the NON heated stock sensor and I have no problems at all!

 

I didn't have a Cat on my 86 either and still didn't have a problem, though my headers were heat wrapped so that might have helped as far as keeping the O2 sensor heated.


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89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

 

<------dynomax headers,three years,same o2,no problems

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1991 banditt2 #130 of 600
Project 350 TPI Banditt II
http://www.street-dawg-racing.cityslide.com
http://discussion-board.com/GreaterC...dyAssociation/
http://www.cincyspeed.com/

 

Well I think I'll just tryin' using a single wire first... it's cheaper anyhow! I called Bosch and can't find a 3 wire heated O2 sensor through them for my car! I'd have to buy the stock replacement 4 wire heated O2 sensor from a '94 + up Camaro or Firebird! Apparently, in 1994 GM started putting the 4 wire heated O2 sensor in ALL Camaros and Firebirds that came with the 5.7 engine! That one is $50 and then I'd have to try and figure out how the hell to hook the damned thing up! So I think I'll try the single wire first and go from there!

 

The three wire sensor that most people adapt to use on Thirdgens is the one from a '90 ZR-1 'Vette I believe.

 

SLP 1 5/8 headers with the original O2 sensor. 5 years and not one problem of SES.

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Rob Kowalski
85 IROC, 305 TPI, JET AFPR - 45 PSI, B&M Megashifter, B&M Shift Kit, 3.42 gears, SLP Airfoil, SLP 1 5/8 headers and cat back system, gutted cat, gutted airbox, MAF screens removed, K&N, more to come!!