I have an 87 TPI motor and have recently gutted the cat, I have been advised to use a heated O2 sensor. Is this really necessary? How can I check? Where and what part do I need? And how do I hook it up with the two extra wires? I just want to make sure my car tuning doesn't become effected. Thanks.

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87 GTA 350 L98
K&N filters, beefed up TH-700r4, Accel Manifold, Ported Plenum and Runners, Fuel Press. Regulator 49.5psi, air foil, modified MAF, SLP cold air box, Hypertech Thermomaster chip w/160 thermostat, MSD 6AL and Blaster 3, B&M shift kit & megashifter, Moser Ford 9in Rear with Richmond 3.50 and locker, Edlebrock TES headers and Cat Back,Hotchkis setup in rear, Poly suspension and Koni in the front, relocated MAT, bypassed TB coolant, 300 lbs lighter

Fastest ET's
Stock-0-60 6.8, 1/4 15.0 @ 94
Best-0-60 4.7, 1/4 12.8 @ 112
Norm-0-60 5.2, 1/4 13.2 @ 108

 

Bosch p/n 13077 for 92 LT1 Vettes. The black wire is the signal wire and the two white wires are for power and ground. It doesn't matter which one you make hot or ground. I used a GM weatherpack connector when I made the harness for it. I ran the hot wire to the fuse block under the dash and connected it to a source that's only on when the car is running.

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Mongoose-NCTGA-1990 Pontiac Formula/305 TBI-700R4 with Edelbrock Performer TBI intake,TES headers,and STB,K&N,MSD-6AL,Holley laser shot coil,Accel Extreme 9000 wires,Jet Stage 2 chip,TCI shift kit with corvette servo,Richmond 3.73 gear with Auburn 3 series posi,high flow cat,SLP 3" cat back,Eibach sportline springs,Energy Suspension poly throughout,Lakewood LCA and adjustable panhard bar package,SSM subframe connectors,IROC wonder bar,Tokico 5 way adjustable struts and shocks,Autometer electric fuel pressure gauge,Alpine,JL Audio,MB Quart,92 GTA taillights,92 GTA aero wing and hatch,Steve Spohn LCA relocater kit and torque arm,MacEwen White face gauges,84 T/A cold air induction air cleaner,Grant Formula GT wheel.

 

Whats the gain of the Heated O2 sensor. I have no cats and still the stock style O2 sensor and it works fine

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1992 Z28 W/5.7L. Teal with unpainted cowl hood,18" Billet Specialities Rims,Eibach Sportline Springs, Leather int., B&M Mega Shifter, Headman Headers, Flows,No Cats,K&N,HyperTech air foil,Custome Burned Chip,MSD Ignition,Shift Kit, Billet Corvett Servo my Back License plate reads "ALL UL C"

Here's a couple pics of my car

http://www.geocities.com/jonnyarson/maro.jpg

http://www.iroczdesigns.com/images/camgf.jpg

http://www.iroczdesigns.com/images/cam5.jpg

[This message has been edited by BigMike 92 Z28 (edited April 18, 2001).]

 

From what I understand, the heated o2 is needed to make sure the car goes into closed loop. Having the cat on which causes the backpressure, also causes more heat, which actuates the o2. I could be wrong, correct me if I am, but I think the o2 needs 660 degrees in order to go into closed loop, think I read that somewhere. If it doesn't read it, it will keep it open. I am wondering if it really necessary too, and that's what I'm asking. Thanks.