I have a 95 silverado with true duels. It has a 5.7 litre 350 small block. Is there any way i can eliminate the Oxygen sensor so it runs to its maximum performance.

thanks
alan

 

If you wanted to eliminate the main 02's, you'd have to eliminate the fuel injection all together and make it carbureted. If you're looking to eliminate the cats, they can be removed and replaced with straight pipe. I'm not sure if 95's have the rear O2's which monitor the cats...if they do, they can be eliminated with O2 sims or tuning. If you don't have rear (post cat) O2's, you can just eliminate the cats and leave the front O2's alone.

 

its only has one O2 sensor. also i have already done away with the cats. It had a y pipe with the O2 sensor in it. but i did away with that and got true duels. now the O2 sensor is in one of the pipes is that alright. If its not what can i do?

 

The O2's are the only way that the computer can make adjustments to your Air/Fuel ratio. If there's too much oxygen in the exhaust, the computer will inject more fuel to burn it up and vice versa. Your O2 is only taking the reading from one bank of the engine. Not really ideal.

 

It's fine for your truck to run with only one sensor on one bank. It's throttle body injected, so all the cylinder get the same air/fuel not like a sequential injected motor, where you could have a bad injector on one side causing a cylinder to run lean. You don't want to get rid of it, the computer needs it for running in closed loop cruising down the road. You would get horrible gas mileage as you would be in open loop all the time and it would always be throwing a code. When you get above about 80% throttle, it goes into open loop and doesnt use the o2 anyway, it runs strait off the fuel map in the pcm.

 

Actually, if you tune in Open Loop or Speed Density you will not use the o2 sensors.

Goto ls1tech's PCM section and search for "Open Loop".

 

ooops, didnt read your post. You are right.

Alot of the hardcore ls1 racers use this type of tuning.. enables them to run leaded race fuel, etc.

 

Yeah I was running a 50/50 100 octane/93 octane mix for about 6 months unitll about 3 or so weeks ago and now it looks like my B2 02 sensor is about shot(it works half the time) at least I hope thats all it is! Seems like it,!