cutting catalytic coverter ?

[sking3111]

I have a 95 Cheyenne 2500 thinking about cutting converter to help power and sound. I ve heard so many different opinions a lot of saying check engine light coming on, loss of power and engine backfiring. just curious what u guys think> Thankyou

 

[Iowan]

I've been thinking and wonder about this very subject. I don't really have an opinion on it yet.

 

[cnowalk]

My truck is catless with true dual exhaust and flowmasters, but the previous owner did everything so I’m not 100% on what mufflers I have. No driveability issues, but the check engine light is on. It’s a bit loud for my taste but it doesn’t sound bad, although I’ll probably get it toned down eventually.

 

[Jay33089]

I had a 95 k1500. I gutted the converter. Helped tremendously with fuel consumption and power. Check engine light never came on. It shouldn't on a 95 as they are TBI and only have one O2 sensor on the driver exhaust manifold.

 

[Iowan]

I had a 95 k1500. I gutted the converter. Helped tremendously with fuel consumption and power. Check engine light never came on. It shouldn't on a 95 as they are TBI and only have one O2 sensor on the driver exhaust manifold.

How much of an improvement did you notice fuel wise?

 

[jkeaton]

I had a 95 k1500. I gutted the converter. Helped tremendously with fuel consumption and power. Check engine light never came on. It shouldn't on a 95 as they are TBI and only have one O2 sensor on the driver exhaust manifold.

This. No downstream sensor on a 95 so no check engine light. I’ve found the gains to be minimal by gutting the cat.

 

[Jay33089]

How much of an improvement did you notice fuel wise?

I'd say I gained at least 3 mpg, but mine was crumbling and was blocking the air flow. As @jkeaton said most of the time there's not a real big gain in mpg's and power. As old as the cat is there is a possibility that it's beginning to crumble. If you can get to it shine a light inside and see what it looks like. If it looks clean and you can clearly see the honeycomb, then it's probably ok. If not and it looks like it's falling apart, gut it.

 

[Iowan]

I'd say I gained at least 3 mpg, but mine was crumbling and was blocking the air flow. As @jkeaton said most of the time there's not a real big gain in mpg's and power. As old as the cat is there is a possibility that it's beginning to crumble. If you can get to it shine a light inside and see what it looks like. If it looks clean and you can clearly see the honeycomb, then it's probably ok. If not and it looks like it's falling apart, gut it.

Thanks. I will probably take it off either way. Thank God for no emissions!

 

[DerekTheGreat]

My vote is keep it. Nothing like stinky hydrocarbons flowing back into the cab or getting sucked in through the HVAC system when the wind is blowing the wrong direction. That stink permeates your clothes & sticks with you... Walker makes good highflow replacements. Where are the dyno results which support these claimed gains

 

[magimerlin]

Plan and simple fact, proven many a many time in many differant places...... the age old, cat no cat discussion...

If your cat is not clogged and or melted(caused by an engine issue to begin with as they do not melt or clog for no reason on their own) it will NOT hurt your mileage and or backflow and or performance.

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