CADILLAC CONVERTER removel?? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 11-14-2002, 06:46 PM
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Post CADILLAC CONVERTER removel??

I can't remember if i asked this question already but if you guys can help me answer it again i would appreshiate it.

WHAT I OWN

90 ranger 2wd short box and no extended cab

WHAT ENGINE

2.9L and with a manual transmittion



WHAT I PLAN TO DO

remove the cadillac converter

So yeah i know it is illegal but they never check so i am guessing no one will really miss it anyway. and if anyone wonders what state i live in it is minnesota.
My question is will it effect the engine in any way? I have heard both sides. "you need it because the enigne needs the back pressure" and then i heard "you don't really need it and removing it will probably make your engine run better" so now i am getting peoples opinions here. just for your information the oxygen sensor is in front of the converter also. Also i am planning to put a new muffler so the truck SOUNDS (because it doesn't really have a sound now) on so anyone have a good brand for under $50?

thanks for your time!!

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Old 11-14-2002, 07:22 PM
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I would remove it, hollow it out, put it back on. while it is true some back pressure is needed, but hollowing it out will likely give you better miliage as well as pick up some power. just make sure you disconnect the battery before doing this, and reconnect it after you finish, so your sensors can sense lower back pressure and richen up the mixture. as for a muffler, i`d say get a Jegs or a Summit and pick you one, they have many excellant designs.
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Old 11-14-2002, 07:28 PM
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I KNOW PEOPLE WHO REMOVE THERE CATALYTIC CONVERTER AND SAY THEY HAVE MORE POWER AND RUNS SMOOTHER BUT I DONT KNOW BECAUSEI HAVE NO EMISSIONS ON MY CAR EXCEPT A PCV VALVE,NO CHARCOIL CANISTER,CATALYTIC CONVERTER,EGR VALVE,OXYGEN SENSOR.JUST GAS AND FIRE AND RAW EMISSION OUT THE MUFFLER KILLING ALL THE WORLDS CREATURES BUT IT RUNS GREAT
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Old 11-14-2002, 07:42 PM
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The catalytic converter is a big glow plug that burns the unburned hydrocarbins. Living in MN., you've seen a hand warmer that burns lighter fluid. The Cat has a screen similar to that Lose it and your engine will run better. If your O2 senser doesn't adjust correctly, here is a site that may help.
. <a href="http://www.casperselectronics.com/" target="_blank">http://www.casperselectronics.com/</a> .
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Old 11-15-2002, 07:25 AM
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I would imagine that you also have a factory resonator located after the catalytic convertor. I would remove that along with the cat. and add an aftermarket muffler. You may also want to check into the "high flow" cats that CatCo sells through <a href="http://www.summitracing.com" target="_blank">Summit</a>.
What will probably happen is you will notice a slight loss in power on the low end due to the decrease in backpressure (although it will probably be minimal if you keep stock sized piping). Where you will gain the power is on the upper end.
If Ford's systems are similar to GM's, you will still have OBD-I diagnostics on your truck. Like you said, the O2 sensor is before the cat., so you probably won't have any issues with the wrong computer readings.
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