Can a Cherry Bomb Glasspack be mounted where the catalytic converter is supposed to go and then put a muffler eliminator where the glasspack used to be? I planned on doing this to my car, as I've already got all the parts and I don't have to spend money on it, but my dad says that the muffler might get "Burnt up" if it's placed so close to the heat like that. would it really make a difference there as opposed to the normal spot? I know cherry bomb makes Header mufflers and all, but are they different than a regular glasspack, other than the mounting bracket?

From what I understand, if it's got fiberglass the stuffing can melt over a period of years. Faster if it is closer to the exhaust ports. However, I think that Borla sells absorbsion mufflers that have steel wool stuffing that won't go bad.

Smarter to stick in a piece of pipe where the cat was and replace the muffler with a glasspack.

1. header mufflers are different than glasspacks.
2. catalytic converters convert gasses, not suppress noise.
3. mufflers wont fit into the same space as converters.
4. there isnt much point to putting the muffler closer to the source of ignition.
5. If your looking for a quick fix and dont care about the effects of your service light being on all the time, AND its not illegal....put what they call a test pipe in place of the converter, and put the glass pack where it is supposed to go.

1. header mufflers are different than glasspacks.

True.

2. catalytic converters convert gasses, not suppress noise.

Actually, they do both. My old exhaust system was a tri-cat setup with a muffler. I had the muffler removed one day and it didn't make a bit of noise difference, the cats effectively muffled it.

3. mufflers wont fit into the same space as converters.

I'm pretty sure they can, you just need to find one with the right in/out offset (or no offset)

4. there isnt much point to putting the muffler closer to the source of ignition.

Again, true.

5. If your looking for a quick fix and dont care about the effects of your service light being on all the time, AND its not illegal....put what they call a test pipe in place of the converter, and put the glass pack where it is supposed to go.

Depends on whether the car has 1 or 2 oxygen sensors. If there's a sensor before and after the cat, the car will run like shit after the computer adjusts the mixture due to the changed oxygen sensor readings. I believe there are devices you can plug into the oxygen sensor connector that will send good readings to the computer, so it runs normally.

Not to flog a dead horse further Rocko, but I was supporting what you said the first time. I do agree that the cat will suppress some "little" noise, but thats not is purpose. You can see straight through it and there specifically isnt anything to slow down the passing of gas so it can do what it was designed to do and that is to convert burnt and unburnt gasses to less harmful emissions.

It is a good point that you bring up about the o2 sensors. If someone were to put a test pipe in, they need to put a bung in to accommodate the sensor....otherwise the service light will stay on. It will stay on because there is a problem with the amount of fuel being burnt, or not burnt, which in turn can destroy other things that make your motor run.

1. header mufflers are different than glasspacks.
I know this. Cherry bomb, the company I bought my glasspack from, has Glasspack header mufflers. I was wondering if there was any difference in the construction of a regular glass pack and a header glass pack other than the mounting bracket.

3. mufflers wont fit into the same space as converters.
Yes it will. I've measured the pipe on both sides of the cat and purchased 2 sizers for each side of the muffler.

The reason I want to put the muffler where the cat is, is because where the muffler is supposed to sit is weird. The original tail pipe wont fit correctly unless the glasspack sits at a weird angle. The glasspack would just fit right in to where the cat sits, and then the eliminator pipe I have is flexible and would bend to fit right into the place the muffler goes.

5. If your looking for a quick fix and dont care about the effects of your service light being on all the time, AND its not illegal....put what they call a test pipe in place of the converter, and put the glass pack where it is supposed to go.
I drive a 1980 pontiac firebird. The only service lights it has are the temp, oil and volts.

sorry for the delay...lost my connecton. yeah, your good to go. They are essentially the same on the inside.

Not to flog a dead horse further Rocko, but I was supporting what you said the first time. I do agree that the cat will suppress some "little" noise, but thats not is purpose. You can see straight through it and there specifically isnt anything to slow down the passing of gas so it can do what it was designed to do and that is to convert burnt and unburnt gasses to less harmful emissions.

It is a good point that you bring up about the o2 sensors. If someone were to put a test pipe in, they need to put a bung in to accommodate the sensor....otherwise the service light will stay on. It will stay on because there is a problem with the amount of fuel being burnt, or not burnt, which in turn can destroy other things that make your motor run.

No, the catalytic converter cannot be seen through. Only a high flow catalytic converter from a performance company can be seen through. Most catalytics are not even close to being able to be seen through and contain a LOT of catalyst material. I know. I've gutted several of them. They are very restrictive and cause a horsepower loss.

The car uses the front most O2 sensor to determine air/fuel mix. The O2 sensor that is in the catalytic converter does not actually have an affect on the engines running air/fuel ratio. It is used to determine if the catalytic is working right. You will get a light that says that your catalytic is failing, or that your REAR O2 sensor is not working correctly.

ECU's operate in open loop or closed loop mode. Open loop mode uses fueling values from a table or equations based upon your airflow sensor. It uses this mode when you are at wide open throttle.

Open loop mode is when the ECU is using information mostly from the oxygen sensor to determine air/fuel ratio. It uses the front O2 sensor.

The O2 sensors in your car are narrow band O2 sensors. They can only accurately determine air/fuel ratios from about 14.5-16:1. Your car under wide open throttle needs an air:fuel of around 12-13. 11.5 or so if your car is turbocharged. Obviously the O2 sensor would NOT help in this situation.

In conclusion. the O2 sensor that is in your catalytic converter is a piece of shit that does not adjust your air/fuel ratio, and only causes stupid warning lights to turn on. If you only have one o2 sensor, your car either doesn't have it within the catalytic converter, or your car doesn't use closed loop mode to determine air/fuel ratios.

So NO. Removing a catalytic converter will not destroy your engine. With a test pipe, you do not need a bung for the catalytic converter's O2 sensor. You can put one in, but it'll still throw a CEL. Just zip tie that shit up outta the way, or unplug it.

YES it will make your car considerably louder and increase horsepower.

The amount of misinformation being thrown around in here is retarded.

The amount of misinformation being thrown around in here is retarded.

Isn't that how we all learned, though?

to seph:

with vw/audi 1.8t the rear o2 sensor can stop a MIL with a bung to space out the rear o2 sensor, its a common mod when a test pipe is done.

with the newer 2.0t fsi, programming can stop the code from appearing.

the rear o2 sensor is just for emissions.

and another benefit to the test pipe is that turbos spool up much faster.

so i agree with ya, i would have a test pipe for my car, but fuckin cali does the smog check, and i know with a test pipe i wont pass emissions :(

Yay firefox

to seph:

with vw/audi 1.8t the rear o2 sensor can stop a MIL with a bung to space out the rear o2 sensor, its a common mod when a test pipe is done.

with the newer 2.0t fsi, programming can stop the code from appearing.

the rear o2 sensor is just for emissions.

and another benefit to the test pipe is that turbos spool up much faster.

so i agree with ya, i would have a test pipe for my car, but fuckin cali does the smog check, and i know with a test pipe i wont pass emissions :(

There are also wiring mods you can do that involve wiring a resistor into the wiring of the rear O2 sensor. The spacer + O2 sensor mod only keeps the CEL off for a while, at least it did on my WRX. It came back.

And most cars that have an ECU mod have a way to turn off that specific CEL.

Yeah, it does spool up turbos faster too. Anything that increases exhaust volume post turbo will help spool them up faster, since turbo spool acts on a pressure ratio. The higher the ratio pre turbo to post turbo the faster it spools.

There are also wiring mods you can do that involve wiring a resistor into the wiring of the rear O2 sensor. The spacer + O2 sensor mod only keeps the CEL off for a while, at least it did on my WRX. It came back.

And most cars that have an ECU mod have a way to turn off that specific CEL.

yep, i think they do the resistor mod on the s4 2.7t audi. due to the complete lack of space around the motor / turbos / cats (to change the turbos out, you have to pull the whole motor, in my 1.8t when i replaced the turbo, i only had to jack the car up to get fluids out, and to take the turbo out, all i had to do was take the airbox out of the way, and bam. easy access. love a longitudinal 4-cyl.)

i know for audis they havent been able to get rid of the o2 MIL with programming in the 1.8t (havent broken the encryption for the emissions stuff or some shit like that) but with the new 2.0t fsi they did. weird IMO.

but fuck emission laws. global warming wont affect us significantly in our life time, why cant states have emissions laws like michigan where you dont have to get your shit smogged.

but fuck emission laws. global warming wont affect us significantly in our life time, why cant states have emissions laws like michigan where you dont have to get your shit smogged.

We shouldn't pollute as much as we do, but the greater burden should be on industry.

We shouldn't pollute as much as we do, but the greater burden should be on industry.

Humans are a virus in shoes. We are the worst thing ever to happen to this planet. Two internets if you know who said that.

I don't know who said it, but I agree with it.

I don't know who said it, but I agree with it.

Same guy that made this
http://www.youtube.com/watch?v=gDW_Hj2K0wo