Remove catback safe?

You wouldnt really damage anything as long as you dont drive far. And you will lose all back pressure and power. But it will be loud as #### haha

 

You wanna drive around Adelaide without an exhaust...... Right.....
Here is what i read in your quote above
But no you wont damage anything except your reputation

lol

 

Loosing back pressure is a good thing.

FWIW the dangers are something coming into contact with the hot exhaust gases trapped under the car then overheating and catching fire and carbon monoxide poisoning if finds it's way into the cabin.

 

Why would you want to remove your exhaust system!!!

 

Can you elaborate?

 

If you loose too much back pressure the engine will run like crap. The the exhaust system has to flow at a certain rate to get the best ecomomy and power from the engine, and no back pressure gives you bugger all flow. Take extractors for example, the exhaust exits the cylinders in "pulses", and the inertia of one pulse exiting the exhaust, helps pull the next pulse along the exhaust system with it.Hence the name "extractors".

 

Starting it won't do much damage. Out of basic respect for your neighbours and people around you, running or driving it for long is not recommended. Most people wouldn't have to ask to know this though.

Generally loosing back pressure is a good thing, but having a exhaust that is too large also bad for power. The guy who posted about BP was sort of on the right track in that any scavenging effect from one bank to the other will be zero. For the exhaust to work at it's optimum, the gas needs to be flowing as fast as you can at peak temperature for as long as possible. What that means is that most of those cars with fully sik 3" systems have the exhaust gas slow and cool too quick, robbing them of power (no scavenging effect) and sounding like **** because of drone.

Reaper

 

Yes.
Would you like to start a new thread and list the reasons why back pressure is a good thing for power and economy?
Maybe HSV, pacemaker and all the other exhaust experts had it wrong.

 

SOunds about right. I was asking on why VR38 thinks that losing backpressure is a good thing

 

The op stated dropping the exhaust cat back, there was no mention of removing extractors at the heads, I guess you can change anything around to suit your argument on the internet.

 

Im not starting arguements or whatever, Im just stating fact, and I used the extractors thing as an example of how the exhaust flowing properly can actually help an engine achieve more power and better economy, because losing all backpressure is bad for flow.

 

Loud enough for your neighbours to be like

 

No harm done.

To the OP, it will be very loud, just like the cars at the speedway, you gonna make yo mumma proud.

 

Losing is the word your after. And no, losing backpressure is not a good thing.

No, HSV, pacemaker, etc all have it right. Just you seem to have it wrong.

Having the right amount of backpressure for your application is the correct statement.

Pulling the whole exhaust system off a VS S with an ecotec will result in not enough backpressure, a car that runs rough and loss of torque low in the range.

In response to the OP, no, starting a car without an exhaust system on it will not damage your car. It will damage your lungs and your ears.

Driving with a car with no exhaust system will do the above, and annoy your neighbours, and potentially melt something or catch something on fire, and potentially cause you to crash into something when you pass out from carbon monoxide poisoning, and damage the reputation of holden drivers everywhere further.

If you want to hear how it sounds, there are some video's on youtube showing this.

Cheers,

 

Most of the exhaust system is behind the cat, hence the name "catback" or from the catalytic converter back.

 

Its sounds crap. And its FAH HUCKING loud. ( yes I speak from experience, But I did it on a rural property and I didn't drive it. )

Eg.

BRRRRAAAAAAAAAAAAAARRRRRRRPP!!!!! DUUUUUUUUUUUUUHHHHH, CRACK CRACK POP BANG.

 

From the cat will have a difference, there will be less poisonous gases entering the cabin. Operative word being "less".

In regards to extractors, depends what your aim is.

Extractors usually improve performance and fuel economy. So if that is what you are after then yes, they are worth it. Though "worth it" is subjective but that's another thread.

If you are after a change in sound, they will affect sound to a point. When I did headers on my old VX 6 they made the car a touch louder and a touch lumpier at idle IMO.