01 Trans-Am WS6

iTrader: (5)

I have an 01 T/A WS6 and the only mods are SLP Lid and SLP Loudmouth exhaust. I am thinking about taking the exhaust off right where it starts (where the Loudmouth bolts up to the rest of the factory system) and run it like that just for a few days or so. I just want to make sure that it won't mess anything up, which im pretty sure it won't as a cut-out is pretty much the same. Only reason I ask is because I ran my 3000GT open headers for a few days and people kept telling me it needed backpressure and the valves will float.

homerunhtr21

iTrader: (18)

I had to drive probably 15 miles with nothing but headers and my car wouldnt even make it half way...it kept dying and bucking like crazy...this might have just been my car but without some sort of exhaust my car would not run :/ ...Once I got the exhaust on it ran fine..who knows

LTLRDSS

iTrader: (2)

i drove my car open header for a week or two with no problems just don't go wot

01 Trans-Am WS6

iTrader: (5)

Hmm I wonder if your car kept dying and bucking because the O2 was throwing a code?


Also why not go WOT? I just want the car LOUDDDDDDDDDDD for a few days, and I have time to kill now so why not?

homerunhtr21

iTrader: (18)

I looked on here and asked also because I didnt wanna mess anything up lol...but I fired it up and after about 100 ft the car went lol

98RedBird

iTrader: (77)

It's just not good for your 02's without some sort of extension of pipe on each collector that is about 12 to 14 inches in length. As long as you're soft on the idle it really shouldn't hurt too much but what happens is on the negative exhaust pulses it will suck fresh o2 back in the end of the collector and your 02 sees that as being a very lean condition so it dumps more fuel in. People do it and it doesn't hurt anything but really you should keep it to a minimum if at all possible. And do not go wide open with it, that's a good way to wash cylinder walls down, or burn out your 02's.

Whoever told you that you need backpressure is full of crap, on these cars at least.... The 3000 may be different but we need no backpressure at all. What you don't want as I said before is unmetered oxygen being picked up by your 02's. It's giving the PCM false readings which is why the car has problems holding idle, bucking and such.

9000th01ss

iTrader: (10)

I don't get some peoples opinions.
WOT is going to wash the cylinders down? With what?

The only problem you're going to run into is with the O2 sensors.

I've run cars to the track down the highway at 5000 rpm, open headers for 45 minutes. Only thing it hurts is your ears.

98RedBird

iTrader: (77)

Correct. Chances are very minimal. He asked to get different opinions. My statement regarding washing the cylinder walls down was directly from Texas Speed. I asked them the question years ago when I did my exhaust and got the same response that I gave. I am going to take their word over yours.... Sorry. Whether you believe it or not is fully up to you. I won't be offended either way.

As you stated though, the biggest problems are going to be damaging your 02s, which will just put you into an open loop, which won't hurt the car but you'll be buying new 02's which is just money that shouldn't have been spent in the first place or you'll be gaining a lot of unwanted attention from the law, which here again could result in money that shouldn't have been spent.

Back to the original poster. No, it will not hurt anything, just be easy on the throttle like I said in my first post and you'll be fine.

01 Trans-Am WS6

iTrader: (5)

Thanks for all the quick responses guys! I think im gonna go take a look at the exhaust, and if its a 1-2-3 job I will do it for the night or tomm maybe and put it back

SuperSlow02

iTrader: (16)

I ran my a few days on Open headers, These cars are freakin quite when at idle. As to the WOT, I did a few runs on mine and it still runs fine a year and a half later, but **** happens too

ICEMAN 31

if you like them just get the 02 sensors tuned out and call it a day

BlkBird2000

iTrader: (10)

I won't be surprised to see you post back up tomorrow saying you got a ticket...

I ran open headers from my house to the muffler shop which was a 2 minute drive. Cops don't like loud cars around here.

95 Z28

iTrader: (21)

I'd put an extension on each header with maybe a turndown on the end. Hot o2s + fresh, cool air = you most likely buying new o2s.

99FormulaM6

iTrader: (21)

Like stated above...don't worry about backpressure. Worry about the O2s if you want to worry about something.

I ran open headers in my Formula a few times. Usually after finishing other jobs like dropping the tranny, head swap, etc and I was too lazy to put the exhaust back on. I had an exhaust shop cut me two 16'' pieces of three inch pipe to clamp on to save the O2s though.

On my SS, there are dual cutouts right after the collector, but it has the O2s tuned out, so it doesn't matter. But the reason they were tuned out is because the O2s kept getting burned up with the cutouts constantly open.

Tudds

iTrader: (4)

I ran open headers for a while.... I was fine... floored it and everything... fireballs shot out after I got off the gas

01 Trans-Am WS6

iTrader: (5)

Well I didn't take the exhaust off, I tried, but with hardly any room to work and a bad jack it wasen't worth the effort. I'll just do it when I have somemore room under the car.


Also I ran my 3000GT open headers for WEEKS, and never got in trouble for it. The cops don't mind loud cars around here

bww3588

iTrader: (49)

its not going to hurt anything just taking the catback off, but taking the y off totally will burn up your O2's

and just for clarification, whoever asked about washing cylinder walls down, when the PCM sees excessive O2 in the exhaust, it will dump more fuel in the cylinders that dont have enough air to atmoize the fuel, causing liquid fuel in the cylinder washing all the oil off the cylinder walls and eleminating the ring seal.

ballhawkdawk

It all depends on your area or what cop you come across. I've had cops directly behind me at stoplights when I had open headers, and they did nothing.

BLK85

iTrader: (1)

My O2s were throwing a code for a week or two and it ran fine.

01 Trans-Am WS6

iTrader: (5)

I guess PA cops don't really mind loud cars then. Im from PA aswell and ALL my cars have been LOUD. None except my T/A have had cats on them...once I get my LT's the Bird will be joining that group though