Initial Start Up Exhaust
Thread Starter
Staging Lane
Joined: Apr 2009
Posts: 94
Likes: 5
From: Western New York
Initial Start Up Exhaust I have a question about what exhaust you used for your initial start up after the engine swap. Did anybody tow the car to get the exhaust installed first, or did you just put some straight pipes on the headers or exhaust manifolds? I ask this in regards to the O2 sensors, where did you put them if you did not have a full exhaust.
I am putting an LS1 from an '04 GTO into a 65 GTO and I am plannig to use F-body exhaust manifolds. Thanks in advance,
Mike
I am putting an LS1 from an '04 GTO into a 65 GTO and I am plannig to use F-body exhaust manifolds. Thanks in advance,
Mike
I've always run mine with open headers and O2's in them. Then I do the really trailer trash thing and drive to the exhaust guy. My neighbors love me, hahaha! 
As shown...
http://www.youtube.com/watch?v=TNSw9Q0P3Dk
As shown...
http://www.youtube.com/watch?v=TNSw9Q0P3Dk
If you can drive the car a short time before the engine warms up and goes into closed loop mode you would be ok as in open loop it ignores the 02's anyways. If the engine goes into closed loop, the PCm will see 450mvolts and read that as lean and dump tons of fuel all over the bottom side of your chassis. Just rent or borrow a trailer or tow dolly. Not worth getting the whole bottom of the car all dirty with raw fuel.
If you can drive the car a short time before the engine warms up and goes into closed loop mode you would be ok as in open loop it ignores the 02's anyways. If the engine goes into closed loop, the PCm will see 450mvolts and read that as lean and dump tons of fuel all over the bottom side of your chassis. Just rent or borrow a trailer or tow dolly. Not worth getting the whole bottom of the car all dirty with raw fuel.
J/K My exhaust guy is really close so it's not a big deal but it also depends on where the O2's are located. If they're at the end of the headers, no dice but on my Thunderbird they were really close to the engine and I have a long ways before the end of the collectors. Trending Topics
Raw Fuel??? If you can drive the car a short time before the engine warms up and goes into closed loop mode you would be ok as in open loop it ignores the 02's anyways. If the engine goes into closed loop, the PCm will see 450mvolts and read that as lean and dump tons of fuel all over the bottom side of your chassis. Just rent or borrow a trailer or tow dolly. Not worth getting the whole bottom of the car all dirty with raw fuel.
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Teching In
Joined: May 2010
Posts: 38
Likes: 0
From: BREW CITY, WI
Only thing I can think of is that he's assuming its tons of unburnt fuel getting sprayed out of the open headers onto the chassis. If thats not it, then I don't have a clue how that would happend.
Usually if you have a failed o2, it will just pop the CEL and run like crap.
Usually if you have a failed o2, it will just pop the CEL and run like crap.
TECH Resident
Joined: Nov 2007
Posts: 816
Likes: 0
From: Texas
I am running stock manifolds. I had to plug the driver side o2 port in the manifold it hit my frame. I purchased the mating flanges off the cats from a salvage yard took them to the same place I had planned to do my exhaust. I had them weld some short straight pipes to the flanges with O2 bungs I took them. I then finished the swap drove it to the same shop weeks latter and they finished the rest of the pipes starting from the short sections I had already installed. I live in the sticks so the noise was not much of an issue. I also white trashed it 14 miles to the muffler shop.
What can I say I really white trashed it on my first test drive
COUNTRY BOYS CAN SURVIVE.......................
http://s282.photobucket.com/albums/k...t=MOV06596.flv
What can I say I really white trashed it on my first test drive
COUNTRY BOYS CAN SURVIVE.......................
http://s282.photobucket.com/albums/k...t=MOV06596.flv
Last edited by rockytopper; Jan 27, 2011 at 01:59 PM.
