LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Cutout at headers? or after Y?

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Old Feb 22, 2004 | 11:53 AM
  #1  
Xride's Avatar
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Cutout at headers? or after Y?

Been thinking about my echaust lots, and searching lots. but still cant find any information about this.

For LT's would a cutout off each header be better then one after the 3" Y

or would a 10" peice of 3" pipe befor the cutout be better?

or would trying to get a crossover then cutouts then go back into a Y
I have NO idea if that will fit at all, jsut an idea right now.
Old Feb 22, 2004 | 11:56 AM
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I would worry about extra oxygen reaching the O2 sensors if the cutouts are too close to the O2 sensors. This would make the engine run very rich and foul plugs, O2 sensors...

Dan
Old Feb 22, 2004 | 11:57 AM
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Xride's Avatar
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Originally posted by stereomandan
I would worry about extra oxygen reaching the O2 sensors if the cutouts are too close to the O2 sensors. This would make the engine run very rich and foul plugs, O2 sensors...

Dan
how far away do they have to be?
Old Feb 22, 2004 | 12:01 PM
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I don't know. All I know is that guys who drive with their LT's with open collectors to the muffler shop to get the Y pipe welded on end up running very rich. They have fouled O2's and had very bad gas milage. This would be very similar to putting the cutouts right after the collectors.

Dan
Old Feb 22, 2004 | 12:56 PM
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Xride's Avatar
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Originally posted by stereomandan
I don't know. All I know is that guys who drive with their LT's with open collectors to the muffler shop to get the Y pipe welded on end up running very rich. They have fouled O2's and had very bad gas milage. This would be very similar to putting the cutouts right after the collectors.

Dan
did some searches and found that too.


Anyone know the distance it should be to run properly?
Old Feb 22, 2004 | 01:01 PM
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I have my cutout at the bend close to the axle.
Old Feb 22, 2004 | 02:07 PM
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Originally posted by TenaciousZ
I have my cutout at the bend close to the axle.
Same here.
Old Feb 22, 2004 | 02:41 PM
  #8  
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Originally posted by Dragon Racing
Same here.
Ok, so after the Y doesnt have any adverse effects in power?

Thanks.
Old Feb 22, 2004 | 03:07 PM
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i have mine after each of my headers on my y-pipe. LOVE IT!!!!!
Old Feb 22, 2004 | 03:14 PM
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Originally posted by 96LT14u2Nv
i have mine after each of my headers on my y-pipe. LOVE IT!!!!!
you running rich at all?



damn now I'm all confused again.
Old Feb 22, 2004 | 03:26 PM
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just take off the muffler. it is bolted on.
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