X-PIPE LOCATION..

[1JEWLDSSRS]

Hello Camaro family, I have a question for you performance techs and the exhaust pros, I was at my dealership yesterday talking to my mech about my car and he showed me a 2010 SS L99 car that h3e installed a supercharger setup on, he had the car up on a lift to install a Hotchkis subframe connectors and swaybars and it had the GM performance exhaust on it and I noticed that the X-pipe was located behind the tranny tunnel brace and before the axles??? I asked why it was there and he said that is where it belongs.Before I installed mine I asked on here and was sent a pic of the proper location for it and it was before the tunnel brace where the big resonator was..What's up with that ??Does he have his in the wrong place? Or is this where it goes for supercharged aps..Thanks..Just curious..

[scythezo6]

My Xpipe is where the H-pipe used to be.

[1JEWLDSSRS]

Before the tunnel brace right??

[BLACK10]

It should be as close to the headers or exhaust manifolds as possible. Yet another Dealer tech that does'nt know sh*t........

Where do they find these guys?

[BLACK10]

Originally Posted by 1JEWLDSSRS

Before the tunnel brace right??

Yes, before the tunnel brace

[1JEWLDSSRS]

Originally Posted by BLACK10

It should be as close to the headers or exhaust manifolds as possible. Yet another Dealer tech that does'nt know sh*t........

Where do they find these guys?

That's what I was thinking and have read on here as to the location of it for best scavenging of the exhaust pulses. I didn't say anything to him about it, just shook my head in disbelief.. Just goes to show ya that some of these guys don't know what the F thay are talking about.And they are out there everywhere, just beware.. He's not working on my car..

[14pilot]

WRONG !!! WRONG !!! WRONG !!!

On a stock or bolt-on car (stock cam) the X-Pipe goes 73 inches behind the end of the stock cast iron manifolds, or...

...with headers, 73 inches behind the end of the primary tubes.

Also, both 36 1/2 inches AND 146 inches back will also work just fine too. Its about math, not myth...

There is no "Place" that is goes. Where it ends up depends on many factors, cam, headers, etc...

If that dealer car in question has long tube headers on it, the X-Pipe would be moved back from the stock location to be in the correct position. So many opinions, so many don't know $h!t.

[1JEWLDSSRS]

Originally Posted by 14pilot

WRONG !!! WRONG !!! WRONG !!!

On a stock or bolt-on car (stock cam) the X-Pipe goes 73 inches behind the end of the stock cast iron manifolds, or...

...with headers, 73 inches behind the end of the primary tubes.

Also, both 36 1/2 inches AND 146 inches back will also work just fine too. Its about math, not myth...

There is no "Place" that is goes. Where it ends up depends on many factors, cam, headers, etc...

If that dealer car in question has long tube headers on it, the X-Pipe would be moved back from the stock location to be in the correct position. So many opinions, so many don't know $h!t.

Does not have LT's on it. Stock exhaust manifolds..

[1JEWLDSSRS]

Originally Posted by 14pilot

WRONG !!! WRONG !!! WRONG !!!

On a stock or bolt-on car (stock cam) the X-Pipe goes 73 inches behind the end of the stock cast iron manifolds, or...

...with headers, 73 inches behind the end of the primary tubes.

Also, both 36 1/2 inches AND 146 inches back will also work just fine too. Its about math, not myth...

There is no "Place" that is goes. Where it ends up depends on many factors, cam, headers, etc...

If that dealer car in question has long tube headers on it, the X-Pipe would be moved back from the stock location to be in the correct position. So many opinions, so many don't know $h!t.

Care to explain ?? Cause now everyone elses advice is wrong..

[14pilot]

Originally Posted by 1JEWLDSSRS

Does not have LT's on it. Stock exhaust manifolds..

Ok, so if this car has a stock cam too, then the X-Pipe location is found by measuring directly down the imagined centerline of the exhaust pipe.

It would work fine at 36 1/2 inches back, EXCEPT the transmission would be in the way. So keep measuring back down to either 73 or 146 inches from the manifold/exhaust pipe joint.

If they put a cam in it (doubtful) then its a different measurement based on that cam.

Measurement from end of manifold (or primaries on LT headers) to the center of the X-Pipe

[14pilot]

Originally Posted by 1JEWLDSSRS

Care to explain ?? Cause now everyone elses advice is wrong..

Yes, they are wrong.

The location is calculated using all the engine specs, focused on the cam timing. The calculation results in locations that determined in inches from the ends of the manifolds. The length is a tuned length based on the engine's exhaust harmonics.

As for the factory H-Pipe location, it is correct for a stock engine.

[1JEWLDSSRS]

Originally Posted by 14pilot

Yes, they are wrong.

The location is calculated using all the engine specs, focused on the cam timing. The calculation results in locations that determined in inches from the ends of the manifolds. The length is a tuned length based on the engine's exhaust harmonics.

As for the factory H-Pipe location, it is correct for a stock engine.

OK, thanks for the explaination, so with this being explained I need to move mine back to where his is depending on the measurement ? And if I move it will there be any noticable difference in the sound or the performance of the car? I think I see what you are saying.Thanks.

[14pilot]

Originally Posted by 1JEWLDSSRS

OK, thanks for the explaination, so with this being explained I need to move mine back to where his is depending on the measurement ? And if I move it will there be any noticable difference in the sound or the performance of the car? I think I see what you are saying.Thanks.

If you are staying stock with the cam and you keep the stock cast iron exhaust manifolds, put the X-Pipe at 73 inches back. This will be about right where the stock H-pipe is at. If you put on long tube headers, then measure 73 inches back from the end of the primary tubes. This is also the same point as the front of the collectors (where the primaries join the forward part of the collectors). If you are going to cam the car, PM me the cam specs so I can calc where the X-pipe goes. For instance, if you were to cam the car with a cam that peaked at 6,400RPM, then the X-pipe would go 68 inches back instead of 73 inches back. If you then stroke the engine to 416c.i. then the X-pipe moves again.

Point is there is not a place on the car for the X-pipe, there is a measurement back based on what you are running under the hood.

You can use thin inexpensive striping tape to measure down the centerline of the exhaust pipes. Best to clean the pipe first. If you are careful, you can also use a steel measuring tape and sharpie to measure your way down the pipe. Just remember to imagine the pipe's centerline, start at the end of the manifold, end at the center of the X-pipe.

The correct location won't change sound much if any, but it will give the best performance. Good luck.

[alybudhwani]

thanks for the info 14pilot, this helped me a lot!!!