Exhaust 2xX's
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Staging Lane
Joined: Oct 2005
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Exhaust 2xX's Im slowly making my way up the learning curve for the LS1, im used to ford's 4v 4.6. I know for us (atlest mark8's) The optimum ballance for the exhaust is to use duel X pipes. It also makes for one amazing exhaust note.
I was wondering if anyone uses 2xX's for the LS1, and if so..do ya have any sound or vid clips. Have you noticed any more improvement over other systems you have had, or been witness to?
I was wondering if anyone uses 2xX's for the LS1, and if so..do ya have any sound or vid clips. Have you noticed any more improvement over other systems you have had, or been witness to?
10 Second Club
Joined: Aug 2004
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From: Houston
Originally Posted by Full-Force
Personaly I have never heard pf using 2 x's but I can assure you that you wont find anything of the sort around here.
I've never heard of that before... I always thought you wanted the least bends as possible?
+1 for this topic I'm curious...
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Staging Lane
Joined: Oct 2005
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Well, from my experience with the mod motor, the exhaust system needs to be ballanced some way or another. The h pipe doesnt offer proper ballance all the time, and creates turbulance in the exhaust, the Y pipe compresses the gasses into one pipe which is ok, in my oppinion, but only if u are running a single large pipe afterwards. But the X pipe offers perfect ballance, and gives a good deal of backpressure, but when going with 2.5"pipes (on the 4.6 4v ford) you need more backpressure, so you add another Xpipe, which doesnt nessissarly restrict airflow because of the bends, they are light sloping bends for free flow. Not to mention, the flow of the gasses creates an amazing exhaust tone
heres a sound clip of the tone...
http://www.lincolnmotorsport.com/xpansionx2.wav
http://www.lincolnmotorsport.com/jimspipes.mpg
but its mostly for the performance.
heres a sound clip of the tone...
http://www.lincolnmotorsport.com/xpansionx2.wav
http://www.lincolnmotorsport.com/jimspipes.mpg
but its mostly for the performance.
Last edited by Mrwilson; Oct 30, 2005 at 04:11 PM.
Some people have used dr.gas x-pipes on their LS1 dual setups. This is the best design i have ever seen in terms of an x-pipe. I prefer the h-pipe setup i currently have 
. I must say that i admire the sound made by the 4.6L 4V Ford motor.
. I must say that i admire the sound made by the 4.6L 4V Ford motor. Thread Starter
Staging Lane
Joined: Oct 2005
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Originally Posted by RedRider81
Some people have used dr.gas x-pipes on their LS1 dual setups. This is the best design i have ever seen in terms of an x-pipe. I prefer the h-pipe setup i currently have . I must say that i admire the sound made by the 4.6L 4V Ford motor.
. I must say that i admire the sound made by the 4.6L 4V Ford motor.yeah, its extreemly agressive.
http://www.lincolnvscadillac.com/sho...ust+commercial
http://www.lincolnmotorsport.com/xx2.wmv
I definatly would testify as to how good a duel X setup is. Most people dont like the single X because of the noise and the vibration caused by the noise, but with the duel x it makes the car a nice sleeper at idle, and make it sound like the gates of hell opened behind you at WOT.
TECH Fanatic
Joined: Sep 2004
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From: Las Vegas
First off... let us define what a "true X-pipe" really is.
The individual who designed, and then sold the rights to Dr.Gas, is a lifelong friend of mine. Back in the day, we did extensive research and probably constructed 150 variant systems using an "X" member, including the use of more than one in a complete system. What is attached below is a 'stick figure' drawing which lightly explains the difference.
If you talk about an "X" pipe, at least say and mean "true X-pipe" or state "Dr.Gas type X-pipe". There is a huge difference.
The individual who designed, and then sold the rights to Dr.Gas, is a lifelong friend of mine. Back in the day, we did extensive research and probably constructed 150 variant systems using an "X" member, including the use of more than one in a complete system. What is attached below is a 'stick figure' drawing which lightly explains the difference.
If you talk about an "X" pipe, at least say and mean "true X-pipe" or state "Dr.Gas type X-pipe". There is a huge difference.
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I've heard of Vettes using an X-pipe up front and an H-pipe by the axle to help with resonance.
Chicane, do you have any photo's of the "true x-pipe"? Any reason you think you never seen this style used? Interesting idea.
Chicane, do you have any photo's of the "true x-pipe"? Any reason you think you never seen this style used? Interesting idea.
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Staging Lane
Joined: Oct 2005
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Originally Posted by chicane
First off... let us define what a "true X-pipe" really is.
The individual who designed, and then sold the rights to Dr.Gas, is a lifelong friend of mine. Back in the day, we did extensive research and probably constructed 150 variant systems using an "X" member, including the use of more than one in a complete system. What is attached below is a 'stick figure' drawing which lightly explains the difference.
If you talk about an "X" pipe, at least say and mean "true X-pipe" or state "Dr.Gas type X-pipe". There is a huge difference.
The individual who designed, and then sold the rights to Dr.Gas, is a lifelong friend of mine. Back in the day, we did extensive research and probably constructed 150 variant systems using an "X" member, including the use of more than one in a complete system. What is attached below is a 'stick figure' drawing which lightly explains the difference.
If you talk about an "X" pipe, at least say and mean "true X-pipe" or state "Dr.Gas type X-pipe". There is a huge difference.
yeah, "true" x pipe.
hmm yes interesting. i wonder how much if any power a true x pipe setup would be worth on an LS1 over a dr gas type, it doesnt seem *too* hard to make. chicane would you care to expound a little more on the true x-pipe?thanks
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From: Las Vegas
Originally Posted by Birdie2000
Chicane, do you have any photo's of the "true x-pipe"?
Originally Posted by Birdie2000
Any reason you think you never seen this style used?
Originally Posted by hondo
I wonder how much if any power a true x pipe setup would be worth on an LS1 over a dr gas type, it doesnt seem *too* hard to make.
Originally Posted by hondo
chicane would you care to expound a little more on the true x-pipe?
I just need to know where you want me to start....
no need to get too in depth, any thing you want to talk about. maybe a little bit about pipe sizing of the x portion in relation to the rest of the system and maybe ideas on where to place it in the system which i guess would touch on negative scavenging and the thermal aspects?? how feasible would it be for someone to create this setup themselves? thanks
under the curve is the place to be
under the curve is the place to be
TECH Fanatic
Joined: Sep 2004
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From: Las Vegas
Originally Posted by hondo
.........Maybe a little bit about pipe sizing of the x portion in relation to the rest of the system and maybe ideas on where to place it in the system which i guess would touch on negative scavenging and the thermal aspects?? how feasible would it be for someone to create this setup themselves?
I would place it in the same position as shown in the drawing..... I havent done one on a late model, but I do think it would be..... "challenging".
The scavenging aspect should be looked at from the exhaust collector and also going into the muffler. Its not that big of deal with the true X design. A chambered type (Spintech/Flowmaster) muffler works better with a smaller size outlet to improve muffler scavenging (because of the volume difference). A flow thru muffler (Borla/Burns/Dynomax) can use either. I'll give you two examples which depend on the type of muffler being used.
1. Same tubing size throughout. 2.5" collector to 2.5" muffler inlet, with either a 2.5 or a 2.0" outlet.
2. Larger tubing after 'merge' collector. 3.5" collector to 3.5" muffler inlet, with a 3" muffler outlet (which acts as a 'merge' out of the muffler).
If you have access to mandrel bends or even crease bends, it shouldnt be hard at all to fabricate it..... if you have the room to fit it.
Originally Posted by chicane
if you have the room to fit it.
, esp. with our cars and the knock sensors. i would still like to try something like this, thanks for the reply. 