Been reading Mike Mavigian "Performance Exhaust Systems" book and have a question about a x pipe design.
I have some 2.5" speedway cast "ram horn" manifolds coming and a few pieces left over from a few exhaust kits to build the below routing to get to the passenger side.
Exhaust from the drivers side will make a 90 off the manifold towards the passenger side, go under the pan, then make another 90 towards the rear. Exhaust off the passenger side will make a 90 towards the rear.
The above can not be changed due to packaging.
Once past the 90 sections I will have around 14" wide, around 8" tall, and around 90" long from the back of the motor on the passenger side and have enough room above the axle I do not need a hoop and can have the two pipes a inch apart shoot right out the rear.
What I am thinking is making the below "muffler". Basically cutting the shape(4 together) on a table then welding the top and bottom sections together being 2.6" tall before merging 2 1/2 pipes at the front and rear of them.
I am thinking of having 8 of these X sections in a row for around a 70" long 6" wide and around 3" tall muffler.
The dotted line(mirrored) is where I am guessing the most sound reflection would be done. The idea of tapering the muffler down from a 2 1/2 to 2 3/4(slowing flow) to 1 3/4(increasing flow) before it enters the 3" section then having it go back into a 1 3/4 section (increasing flow) then to a 2 3/4(slowing flow) then to 2 1/2(increasing flow) is that it should create a pulse to scavenge. All the while 1"(per side of 2 1/2 pipe) is unrestricted and passes completely through.
I am thinking having 8 of them should reduce exhaust noise significantly while providing enough savaging for my mild 350/355 to flow easily into the 7000rpm range.
I am thinking of 1/8 steel for construction which should place the thing between 52 and 56 lbs. Not that bad considering the thing will end up around 70" long.
Here is the rough design;
I am thinking it will flow like this(super rough) blue being nonrestrictive, green being less restrictive, pink being restrictive and black being scavenging areas.
I would Like some feedback. On if this thing is going to be restrictive as heck. If it is going to drone or vibrate terribly. Or any helpful information you can give to improve upon it .
I have some 2.5" speedway cast "ram horn" manifolds coming and a few pieces left over from a few exhaust kits to build the below routing to get to the passenger side.
Exhaust from the drivers side will make a 90 off the manifold towards the passenger side, go under the pan, then make another 90 towards the rear. Exhaust off the passenger side will make a 90 towards the rear.
The above can not be changed due to packaging.
Once past the 90 sections I will have around 14" wide, around 8" tall, and around 90" long from the back of the motor on the passenger side and have enough room above the axle I do not need a hoop and can have the two pipes a inch apart shoot right out the rear.
What I am thinking is making the below "muffler". Basically cutting the shape(4 together) on a table then welding the top and bottom sections together being 2.6" tall before merging 2 1/2 pipes at the front and rear of them.
I am thinking of having 8 of these X sections in a row for around a 70" long 6" wide and around 3" tall muffler.
The dotted line(mirrored) is where I am guessing the most sound reflection would be done. The idea of tapering the muffler down from a 2 1/2 to 2 3/4(slowing flow) to 1 3/4(increasing flow) before it enters the 3" section then having it go back into a 1 3/4 section (increasing flow) then to a 2 3/4(slowing flow) then to 2 1/2(increasing flow) is that it should create a pulse to scavenge. All the while 1"(per side of 2 1/2 pipe) is unrestricted and passes completely through.
I am thinking having 8 of them should reduce exhaust noise significantly while providing enough savaging for my mild 350/355 to flow easily into the 7000rpm range.
I am thinking of 1/8 steel for construction which should place the thing between 52 and 56 lbs. Not that bad considering the thing will end up around 70" long.
Here is the rough design;
I am thinking it will flow like this(super rough) blue being nonrestrictive, green being less restrictive, pink being restrictive and black being scavenging areas.
I would Like some feedback. On if this thing is going to be restrictive as heck. If it is going to drone or vibrate terribly. Or any helpful information you can give to improve upon it .