swappers, what did you do for exhaust? Options

[brianforster]

now we all know that 3" is pretty standard for all our swappers.

what did you do for exhaust? custom from a shop close to you? make it on your own?

whatd the shop quote you?

how much was it if you did it yourself?

looking for general price quotes here, trying to plan out the finishing touches of the swap and the only exhaust shop i called said "theyd have to look at the car".

to cut down on costs i think im going to buy my own cat and muffler from summit (43 bucks for cat, 18 bucks for muffler, summit turbo muflers for the win!) i just wanna know if you guys have any idea what it will cost. i already have a downpipe.

i tried searching, but everyone just says they have 3" exhaust, not where or how they aquired it, and since they are all custom, was wondering what everyone did for it!

thanks as always
-brian

[NuclearHappineS]

about the 4" exhaust

one of the big supra shops, either titan or horsepower freaks (i think it's titan actually) sells a 4" supra catback ...

if u go to their webpage they'll provide their '1st hand' commentary on why/when you'd need it...

i think to4r also had a dyno run of most supra exhausts starting with the oldschool greddy SP and working up to the newer titanium/stainluss catbacks (so from 2.38" up to some 3" and maybe slightly over 3" catbacks) with dyno data for all of it...

as far as titan goes they saw something like a 40hp gain pulling off a 'high flow' air filter on a 600 hp car... their exhaust (4") was worth over 120hp or so on some 700+ hp car that came in with a 3" if i remember correctly...

i just want to say this though...exhaust has to do with area which is related to diameter squared

2^2 = 4
2.25^2=5.0625
2.5^2=6.25
3^2=9
3.5^2=12.25
4^2=16

so the next step up if u had a high hp 3sgte isn't a 4" yet...

[CheesyLobster]

i just want to say this though...exhaust has to do with area which is related to diameter squared

2^2 = 4
2.25^2=5.0625
2.5^2=6.25
3^2=9
3.5^2=12.25
4^2=16

That would be if you are running a rectangular shaped exhaust. For area calculations it would be diameter * Pi (3.14159...) or volume=area * legnth of exhaust.

[jgreening]

i just want to say this though...exhaust has to do with area which is related to diameter squared

2^2 = 4
2.25^2=5.0625
2.5^2=6.25
3^2=9
3.5^2=12.25
4^2=16

That would be if you are running a rectangular shaped exhaust. For area calculations it would be diameter * Pi (3.14159...) or volume=area * legnth of exhaust.

Actually, that would be a square (not a rectangular) shaped exhaust. Diameter * pi would be the circumfrance. To determine area of the exhaust, you use radius squared * pi. Therefore, the following would be the correct calculations to determine area of the cross section of the pipe:

2 inch piping = 3.14 sq. inches of area of cross section of pipe
2.25 = 3.97
2.5 = 4.91
3 = 7.07
3.5 = 9.62
4.0 = 12.56

EDIT: Nuke beat me.

This post has been edited by jgreening: Mar 13, 2006 - 5:18 PM

[CheesyLobster]

i just want to say this though...exhaust has to do with area which is related to diameter squared

2^2 = 4
2.25^2=5.0625
2.5^2=6.25
3^2=9
3.5^2=12.25
4^2=16

That would be if you are running a rectangular shaped exhaust. For area calculations it would be diameter * Pi (3.14159...) or volume=area * legnth of exhaust.

Actually, that would be a square (not a rectangular) shaped exhaust. Diameter * pi would be the circumfrance. To determine area of the exhaust, you use radius squared * pi. Therefore, the following would be the correct calculations to determine area of the cross section of the pipe:

2 inch piping = 3.14 sq. inches of area of cross section of pipe
2.25 = 3.97
2.5 = 4.91
3 = 7.07
3.5 = 9.62
4.0 = 12.56

EDIT: Nuke beat me.

Whopse. yeah a=piR^2, and i meant rectangular as in rectangular prism.