Anyone ever try to fab an exhaust like this?
07-01-2008, 06:42 AM
#1
Anyone ever try to fab an exhaust like this? Thinking about trying this. Off the LT"s go back as far as possible (all depending) with straight 3" pipe into a 3" X. From there go immediately to a 3" Y into the factory pipe going over the rear to the muffler and tails. Wonder how it would work?
I remember reading something long ago how as exhaust gas cools it doesn't need the pipe size for flow. Hence the large runs of 3" straight piping may do the trick and not lose much HP.
I remember reading something long ago how as exhaust gas cools it doesn't need the pipe size for flow. Hence the large runs of 3" straight piping may do the trick and not lose much HP.
Last edited by Intercooler2; 12-09-2008 at 08:47 PM.
07-01-2008, 09:06 AM
#4
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Pointless putting a crossover in there then combining the exhaust in a Y. Crossover pipe would only be effective for True dual exhaust. What you have drawn up is a Y pipe exhaust that combines and splits twice.
The idea of smaller piping toward the back of the car has been done similiar to that by a member here recently using a 3" Y pipe going into a 4" pipe then narrowing down into a 3.5" then to a 3" near the back of the car where the exhaust gases cool way down.
The idea of smaller piping toward the back of the car has been done similiar to that by a member here recently using a 3" Y pipe going into a 4" pipe then narrowing down into a 3.5" then to a 3" near the back of the car where the exhaust gases cool way down.
07-01-2008, 09:11 AM
#5
Pointless putting a crossover in there then combining the exhaust in a Y. Crossover pipe would only be effective for True dual exhaust. What you have drawn up is a Y pipe exhaust that combines and splits twice.
The idea of smaller piping toward the back of the car has been done similiar to that by a member here recently using a 3" Y pipe going into a 4" pipe then narrowing down into a 3.5" then to a 3" near the back of the car where the exhaust gases cool way down.
The idea of smaller piping toward the back of the car has been done similiar to that by a member here recently using a 3" Y pipe going into a 4" pipe then narrowing down into a 3.5" then to a 3" near the back of the car where the exhaust gases cool way down.
Last edited by Intercooler2; 12-09-2008 at 08:47 PM.
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07-01-2008, 12:26 PM
#9
Don't want a Y up close to the headers at all! Kind of like how track cars use header extensions to tuned lengths (for power) at the track, but in this case I want to give the exhaust coming out of the headers the least amount of resistance for the longest distance (3" pipe) all the way back to the Y near the tailpipe tie-in. Should give the gases time to cool and not as much exhaust sizing is needed to channel it out. I have never been much of a belly button person so I try different things and live with the results. Shouldn't take a whole lot of stuff using the stock muffler and tails.
07-01-2008, 12:47 PM
#10
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this just seems like one of those ideas where, you get half way through, and you just say f this. i don't think the cooling of the gas, and the y being more towards the back is really going to help you any. its been said many time before, all the headers for our cars do the same thing, no performance gains over one or the other, and you don't really get gains from td's over a y pipe setup. if yourself or someone you know can do that sort of work then do it.
07-01-2008, 01:38 PM
#13
basically, whatever y-pipe you can buy will be the "best" you can do with these cars. there is very little room underneath and almost all of the designs use all of the room they reasonably can for a "free-er" flowing exhaust.
the only thing putting a y-pipe after an x-pipe is going to do for you is be a pain in the *** to install.
the only thing putting a y-pipe after an x-pipe is going to do for you is be a pain in the *** to install.
07-01-2008, 02:19 PM
#14
True! These headers will need a custom Y made up front or in the rear but custom for sure. I will post pics as it goes together and get dyno numbers after I install the headers, TB and underdrive. I'm hoping to pick up over the stock ET numbers and be in the 12.7 range at 110 or better.
07-01-2008, 08:50 PM
#15
Most of us are hear to help. Me myself am trying to offer good sound advice. I have built more exhaust systsems for these cars than most and I know what works.
When you say you dont want a y that close to the headers, well, that tells me that you really dont understand what works. Not just on our cars but any car.
When you say you dont want a y that close to the headers, well, that tells me that you really dont understand what works. Not just on our cars but any car.
07-01-2008, 08:52 PM
#16
Most of us are hear to help. Me myself am trying to offer good sound advice. I have built more exhaust systsems for these cars than most and I know what works.
When you say you dont want a y that close to the headers, well, that tells me that you really dont understand what works. Not just on our cars but any car.
When you say you dont want a y that close to the headers, well, that tells me that you really dont understand what works. Not just on our cars but any car.
But can you fit 3" pipe in a Y up there?
07-01-2008, 10:11 PM
#17
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after building my first true dual system (it sounding badass) i loved it until i looked at it while the car was on the ground and the pipes were in the grass, i realized that for a street driven car you have to make some sacrifices. space is at a high premium, dont take that for granted. i rebuilt my exhaust completely from the ground up with flow and clearance in mind. i have the highest tucked 3 inch true duals of any car i have seen. if only i would have studied all those coke can pictures from the sticky i wouldn't have had to do it twice.
07-01-2008, 10:42 PM
#18
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Don't want a Y up close to the headers at all! Kind of like how track cars use header extensions to tuned lengths (for power) at the track, but in this case I want to give the exhaust coming out of the headers the least amount of resistance for the longest distance (3" pipe) all the way back to the Y near the tailpipe tie-in. Should give the gases time to cool and not as much exhaust sizing is needed to channel it out. I have never been much of a belly button person so I try different things and live with the results. Shouldn't take a whole lot of stuff using the stock muffler and tails.
Track cars only use around 12-18" extensions. The stock Y on an F car is farther back than that. Regardless yes you could do a setup like you are looking for easily.. just run a dual pipe setup all the way to the axle then put a Flowmaster Y in and connect it to the stock exhaust.
07-01-2008, 10:59 PM
#19
Track cars only use around 12-18" extensions. The stock Y on an F car is farther back than that. Regardless yes you could do a setup like you are looking for easily.. just run a dual pipe setup all the way to the axle then put a Flowmaster Y in and connect it to the stock exhaust.
