View Poll Results: TD's or Y pipe?
true duals
46
76.67%
Y pipe and catback, possibly a cutout
14
23.33%
Voters: 60. You may not vote on this poll
True Duals vs y pipe setup
01-19-2009, 12:57 PM
#63
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https://ls1tech.com/forums/dynamomet...-500-rwhp.html
I am just doing what is known to work well. Maybe you are the one who is a bit misinformed.
As do I.
01-19-2009, 06:55 PM
#64
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I am not misinformed at all.
https://ls1tech.com/forums/dynamomet...-500-rwhp.html
I am just doing what is known to work well. Maybe you are the one who is a bit misinformed.
https://ls1tech.com/forums/dynamomet...-500-rwhp.html
I am just doing what is known to work well. Maybe you are the one who is a bit misinformed.
01-19-2009, 07:53 PM
#65
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He only lost 1rwhp from open headers with 20" extensions to the y-pipe setup. There is also no rasp like most y's have, and no drone like almost every td setup has.
01-21-2009, 07:16 PM
#69
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) I really like how the mufflex sounds with a flowmaster, so I think I would like the setup you're talking about with a single chamber. Maybe dump it at the back like the mufflex but add a cutout somewhere up front. 
01-26-2009, 03:14 PM
#73
I haven't voted, due to the fact that I have never heard a True Dual System in person. I'd have to say, though, that each individual vehicle will sound a little different from another with the same setup. So until you put the system on YOUR car, you really won't know what it sounds like. I might also add that I am not a fan of dumps. Not the sound, but the looks. It's like you're running around with unfinished exhaust. Please spend some time to find tips you like and extend your pipes to the back of the car.
01-26-2009, 03:23 PM
#74
Lots of ways to skin this cat, fewer on our cars due to clearance, etc. For comparison, let me give you rough cross sectional area, which indicates maximum flow:
single 3" - 7 square inches
single 3.5" - 9.62 sq in
dual 2.5" - 9.8 sq in
single 4" - 12.5 sq in
dual 3" - 14.1 sq in
Obviously, you add Xs, Hs, and merges from one to the other, that complicates things BUT - going from single 3" y pipe to true 2.5" duals give you theoretically about 40% more flow. It may not be super noticeable below 350whp but it is measurable below that and moreso as power increases.
Another note, NO mod we do increases power by a fixed number, it increases by % and multiplies out to HP. Even then, it's not linear - but you should get the idea.
The nice pic of the y pipe above (4 inch with flow merge) is a nice Y but damn near dumps, not a full system by most street standards. Y setups fit closer to stock, are lighter, and cheaper since there are fewer parts. Dual setups are heavier, more expensive, have more potential clearance issues, but sound better and make more power.
Short version - properly done full length duals will always outperform proper full length y pipe and cat back setups. It's hard to do apples to apples since there are SO many variables on these systems and art plays a big role but the math does not lie regarding true potential. Pick what fits your needs best, usually it's budget first for most of us.
single 3" - 7 square inches
single 3.5" - 9.62 sq in
dual 2.5" - 9.8 sq in
single 4" - 12.5 sq in
dual 3" - 14.1 sq in
Obviously, you add Xs, Hs, and merges from one to the other, that complicates things BUT - going from single 3" y pipe to true 2.5" duals give you theoretically about 40% more flow. It may not be super noticeable below 350whp but it is measurable below that and moreso as power increases.
Another note, NO mod we do increases power by a fixed number, it increases by % and multiplies out to HP. Even then, it's not linear - but you should get the idea.
The nice pic of the y pipe above (4 inch with flow merge) is a nice Y but damn near dumps, not a full system by most street standards. Y setups fit closer to stock, are lighter, and cheaper since there are fewer parts. Dual setups are heavier, more expensive, have more potential clearance issues, but sound better and make more power.
Short version - properly done full length duals will always outperform proper full length y pipe and cat back setups. It's hard to do apples to apples since there are SO many variables on these systems and art plays a big role but the math does not lie regarding true potential. Pick what fits your needs best, usually it's budget first for most of us.
01-27-2009, 02:30 PM
#75
not really....
Flow isnt really the issue. Its proper scavenging. A Y pipe is the best inductor hence when properly setup makes an excellent system. And when is dumps not a street system i run it... and so do... well hundreds of other cars...
Most people dont run duals out the back... hence they are lighter than a catback Y setup. Their not more expensive IF you are going to run a catback. They sound better than Crappy Y's because of the rasp associated with a bad merge. The Y pipe pictured does NOT suffer from that. My setup IS the one pictured and it sounds just like dual bullets.. Except mines a little deeper.
So.... Uhhh... What did you answer?
Flow isnt really the issue. Its proper scavenging. A Y pipe is the best inductor hence when properly setup makes an excellent system. And when is dumps not a street system i run it... and so do... well hundreds of other cars...
Most people dont run duals out the back... hence they are lighter than a catback Y setup. Their not more expensive IF you are going to run a catback. They sound better than Crappy Y's because of the rasp associated with a bad merge. The Y pipe pictured does NOT suffer from that. My setup IS the one pictured and it sounds just like dual bullets.. Except mines a little deeper.
So.... Uhhh... What did you answer?
01-27-2009, 05:02 PM
#77
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i just had a custom cat back made up with a 3" cut out and 3" IN/OUT bullet, and it has NO rasp what so ever and it is probably the deepest sounding f body i have heard but i was surprised through the bullet muffler even the cut out i have no rasp what so ever and it is INCREDIBLY DEEP TONE and pretty loud too. I will post a video tomorrow and pics
01-27-2009, 06:42 PM
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not really....
Flow isnt really the issue. Its proper scavenging. A Y pipe is the best inductor hence when properly setup makes an excellent system. And when is dumps not a street system i run it... and so do... well hundreds of other cars...
Most people dont run duals out the back... hence they are lighter than a catback Y setup. Their not more expensive IF you are going to run a catback. They sound better than Crappy Y's because of the rasp associated with a bad merge. The Y pipe pictured does NOT suffer from that. My setup IS the one pictured and it sounds just like dual bullets.. Except mines a little deeper.
So.... Uhhh... What did you answer?
Flow isnt really the issue. Its proper scavenging. A Y pipe is the best inductor hence when properly setup makes an excellent system. And when is dumps not a street system i run it... and so do... well hundreds of other cars...
Most people dont run duals out the back... hence they are lighter than a catback Y setup. Their not more expensive IF you are going to run a catback. They sound better than Crappy Y's because of the rasp associated with a bad merge. The Y pipe pictured does NOT suffer from that. My setup IS the one pictured and it sounds just like dual bullets.. Except mines a little deeper.
So.... Uhhh... What did you answer?