New Exhaust Thoughts... Gimme Ideas!
#1
![Question](https://ls1tech.com/forums/images/icons/icon5.gif)
Im wanting to run a true duel setup on my 94' Camaro. Im torn between 2.5" and 3" and whether or not to run cats. The car is pretty much a daily driver (minus snow). The car is lowered 1.2" on all 4's
My Questions:
-How much will duel 2.5" support vs 3"? (Id rather have more ground clearance, but i want room to grow aswell)
-How much HP with high flow cats restrict ?
I only want to run cats because there have been of EPC police around. With that and living in NYS, it makes me nervous.
I Just dont want to build a 2.5" exhaust setup and have it restrict to much HP. Yet i also dont want to run a 3" setup and have serious clearance issues.... and Yes, i searched... Just give me your input guys! Thanks
My Questions:
-How much will duel 2.5" support vs 3"? (Id rather have more ground clearance, but i want room to grow aswell)
-How much HP with high flow cats restrict ?
I only want to run cats because there have been of EPC police around. With that and living in NYS, it makes me nervous.
I Just dont want to build a 2.5" exhaust setup and have it restrict to much HP. Yet i also dont want to run a 3" setup and have serious clearance issues.... and Yes, i searched... Just give me your input guys! Thanks
#2
TECH Addict
iTrader: (1)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
What headers? If your comming off stock manifolds whats the point but if you come off shorty, mid length, or long tubes it's different. I have no idea what kind of emissions crap you all have up there but here is my 2cents. Shorty or mid lengths 2.5 all the way or 2.5 back to the axle and then dump. Long tubes you can do different things like 3inch off the collector and into the cat and then step it down to 2.5 the rest of the way or due 2.5 all the way. or do 3 all the way and use a watts link to fit it over the axle on both sides. or dump at the axle and use cats. should sound good but it will be high still on the db meter.
#3
TECH Veteran
iTrader: (12)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Per David Vizard:
A 2.75” (stock) single system is good for a 310hp engine with zero loss…
A 3” Single system is good for a 370hp engine with zero loss…
A 3.5” Single system is good for a 503hp engine with zero loss…
A 4” Single system is good for a 657hp engine with zero loss…
A 2.25” dual system is good for a 457hp engine with zero loss…
A 2.5” dual system is good for a 513hp engine with zero loss…
A 3” dual system is good for a 812hp engine with zero loss…
I had high flow cats on my ORY way back. The shape of the torque curve took a hit and the power dropped around 10 points. They also tamed the exhaust tone a good bit. I designed my TD's to take the e-cutoff pipes off and switch to high flow cats should the need ever come. The need has never come.
A 2.75” (stock) single system is good for a 310hp engine with zero loss…
A 3” Single system is good for a 370hp engine with zero loss…
A 3.5” Single system is good for a 503hp engine with zero loss…
A 4” Single system is good for a 657hp engine with zero loss…
A 2.25” dual system is good for a 457hp engine with zero loss…
A 2.5” dual system is good for a 513hp engine with zero loss…
A 3” dual system is good for a 812hp engine with zero loss…
I had high flow cats on my ORY way back. The shape of the torque curve took a hit and the power dropped around 10 points. They also tamed the exhaust tone a good bit. I designed my TD's to take the e-cutoff pipes off and switch to high flow cats should the need ever come. The need has never come.
#5
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Thanks for the replies guys i should of stated what i have.
I have LT's with currently an ORY. I do not have a panhard bar relocator which is making me abit nervous with the 3" piping going over the axle.
I dont want to have something stupid loud as in dumped classic chambered before the axles. I am going to run it over the axle and out the back.
That wouldnt be a problem for me. The only thing is if i were to get pulled over by a DEP cop or something equivalent. I dont want to be caught with no cats... Ive heard stories around me that they even check the toxicity of your exhaust on the street :s
Id imagine that 2 high flight cats attached directly to the headers, wont restrict to much flow once hot.. i could be wrong tho
I have LT's with currently an ORY. I do not have a panhard bar relocator which is making me abit nervous with the 3" piping going over the axle.
I dont want to have something stupid loud as in dumped classic chambered before the axles. I am going to run it over the axle and out the back.
Id imagine that 2 high flight cats attached directly to the headers, wont restrict to much flow once hot.. i could be wrong tho
Trending Topics
#13
TECH Senior Member
iTrader: (2)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Catback with an electric cutout. Best of both worlds when you want it.
/thread
http://www.youtube.com/watch?v=3uZxUmaXqHE
/thread
http://www.youtube.com/watch?v=3uZxUmaXqHE
Last edited by RamAir95TA; 10-21-2010 at 06:08 AM.
#14
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
if i had to do it all again, and i will. i would run long tubes, either pacesetter or one of the good quality ebay headers at the time. that solves that part.
Y-pipe would be an offroad y pipe. and then i would run a magnaflow catback.
if no y pipe, i would still run magnaflows on 2.5" duals with an x pipe dumped befor the axle with the dumps at a 45* to the ground. Not sure which magnaflows i would run, but i have the magnapacks on this setup on my lincoln and i dont much like it for that car. might fit a fbody well though. if not magnaflows maybe a set of borla straight through mufflers.
another idea that works well is long tubes, offroad y pipe, slp loudmouth with a borla in place of the slp resonator. its pretty loud though. the reason i say magnaflow catback is because it should be relatively quiet and not draw enough attention that they would get out the mirrors and look under the car for cats.
Y-pipe would be an offroad y pipe. and then i would run a magnaflow catback.
if no y pipe, i would still run magnaflows on 2.5" duals with an x pipe dumped befor the axle with the dumps at a 45* to the ground. Not sure which magnaflows i would run, but i have the magnapacks on this setup on my lincoln and i dont much like it for that car. might fit a fbody well though. if not magnaflows maybe a set of borla straight through mufflers.
another idea that works well is long tubes, offroad y pipe, slp loudmouth with a borla in place of the slp resonator. its pretty loud though. the reason i say magnaflow catback is because it should be relatively quiet and not draw enough attention that they would get out the mirrors and look under the car for cats.
#15
TECH Veteran
iTrader: (12)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
The only thing I will add to the discussion of loudness is my TD's are not really any louder than my closed Borla catback was. In fact I am convinced that my TD's at idle are a little more quiet because it does not produce that low frequency boom that I heard in the house with the Borla. WOT is about the same. Of course I am running a full size Magnaflow muffler so it should not be loud like what most people typically put on their TD's. The other HUGE difference with TD's is there is no rasp like what you get with LT's and a ORY pipe. My old setup had the machine gun like rasp at low load around 2K RPM. Sounded like ****. That was my primary reason for making the TD's. All rasp is 100% gone.
IMO the sound volume is just right and if I want Nascar loud I just crack the switch and the dual e-cutouts open up. My cutouts are in fact louder than dumped before the axle cause they are under your feet.
With regards to weight. I used stainless Magnaflow mandrel bent pipes which are thin wall thickness and not very heavy compared to other aluminized pipes I have seen. The only problem is welding them with stainless wire is very tricky as its easy to burn through.
FTR I am not convinced the TD's gave me any more power over the Borla catback. But the time, money and investment was worth it for the sound and fun in making them.
IMO the sound volume is just right and if I want Nascar loud I just crack the switch and the dual e-cutouts open up. My cutouts are in fact louder than dumped before the axle cause they are under your feet.
With regards to weight. I used stainless Magnaflow mandrel bent pipes which are thin wall thickness and not very heavy compared to other aluminized pipes I have seen. The only problem is welding them with stainless wire is very tricky as its easy to burn through.
FTR I am not convinced the TD's gave me any more power over the Borla catback. But the time, money and investment was worth it for the sound and fun in making them.
#16
TECH Apprentice
iTrader: (5)
Join Date: Jan 2007
Location: Hays
Posts: 371
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Catback with an electric cutout. Best of both worlds when you want it.
/thread
http://www.youtube.com/watch?v=3uZxUmaXqHE
/thread
http://www.youtube.com/watch?v=3uZxUmaXqHE
#17
TECH Fanatic
iTrader: (4)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
The only thing I will add to the discussion of loudness is my TD's are not really any louder than my closed Borla catback was. In fact I am convinced that my TD's at idle are a little more quiet because it does not produce that low frequency boom that I heard in the house with the Borla. WOT is about the same. Of course I am running a full size Magnaflow muffler so it should not be loud like what most people typically put on their TD's. The other HUGE difference with TD's is there is no rasp like what you get with LT's and a ORY pipe. My old setup had the machine gun like rasp at low load around 2K RPM. Sounded like ****. That was my primary reason for making the TD's. All rasp is 100% gone.
IMO the sound volume is just right and if I want Nascar loud I just crack the switch and the dual e-cutouts open up. My cutouts are in fact louder than dumped before the axle cause they are under your feet.
With regards to weight. I used stainless Magnaflow mandrel bent pipes which are thin wall thickness and not very heavy compared to other aluminized pipes I have seen. The only problem is welding them with stainless wire is very tricky as its easy to burn through.
FTR I am not convinced the TD's gave me any more power over the Borla catback. But the time, money and investment was worth it for the sound and fun in making them.
IMO the sound volume is just right and if I want Nascar loud I just crack the switch and the dual e-cutouts open up. My cutouts are in fact louder than dumped before the axle cause they are under your feet.
With regards to weight. I used stainless Magnaflow mandrel bent pipes which are thin wall thickness and not very heavy compared to other aluminized pipes I have seen. The only problem is welding them with stainless wire is very tricky as its easy to burn through.
FTR I am not convinced the TD's gave me any more power over the Borla catback. But the time, money and investment was worth it for the sound and fun in making them.
#19
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Im glad to see both sides of the arguments on this topic...
My current setup isnt that loud. In fact its pretty docile.. Ebay Headers, ORY, classic chambered in my I pipe, and a hooker aerochamber in the back. Single in single out. While i do have a cutout, i keep having bad luck with them.. There electric motors keep falling off while im driving
I Love the sound it makes, from idle to redline. But im wanting something alittle bit different.
Theirs something just so Badass, and intimidating about a nicely laid out true duel setup! My thoughts would be for 2 classic chambered mufflers where the I pipe would go. And then in the back either a magnaflow duel in, duel out muffler. Or, two vibrant ultra quiet resonators... There insanely good from what ive seen. My friend held one up to his mouth and screamed into it... all i can say is that it Works!
My current setup isnt that loud. In fact its pretty docile.. Ebay Headers, ORY, classic chambered in my I pipe, and a hooker aerochamber in the back. Single in single out. While i do have a cutout, i keep having bad luck with them.. There electric motors keep falling off while im driving
![Bang Head](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_banghead.gif)
Theirs something just so Badass, and intimidating about a nicely laid out true duel setup! My thoughts would be for 2 classic chambered mufflers where the I pipe would go. And then in the back either a magnaflow duel in, duel out muffler. Or, two vibrant ultra quiet resonators... There insanely good from what ive seen. My friend held one up to his mouth and screamed into it... all i can say is that it Works!
#20
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I liked this guys idea, although I may go with the 16" powersticks and I want to run them all the way out the back.
https://ls1tech.com/forums/lt1-lt4-m...s-video-3.html
https://ls1tech.com/forums/lt1-lt4-m...s-video-3.html