Exhaust Questions
Launching!
Joined: Nov 2012
Posts: 264
Likes: 0
From: Southwestern Ontario, Canada
Ya I'll have to look into it more. To me it seems not worth the 50 dollar savings since them cutting requires more labour Id think. Oh well. So you say 3 inch even after the split? Or just to the split? I don't wanna lose any low end torque lol. I was gonna do 3 inch to the split then 2.5... I'm sure I'll lose a little torque but not as much as full 3.
TECH Fanatic
Joined: Oct 2003
Posts: 1,101
Likes: 0
Ya I'll have to look into it more. To me it seems not worth the 50 dollar savings since them cutting requires more labour Id think. Oh well. So you say 3 inch even after the split? Or just to the split? I don't wanna lose any low end torque lol. I was gonna do 3 inch to the split then 2.5... I'm sure I'll lose a little torque but not as much as full 3.
Launching!
Joined: Nov 2012
Posts: 264
Likes: 0
From: Southwestern Ontario, Canada
I thought so. You think I'll lose a lot of low end torque with a set up like that? And is there any advantage to buying say a zzp downpipe vs. Just getting a shop to put in a 3 inch pipe with high flow cat instead?
TECH Fanatic
Joined: Oct 2003
Posts: 1,101
Likes: 0
i'm sure the exhaust companies did research and know more than i do, but i wouldnt think you would see that much of a torque lose going with 3 inch. got to figure most cat back systems are 3 inch, 3rd gen used that at 1/3 of the power.
even more so if your using stock manfolds and still have a cat, i would think that would be enough to keep velocity up.
even more so if your using stock manfolds and still have a cat, i would think that would be enough to keep velocity up.
Launching!
Joined: Nov 2012
Posts: 264
Likes: 0
From: Southwestern Ontario, Canada
The other thing though is that I don't see the advantage of paying for a downpipe when I can just get my shop to do a custom 3 inch pipe with a highflow cat for cheaper probably. All I need to know is if I need that little section of flex pipe (or whatever it is) that's at the start of the downpipe.
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Verdad Gallardo I would but I need a cat man. Thanks anyway. The only way you can get around it in Canada is if you get farm plates or your car is more than 15 years old. My truck already has farm plates so I can't do my car that way. We have yearly e-tests here in Ontario where they measure your co2 and carbon monoxide levels and ****. So I need to go highflow cat.
The other thing though is that I don't see the advantage of paying for a downpipe when I can just get my shop to do a custom 3 inch pipe with a highflow cat for cheaper probably. All I need to know is if I need that little section of flex pipe (or whatever it is) that's at the start of the downpipe.
The other thing though is that I don't see the advantage of paying for a downpipe when I can just get my shop to do a custom 3 inch pipe with a highflow cat for cheaper probably. All I need to know is if I need that little section of flex pipe (or whatever it is) that's at the start of the downpipe.
..........or you could just buy one that's already made
Launching!
Joined: Nov 2012
Posts: 264
Likes: 0
From: Southwestern Ontario, Canada
How come I need a flex pipe though? All the downpipes look the same the way the exhaust enters, goes down on an angle then the pipe levels out. Maybe I'm getting the terms mixed up but on that straight section there is that cross braided steel section or whatever that's pretty small.
On The Tree
Joined: Dec 2012
Posts: 173
Likes: 3
From: Chattanooga, TN
How come I need a flex pipe though? All the downpipes look the same the way the exhaust enters, goes down on an angle then the pipe levels out. Maybe I'm getting the terms mixed up but on that straight section there is that cross braided steel section or whatever that's pretty small.
On The Tree
Joined: Dec 2012
Posts: 173
Likes: 3
From: Chattanooga, TN
i was looking at the dynomax VT before i decided to go with the magnaflow catback. They look promising.
TECH Fanatic
Joined: Oct 2003
Posts: 1,101
Likes: 0
i like flowmaster, i went with their 1 chamber race muffler, single in dual out. its very small and goes in right where the y-pipe would be.
save money only need 1, and dont need to have a ypipe.
lol
regarding flow, i dont see it being a restrictions all it is a big chamber with a < in it.
its not like the crappy f-body cross flow mufflers.
save money only need 1, and dont need to have a ypipe.
lol
regarding flow, i dont see it being a restrictions all it is a big chamber with a < in it.
its not like the crappy f-body cross flow mufflers.
Launching!
Joined: Nov 2012
Posts: 264
Likes: 0
From: Southwestern Ontario, Canada
I talked to an old F-body guy today at his exhaust shop. He's the no bullshit kind of person and he claims unless i'm doing serious power there's no reason to change out the stock cat. He was basically saying a mnadrel bent cat back will be the best bang for the bung. I don't know who to believe lol. The reason he says buy a cat-back kit is because they usually do engineer the systems and are dyno proven. He has an older camaro that he dyno'd with different exhaust and there was a 2 hp difference lol. So He left it stock. He also did a chip foose charger a little while ago and the only reason they swapped out the cats on the car was to make the exhaust fit more snuggly so that it didn't hit on bumps since the car was lowered.
So idk, i'll probably just forget about the cat for now and do a cat-back.
So idk, i'll probably just forget about the cat for now and do a cat-back.
On The Tree
Joined: Dec 2012
Posts: 173
Likes: 3
From: Chattanooga, TN
I talked to an old F-body guy today at his exhaust shop. He's the no bullshit kind of person and he claims unless i'm doing serious power there's no reason to change out the stock cat. He was basically saying a mnadrel bent cat back will be the best bang for the bung. I don't know who to believe lol. The reason he says buy a cat-back kit is because they usually do engineer the systems and are dyno proven. He has an older camaro that he dyno'd with different exhaust and there was a 2 hp difference lol. So He left it stock. He also did a chip foose charger a little while ago and the only reason they swapped out the cats on the car was to make the exhaust fit more snuggly so that it didn't hit on bumps since the car was lowered.
So idk, i'll probably just forget about the cat for now and do a cat-back.
So idk, i'll probably just forget about the cat for now and do a cat-back.
You can only engineer so much knowing the magna flows bends and diameter we can improve or keep the same level of performance if you wanna do custom exhaust however they don't adress the downpipe the cat really isn't restrictive at most power levels that most of us will achieve. That main part that i see needing to be addressed is porting the rear outlet of the factory manifold if using a aftermarket downpipe.