Exhaust Options for CME and quiet
10-12-2015, 10:59 AM
#1
Exhaust Options for CME and quiet Car currently has a borla adjustable catback BOR-14780, Pace Setter Coated longtubes, Pace Setter Y 3" with cutouts.
In the present state, the car is too loud and I'm not a fan of the way the borla BOR-14780 looks.
http://static.summitracing.com/globa.../BOR-14780.jpg
I want:
-CME look
-Quiet as I can be when cutouts are closed
Is $1500 what I should expect to pay to get a quiet CME setup that I can make loud with the press of a button? Here's what I was thinking:
- Magnaflow 14419 in the I-Pipe - $80
- 2 Magnaflow 12867 behind the axles - $210
- CME tips, elbows and valence - $600
- Electric Cutouts from DMH - $320
- Exhaust shop labor - $100
- Body shop labor - $200
Would Dynomax Ultra Flo Welded Muffler 17227 be quieter?
In the present state, the car is too loud and I'm not a fan of the way the borla BOR-14780 looks.
http://static.summitracing.com/globa.../BOR-14780.jpg
I want:
-CME look
-Quiet as I can be when cutouts are closed
Is $1500 what I should expect to pay to get a quiet CME setup that I can make loud with the press of a button? Here's what I was thinking:
- Magnaflow 14419 in the I-Pipe - $80
- 2 Magnaflow 12867 behind the axles - $210
- CME tips, elbows and valence - $600
- Electric Cutouts from DMH - $320
- Exhaust shop labor - $100
- Body shop labor - $200
Would Dynomax Ultra Flo Welded Muffler 17227 be quieter?
Last edited by 5.7stroker; 10-12-2015 at 02:10 PM.
10-12-2015, 06:38 PM
#2
Imo, I don't think the Dynomax dual outlet will be any quieter, probably about the same. The advantage would be that it'll likely be easier to configure so it would probably fit better, an cost less overall.
What I'd probably go with is the Magnaflow 14419 in the I-pipe followed by a single E-cutout and either a Dynomax 17227 (2.5" dual exits) or 17536 (3" dual exits). Then into you CME setup.
What I'd probably go with is the Magnaflow 14419 in the I-pipe followed by a single E-cutout and either a Dynomax 17227 (2.5" dual exits) or 17536 (3" dual exits). Then into you CME setup.
10-12-2015, 09:03 PM
#4
The gm factory Z28/SS muffler is quiet, but it's heavy and doesn't flow very good. I guess if you already have one, and it's in good condition you could go that route, if you don't mind it not flowing well, but I wouldn't buy one.
BTW, does it run rich when you have the cut-out open ?
If it doesn't then disregard the info below.
The reason I ask is that if the cutouts are closer then 30" to the O2 sensors it can cause the O2s to read a false lean condition and make it run rich. Almost all O2s need a distance of at least 10 time the exhaust pipe diameter from the exhaust exit to prevent possible O2 level errors.
BTW, does it run rich when you have the cut-out open ?
If it doesn't then disregard the info below.
The reason I ask is that if the cutouts are closer then 30" to the O2 sensors it can cause the O2s to read a false lean condition and make it run rich. Almost all O2s need a distance of at least 10 time the exhaust pipe diameter from the exhaust exit to prevent possible O2 level errors.
Last edited by 99Bluz28; 10-12-2015 at 09:19 PM.
10-12-2015, 09:35 PM
#5
The gm factory Z28/SS muffler is quiet, but it's heavy and doesn't flow very good. I guess if you already have one, and it's in good condition you could go that route, if you don't mind it not flowing well, but I wouldn't buy one.
BTW, does it run rich when you have the cut-out open ?
If it doesn't then disregard the info below.
The reason I ask is that if the cutouts are closer then 30" to the O2 sensors it can cause the O2s to read a false lean condition and make it run rich. Almost all O2s need a distance of at least 10 time the exhaust pipe diameter from the exhaust exit to prevent possible O2 level errors.
BTW, does it run rich when you have the cut-out open ?
If it doesn't then disregard the info below.
The reason I ask is that if the cutouts are closer then 30" to the O2 sensors it can cause the O2s to read a false lean condition and make it run rich. Almost all O2s need a distance of at least 10 time the exhaust pipe diameter from the exhaust exit to prevent possible O2 level errors.
10-13-2015, 04:06 PM
#6
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if you already have an electric cutout in place then just redo the back end to make it quite.
i wouldnt worry about the flow- why would it matter when you can open the cutout when you want to step on it.
as far as o2 sensor go. if were talking about the secondary one. do you still have a catalytic converter?
i wouldnt worry about the flow- why would it matter when you can open the cutout when you want to step on it.
as far as o2 sensor go. if were talking about the secondary one. do you still have a catalytic converter?
10-14-2015, 04:40 PM
#7
if you already have an electric cutout in place then just redo the back end to make it quite.
i wouldnt worry about the flow- why would it matter when you can open the cutout when you want to step on it.
as far as o2 sensor go. if were talking about the secondary one. do you still have a catalytic converter?
i wouldnt worry about the flow- why would it matter when you can open the cutout when you want to step on it.
as far as o2 sensor go. if were talking about the secondary one. do you still have a catalytic converter?
I want to get a CME and have it quiet as possible when cutouts are closed. I agree, what does flow matter through the catback? If I want flow, I just open the cutouts. So why not use a factory muffler with the CME and why put a cutout on the I pipe if I already have two cutouts inplace right after the longtubes?
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10-14-2015, 05:33 PM
#8
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oh ok. ya if they can confirm that its the right size then thats your best bet.
with electric cutout as long as the blades doesnt hit anything and correct size then your good.
being loud is subjective. if all you want is tone everything down then go with factory replacement. I wouldnt recomend buying a stock one because of age. if your going to replace it then replace with new ones. theres plenty of quiet ones out there since flow isnt a concern. with that said. have a friend drive the car with everything closed and see how you like it from the outside. ive had setup before that would drone inside and made things louder inside but outside its mild.
I personally like thrush super turbo muffler if you go that route. infact mine is setup just like the borla with an electric cutout where your "tune" it.
and yea you wouldnt need any cutout after the two.
as far as tune goes. since its sd i would assumed that they turn the rear o2 off since the conversion would need a tune and if its tuned its easy to turn it off.
with electric cutout as long as the blades doesnt hit anything and correct size then your good.
being loud is subjective. if all you want is tone everything down then go with factory replacement. I wouldnt recomend buying a stock one because of age. if your going to replace it then replace with new ones. theres plenty of quiet ones out there since flow isnt a concern. with that said. have a friend drive the car with everything closed and see how you like it from the outside. ive had setup before that would drone inside and made things louder inside but outside its mild.
I personally like thrush super turbo muffler if you go that route. infact mine is setup just like the borla with an electric cutout where your "tune" it.
and yea you wouldnt need any cutout after the two.
as far as tune goes. since its sd i would assumed that they turn the rear o2 off since the conversion would need a tune and if its tuned its easy to turn it off.
10-15-2015, 02:13 PM
#9
Stock replacement muffler is a WALKER 17670 Dynomax Super Turbo per rock auto for $70 plus shipping. I can get a whole stock catback and I-pipe for $120 used with low miles. I'm thinking maybe throw a Magnaflow 14419 in the stock I-pipe and dump it right off the stock muffler till I get a CME. This way, I can sell the borla and be quieter. The stock I-pipe that I'm looking at was cut by the owner to remove it. Would an additional 14419 in the I-pipe make it quieter?
10-15-2015, 09:13 PM
#10
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why not add a resonator in the I pipe? thats whats probably was on there anyways.
and superturbo muffler and quite in general. one should be fine and a resonator if you really want to. with eveything closed on mine its a really quite ride IMO.
and superturbo muffler and quite in general. one should be fine and a resonator if you really want to. with eveything closed on mine its a really quite ride IMO.