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Old 03-25-2005, 01:07 AM   #1
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gt exhaust on v6

are there any modifications you have to do to put on the gt exhaust from the cat back if so what do you have to do and is it worth it to someone who doesnt have much money but wants a little better flow and look
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Old 03-25-2005, 01:11 AM   #2
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Just buy the gt takes offs and take them to a local muffler shop and they will put them on for you. You shouldnt have to do anything but pay them
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Old 03-25-2005, 11:59 AM   #3
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Quote:
Originally Posted by Brent
Just buy the gt takes offs and take them to a local muffler shop and they will put them on for you. You shouldnt have to do anything but pay them
Ditto, just tell them to cut your exhaust behind the cats, weld the take off's up, and be done with it. Install should be no more than 150, probably should be closer to 100.
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Old 03-25-2005, 01:00 PM   #4
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should be no more than $100.
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Old 03-25-2005, 05:44 PM   #5
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Quote:
Originally Posted by WhiteStang99
should be no more than $100.
Depends on whre you are. My quote was 120, but squeezed away for 100 installed because he took 2 hours longer than he said he would because his friend showed up and wasted my time in waiting.
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Old 03-25-2005, 06:26 PM   #6
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you can buy an adaptor to let you simply bolt the gt cat back on, the adaptor must be welded in and removes the stock Y pipe, this is the best way to go since you can remove the cat back when you need to for what ever reason, else you will have to hack up the cat back or get a custom fabed exhaust.

FYI: dont buy chrome tips or tips larger than 3 inches.
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Old 03-25-2005, 07:40 PM   #7
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Quote:
Originally Posted by SpectorV

FYI: dont buy chrome tips or tips larger than 3 inches.
I agree with not buying chrome tips...but my 3 inch tips look small to me. Prolly gonna change them out to 3 1/2. They're rolled edge, which makes them look smaller.
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Old 03-25-2005, 07:43 PM   #8
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any more than 3 is to much but thats just my opinion
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Old 03-25-2005, 08:06 PM   #9
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the Borla exhaust that i put on today has 4" rolled edge tips and i think they look awesome, bigger the better. but i think over 4" is pushin it a little to big.
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Old 03-25-2005, 09:21 PM   #10
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You got the Stinger kit, right?

I've seen it on a kid's GT that lives here....Looks pretty badass, sounds amazing too
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Old 03-25-2005, 09:40 PM   #11
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ya, i got the stinger kit and an x-pipe, put it all on today. it looks amazin and sounds freakin awesome. when you get around 2000 rpm, it gets really loud, my whole interior vibrates just about. its got such a nice rap to it and i can feel a pretty big difference, well worth and im lovin it
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Old 03-25-2005, 10:56 PM   #12
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If I ever get a GT, the order for one of those kits will be in the day I get the car
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Old 03-26-2005, 10:36 AM   #13
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its so nice, you'll want to drive your car for hours if you do. ya i would get that system, i think its worth it.
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Old 03-26-2005, 11:06 PM   #14
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Exhaust adapter

I agree with Spector V

Actually, I'm ordering all pieces to convert my stock exhaust for GT Takeoffs, as you want to do; the guy at the muffler shop wich is not the boss (he also owns a V6 Mustang) recommended me to take the Steeda or Pacesetter V6 exhaust adapter. According to him I will get a very good "fit" for a cheaper price than a custom made (for equivalent quality)...

Naturally, I promised him not repeating that to his boss...

He's asking me 75.00$ CAN. money (labor + OEM hangers). I supply the Takeoffs + the adapter.
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Old 03-26-2005, 11:31 PM   #15
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I bought the pacestter adapter

Not Impressed

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Holy crap he's right.
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Old 03-26-2005, 11:34 PM   #16
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I just have true duals, and welded it all back up. If I wanna pull it off, I'll just use a sawzall
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Old 03-27-2005, 06:04 PM   #17
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I'd avoid huge tips if they are expanding the overall pipe size to that.
You need to maintain the overall size until the end. Big Pipe slows the
velocity, and we do not need that!
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Old 03-27-2005, 06:11 PM   #18
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Quote:
Originally Posted by RGR
I'd avoid huge tips if they are expanding the overall pipe size to that.
You need to maintain the overall size until the end. Big Pipe slows the
velocity, and we do not need that!
Yeh...i'm not wanting 3 1/2 inch piping all the way through the exhaust. Just 3 1/2 inch tips, about 20 inches long. I know that 3 1/2 piping won't give enough if any backpressure, therefore the engine will lose power.
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Old 03-28-2005, 06:38 AM   #19
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TIPS are usually OK, and deepen the sound in some cases,
but I like to see consistent sizing until the very end. (tips)
I think what Spec and the boys are saying is you want to
avoid looking like you have fart cans, those generic ricers
spoil everything for the serious cars with their silliness.

I'm making a distinction between the serious import hot rodders
and the boy-racer-boy-ricer crowd, just so everyone knows!

I respect SERIOUS hot rodders no matter what the brand!
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Old 03-28-2005, 06:48 AM   #20
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Quote:
Originally Posted by RGR
I'd avoid huge tips if they are expanding the overall pipe size to that.
You need to maintain the overall size until the end. Big Pipe slows the
velocity, and we do not need that!
One problem with that theory. If it were true then the pipe size would need to decrease as you moved farther away from the engine. As the exhaust gasses cool they contract and to maintain velocity you'l downsize the pipe. Something no one does or recommends. Hmm, maybe a new design I can market to the rice crowd.

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Old 03-28-2005, 06:50 AM   #21
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Quote:
Originally Posted by lowflyn
I know that 3 1/2 piping won't give enough if any backpressure, therefore the engine will lose power.



Unless you are running a turbo backpressure loses HP, period. The reason too big pipes lose power is loss of velocity, not loss of backpressure.

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Old 03-28-2005, 07:44 AM   #22
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Quote:
Originally Posted by Ponycarman
One problem with that theory. If it were true then the pipe size would need to decrease as you moved farther away from the engine. As the exhaust gasses cool they contract and to maintain velocity you'l downsize the pipe. Something no one does or recommends. Hmm, maybe a new design I can market to the rice crowd.

Steve

That is actually the "converse" of the theory I stated above. A converse is
a logical conclusion drawn from a fact or hypothesis that needs explored and
verified. You made the proper jump in logic (as many have) but if it were
stated thus:

"Conversely, the pipe size would need to decrease as you moved farther away from the engine. As the exhaust gasses cool they contract and to maintain velocity you'll downsize the pipe."

But as you also said, "Something no one does or recommends." Because
in this cas, the converse DOES NOT hold true! But that does not invalidate
the original statement.

Exhaust Heat Retention is practiced widely, (not as widely as it chould be)
this maintains velocity and allows consistently sized pipe to be used. Note
the increasing popularity of coated exhaust components, as an example.

Good Eye Steve!!!
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Old 03-28-2005, 09:14 AM   #23
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Quote:
Originally Posted by Ponycarman


Unless you are running a turbo backpressure loses HP, period. The reason too big pipes lose power is loss of velocity, not loss of backpressure.

Steve
Hey now...I have 2 1/4 piping true duals..I was just clarifying for other ppl's sake..
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Old 03-28-2005, 10:17 PM   #24
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Quote:
Originally Posted by Ponycarman


Unless you are running a turbo backpressure loses HP, period. The reason too big pipes lose power is loss of velocity, not loss of backpressure.

Steve
backpressure doesn't lose HP. too much backpressure is what loses hp. the main thing with too big of pipes on a n/a car is loss of tq. on a boosted car you can run a lot bigger pipes, no cat and straight thru muffler because of the much greater volume of gasses. I'm very involved in the DSM scene and with the 2.0L DOHC 16V turbo 4G63 motor everyone puts 3 in pipes all the way back with straight thru mufflers (most with no cats) and create soo much more power. if you tryed to do that on a 3.8 it would run like **** without some heavy modding and boost.
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Old 03-29-2005, 06:51 AM   #25
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Quote:
Originally Posted by dr10129
Backpressure doesn't lose HP. too much backpressure is what loses hp. The main thing with too big of pipes on an n/a car is loss of tq. on a boosted car you can run a lot bigger pipes, no cat and straight thru muffler because of the much greater volume of gasses. I'm very involved in the DSM scene and with the 2.0L DOHC 16V turbo 4G63 motor everyone puts 3 in pipes all the way back with straight thru mufflers (most with no cats) and create so much more power. if you tried to do that on a 3.8 it would run like **** without some heavy modding and boost.
You were doing well until the statements I highlighted, actually 3" pipe
shared between both banks is just about right for even a STOCK V6.
Now I agree, 3" dual is waaaaay overkill and would cause some problems.

3" single flows less than 2.25" duals, which is what most stock to NA-built
V6's run these days.
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Old 03-29-2005, 10:06 AM   #26
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Quote:
Originally Posted by dr10129
backpressure doesn't lose HP. too much backpressure is what loses hp. the main thing with too big of pipes on a n/a car is loss of tq. on a boosted car you can run a lot bigger pipes, no cat and straight thru muffler because of the much greater volume of gasses. I'm very involved in the DSM scene and with the 2.0L DOHC 16V turbo 4G63 motor everyone puts 3 in pipes all the way back with straight thru mufflers (most with no cats) and create soo much more power. if you tryed to do that on a 3.8 it would run like **** without some heavy modding and boost.
You aren't thinking about what I said. We are talking about the backpressure the engine sees, not the turbo.

If there was no back pressure at the engine the turbo wouldn't work.

Again I'l reiterate, backpressure loses HP, period. What loses torque in an N/A engine is loss of velocity, which is not the same thing as backpressure. Backpresure is simply defined as not being able to flow enough for the amount of gasses involved, hence that exhaust gasses starts to pressurize. That means you have a flow restriction and unless that restriction is something that adds power, like a turbo, then it is loosing you power.

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Old 03-29-2005, 11:17 AM   #27
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Actually you are both right... just looking at it differently.


EXCESSIVE backpressure loses HP in the higher RPM's
or at whatever point it becomes excessive. In a turbo
setup lower backpressure @ peak boost will increase
boost at the same RPM. I'm speaking of changes in backpressure.
Turbos use the pressure differential between the cylinder and
atmospheric to spin the impeller. Less "backpressure" is the same
as a higher differential, and more boost is produced.
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Old 03-29-2005, 11:20 AM   #28
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BTW, not just for ponycarman, lots of people do this, but it is

losing not "loosing"

Loosing is like releasing a dog from it's chain...

Losing is like less HP due to excessive backpressure or insufficient flow.
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Old 03-29-2005, 11:47 AM   #29
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this guy is getting more than he bargained for haha.
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