2 1/2"exhaust on tbird - TCCoA Forums
 
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post #1 of 10 (permalink) Old 08-13-2006, 02:38 PM Thread Starter
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2 1/2"exhaust on tbird

anybody on here think that 2 1/2 " true duals would be too much for a stock 4.6 (94) that is going to be modded later (either PI heads, cams and intake or explorer swap). I was thinking 2 1/4, but if i can get ahold of some 2 1/2 pipe i would like to run it now, and only have to build the exhaust once.

jamie

Jamie
'96 Thunderbird LX 4.6L
'07 Eddie Bauer Explorer 4.6L 3v
'06 Mustang GT 4.6L 3v 5 spd




"10 in the tank, 4 on the floor"
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post #2 of 10 (permalink) Old 08-13-2006, 03:07 PM
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Are you going to be getting up to around or over 300hp? That is the suggested pipe size for that power rating.

~Chuck

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post #3 of 10 (permalink) Old 08-13-2006, 03:36 PM Thread Starter
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that is the plan. not sure when it is going to happen though. would 2 1/2 be too much and kill my low end torque until i got to that range?

Jamie
'96 Thunderbird LX 4.6L
'07 Eddie Bauer Explorer 4.6L 3v
'06 Mustang GT 4.6L 3v 5 spd




"10 in the tank, 4 on the floor"
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post #4 of 10 (permalink) Old 08-13-2006, 06:08 PM
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No.....2 1/2" is just perfect for your car, especially with future mods. For the ever so little you might loose in off idle torque, your horsepower and torque curve will gain it 10-fold as the RPM climbs.

~Brian~


*1990 Mustang Coupe, 5.4L*
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post #5 of 10 (permalink) Old 08-13-2006, 06:30 PM Thread Starter
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cool, that is what i was hoping for. guess i get to start measuring and gettting ready to cut and weld.

jamie

Jamie
'96 Thunderbird LX 4.6L
'07 Eddie Bauer Explorer 4.6L 3v
'06 Mustang GT 4.6L 3v 5 spd




"10 in the tank, 4 on the floor"
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post #6 of 10 (permalink) Old 08-13-2006, 10:09 PM
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Are you going to run cats? Is your 94 completely stock right now? The loss of lowend will be very noticeable unless you are running a higher Stall TC.
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post #7 of 10 (permalink) Old 08-13-2006, 10:36 PM Thread Starter
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completely stock right now. i am planning on leaving the front cats on and getting rid of the third one (some say its a cat, some say resonator )

Jamie
'96 Thunderbird LX 4.6L
'07 Eddie Bauer Explorer 4.6L 3v
'06 Mustang GT 4.6L 3v 5 spd




"10 in the tank, 4 on the floor"
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post #8 of 10 (permalink) Old 08-13-2006, 10:45 PM
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You won't notice any loss than as the front 2 cats are the biggest restriction in the stock exhaust. When you do all your other mods, you may want to address that and either go with high flow 2.5" cats or ditch them all together.
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post #9 of 10 (permalink) Old 08-13-2006, 11:19 PM
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Im planning a 2 1/4 exhaust for my bird. My PI motor is out of my bird now for a rebuild and i will be making a little over 300 HP when it goes back in.

Jim

1995 Thunderbird LX: Vortech S-Trim(12psi), Forged PI 4.6, T-45, SCT Tune, Eibach Pro-kit, Magnaflow DI/DO Exhaust, 3.73 TL, and 17" Cobras

1995 Thunderbird SC: Bone Stock
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post #10 of 10 (permalink) Old 08-13-2006, 11:32 PM Thread Starter
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yeah, when i start modding it i am going to look into ditching the cats, i just have to make sure i wont have to do any emmisions(i only need to for the base, not for california since i am registered in illinois)

Jamie
'96 Thunderbird LX 4.6L
'07 Eddie Bauer Explorer 4.6L 3v
'06 Mustang GT 4.6L 3v 5 spd




"10 in the tank, 4 on the floor"
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