North American Turbocoupe Organization



3" duals?
Shopteach Offline
Member
#1
I have a pair of 3" Dynomax turbo mufflers setting in the garage. I have a friend that can bend the pipe for the cost of the materials. My question is, is a 3" dual too much or should I stick with a 2 1/2" dual system? The car is stock so far, but I do intend to do modifications in the future.
'88 TC, '91 5.0 LX Convertible, '90 2.3 LX Coupe, '01 F250 4X4 Powerstroke Diesel, '46 Dodge WC, '47 Chevy 3100, '62 F600, '82 Harley-Davidson WideGlide
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Joe F Offline
Posting Freak
#2
No such thing as too much [Image: biggrin.gif]

The lower the backpressure the better with a turbocharger; I have read that it's difficult to get past eveything with 3" pipes, though. It was hard enough putting in my ATR 2-1/2" setup that was premade.

But free? Go for it! HTH.

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Joe F.

My 87 TC & mod list with sources
JR's Place - My '87 Turbocoupe
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Walsted Offline
Posting Freak
#3
Quote:Originally posted by Shopteach:
I have a pair of 3" Dynomax turbo mufflers setting in the garage. I have a friend that can bend the pipe for the cost of the materials...

Crush bend or mandrel bend?


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Mike Walsted - NATO member
1986 5-speed TurboCoupe and 1985 5-speed XR7
Mike Walsted - Sold my 1986 5-speed TurboCoupe
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martin0660 Offline
Posting Freak
#4
I've installed dual 2 1/2" systems, and a single 3" system on various cars over the years. I'm sure dual 3" can be done, but it is going to be REALLY tight on the passenger side.

If you look under the car, there is less room beside the gas tank on the passenger side. I suspect the pipe would need to come down further on that side. The drivers side can be nicely tucked in there, and looks okay from the outside.

Bob Myers
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Gary S Offline
Administrator
#5
Ditto on that right side for 3 inch. I am running 2 1/2 inch back and there was an interference point on the right side where they had to flatten the pipe some to get the necessary clearance.
Gary Schweikert

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NATO Member
1987 Turbocoupe
150,000 Miles
5 Speed
Black w/Raven Interior
Gillis Valve
3" Downpipe
Dynomax Super Turbo Mufflers w/2 1/2" exhaust
Centerforce I Clutch and Pressure Plate
Polished upper intake, lower intake, throttle body, front of turbo, water pump, tensioner pulleys, IAC, EGR, fuel rail. Chromed valve cover, top radiator cover, radiator brackets, alternator, air filter top, top of fan support, wheel centers, intercooler and bracket (all courtesy of Dan Eaves Polishing Services, Tuff Stuff Performance, and J&P Plating)
Soon To Come: Chromed Snowflakes
http://www.turbotbird.com//showroom/gs_87tc.htm

2003 Mustang'
1997 Toyota Camry
1993 Nissan 240SX
1993 Taurus SW
NATO Member
1987 Turbocoupe
168,000 Miles
5 Speed
Black w/Raven Interior
http://www.turbotbird.com/showroom/data_...t_87tc.php
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Shopteach Offline
Member
#6
Quote:Originally posted by Walsted:
Crush bend or mandrel bend?



I thought of that this morning after the post last night. I'm fairly certain it is a mandrel bend but don't know 100%.
'88 TC, '91 5.0 LX Convertible, '90 2.3 LX Coupe, '01 F250 4X4 Powerstroke Diesel, '46 Dodge WC, '47 Chevy 3100, '62 F600, '82 Harley-Davidson WideGlide
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turbocoupes Offline
Senior Member
#7
Within the last month I finished my exhaust...3" high flow cat to a 3" inside bullet with twin 2 1/2 outlets and ran the pipes in front of the rear wheels...no pics yet...camera died...the muffler is in the middle below the prop shaft and the pipes exit between the floor brace and the floor...tight fit with no rattles...

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Garry McVey Birdoprey always in flight... TBird TC owners are usually wingin' it
83 86 87 87 87 87 TC 87 XR4ti
Garry McVey "BIRDS OF A FEATHER" TBird TC owners are usually wingin' it
TC's 83 project, 86 donor for 83, 86 FUN street car daily driver with speed equipment from Red 88 donor, 87 blue to be stock street car, 87 red donor for blue and others, 87 red donor, 88 street and strip(now a donor) 14.01 chasin 13.0's, 87 XR4ti project,
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ThunderChickenTC Offline
Senior Member
#8
hey show me the pics when you get those, i was thinking of tryin that on my 88TC

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88 TC ....Custom window tint, American Racing 15" rims with Michelin x-radial tires, Custom system with custom built 2 and 1/2 sq. in. box. Next is Magnaflow exhaust mod!!!
88 TC ....Custom window tint, American Racing 15" rims with Michelin X-radial tires 215-70-r15, 9mm Ford Racing Spark-plug wires, K&N air filter, 3 core radiator, 180* Thermostat, Head completely rebuilt with an upgrade to a roller-cam, Silvannia Silverstar Bulbs for headlights, Painted wiper blades, XM Radio, Custom system with a custom built 5 cu. ft. box(2 and 1/2 cu. ft. per sub.), Custom Alarm System. Next is Magnaflow exhaust mod!!!
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Scott Evil Offline
Senior Member
#9
You are going to love the the pull with a 3" system.
1986 SVO 1D <19,000 miles
2001 Audi S4 Silver (the fastest color)
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deadbird Offline
Posting Freak
#10
what about a 3 inch system that splits to 3 inch duals. like the stock system only with 3'. i was thinking ethier using a single in dual out muffler. if i decide to go any muffler at all. i would get a high flow cat. ( no emisions test in MI) YAY!

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1988 TC Blue 5sp low miles no mods as of yet still gettin endumacated.
1987 5 sp.
- 4.6 2v swap.
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