oem exhaust February 07, 2007, 11:29:16 PM I searched several different sites and cant find the answer.What diameter downpipe does my 86TC have? Is the rest of the exhaust the same size diameter?With a 3in downpipe splitting to duals, 2.25in diameter mandrel bent pipes are all thats needed, anything larger is overkill.I want to keep my tailpipes tucked up under the body like the 88TCs. Do I have to buy oem type tailpipes from a place like Napa, or can I shorten the hangers on a 87-93 Mustang system to make them sit higher? Quote Selected
oem exhaust Reply #1 – February 08, 2007, 10:34:12 AM Stock downpipe is 2.5". And no.I have dual 2.5" tailpipes coming out the back, I bought those because they were readily available mandrel bent (mustang tailpipes). There's no such thing as overkill in the exhaust behind a turbo.As far as tucking the tailpipes...well, if you buy mustang tailpipes you have to lengthen them anyway. Get LX-style pipes and just put a turndown on the end of the pipe. Also, you can tuck bigger pipes up a LITTLE bit but you start hitting stuff. If you really want them to tuck up like stock tailpipes you'd probably have to have some made for you. Quote Selected
oem exhaust Reply #2 – February 08, 2007, 11:23:19 AM The DP on the 83-86 TCs is 2-1/4". The 87-88 TCs have the 2-1/2" DP. Quote Selected
oem exhaust Reply #3 – February 08, 2007, 11:43:57 AM Quote from: Red_LX;128262 There's no such thing as overkill in the exhaust behind a turbo.Sure there is.Area of a circle = 3.14 x R x R.A 2.5 in downpipe has an area of 4.9 in, a dual 2 in system has an area of 6.28 in.A 3.0 in downpipe has an area of 7.1 in, a dual 2.25 system has an area of 7.9 in.A larger than needed exhaust system will add unwanted weight, cause fitment issues, and cost more money. Quote Selected
oem exhaust Reply #4 – February 08, 2007, 12:00:14 PM Well you obviously have everything all figured out. What do you need us for?If you're worried about weight/cost/fitment, then why even futz with a dual exhaust, esp on a car that came with a single one to begin with? You just neutered your own argument right there. Run a single 3".The more free-flowing the exhaust the better with a turbocharged engine. Is a 3.5 or 4" system overkill? Perhaps, unless you're running a Holset or some other large turbo. But it's only "overkill" in the sense that you are paying more for little gain over a 3" system, which is plenty for most of these cars (2.3T). Quote Selected
oem exhaust Reply #5 – February 08, 2007, 12:24:54 PM Quote from: TucanSam;128271Sure there is.Area of a circle = 3.14 x R x R.A 2.5 in downpipe has an area of 4.9 in, a dual 2 in system has an area of 6.28 in.A 3.0 in downpipe has an area of 7.1 in, a dual 2.25 system has an area of 7.9 in.A larger than needed exhaust system will add unwanted weight, cause fitment issues, and cost more money.You're right, sorry I tried to help :rolleyes:Better stick with that 2.5" downpipe and 2" exhaust, wouldn't want all that extra weight slowing you down! Quote Selected
oem exhaust Reply #6 – February 08, 2007, 01:32:36 PM You guys have pissy attitudes, after a week here I see that if I have an idea or disagree with you, then your right and Im wrong.Ive been in this hobby over 30 years, I think I know alittle bit about it.I can go somewhere else. Quote Selected
oem exhaust Reply #7 – February 08, 2007, 01:41:15 PM Christ, can your skin be any more thin?Obviously you want everyone to just nod their heads and agree with you. I haven't been in the hobby for over 30 years, but I'm not an idiot. Quote Selected
oem exhaust Reply #8 – February 08, 2007, 02:10:37 PM I know a little bit about it too. I gave you answers to your questions and you tell me they're wrong? And then you say I have a pissy attitude.Don't ask questions, then feel the need to disprove the answers people give you. You might find nobody wanting to help you out anymore. Quote Selected
oem exhaust Reply #10 – February 08, 2007, 04:43:12 PM No, I asked you boys what the oem exhaust system consisted of.I disagree that bigger is better and pointed out my reasoning. If you dont agree with me, fine.To get all pissy and say I shouldnt ask T-Bird specific questions, shows me that you are know-it-alls interested in promoting yourselves.I can find the information I want elsewhere without there having to be alot of Drama involved.Thank you Quote Selected
oem exhaust Reply #11 – February 08, 2007, 07:35:25 PM Quote from: TucanSam;128325No, I asked you boys what the oem exhaust system consisted of.No. You asked what size the stock downpipe was and then asked about tailpipes, and I told you.As far as your "bigger is not better" theory, you apparently know nothing about turbos.I encourage you to go elsewhere, because YOU are the one acting like a knowitall. Quote Selected
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