87 Ls 3.8L V6 dual exhaust

Topic: 87 Ls 3.8L V6 dual exhaust (Read 2983 times) previous topic - next topic

87 Ls 3.8L V6 dual exhaust

April 05, 2005, 05:29:53 PM

im thinking about putting a dual exhaust on my cat in the summer when i get more cash, because the 3.8 needs some juice. does anyone have any idea how much it would cost to put this in, or if anyone would even do it?

Re: 87 Ls 3.8L V6 dual exhaust

Reply #1 – April 05, 2005, 05:33:37 PM

If I had a v-6, that would be one of my first mods. I would just call up a couple of exhaust shops. I got quoted $250, until they figured out that it was a 86. So I am just going to tell them that it is an 87 and I am not sure about the year. the v-6 should benifit as much, or maybe even more then a 5.0 would. I would plan on alittle more like maybe $100 for the v-6 headers. Check out the v6 duel exhaust link on the cool cats site in the tech section.

Re: 87 Ls 3.8L V6 dual exhaust

Reply #2 – April 05, 2005, 05:33:45 PM

it depends on how far you want to go

easiest route is to use the y-pipe and dual ler setup from an 88 XR7

hard route is to have duals custom made, use 2.25" pipe, cats, and something like super turbo lers

harder route, use 3.8 stang headers, possibly a custom h-pipe, and a catback from a stang, which will require some tweaking

depends on what you really want

Re: 87 Ls 3.8L V6 dual exhaust

Reply #3 – April 05, 2005, 07:04:11 PM

The stock dual exhaust from 88's is definatly the cheapest way to go. I got all the pipes, hangers, and clamps for a little less than $150. I think the 2 1/4" pipes would probably be a little overkill for the 3.8 if you are doing dual exhaust. If you go with a fairly free flowing ler and 2 1/4" pipes it might not have enough back pressure to run right and you could end up losing power.

Re: 87 Ls 3.8L V6 dual exhaust

Reply #4 – April 05, 2005, 07:11:39 PM

I paid $400 for the exhaust for my 3.8 bird. That included new exhaust manifold studs, taking a 5.0 H and making it fit the 3.8, Dyno Max Turbo lers and tail pipes that exited behind the tires.

Sounds like a lot of money but the entire system was welded also, and all custom bent.

Re: 87 Ls 3.8L V6 dual exhaust

Reply #5 – April 05, 2005, 08:06:24 PM

2.25 isnt too much, seeing as the stock manifolds are restrictive as hell, and standard cats and superturbo's provide decent backpressure

hell, the V6 stang guys run 2.25 all the way back with the headers, the love it up

Re: 87 Ls 3.8L V6 dual exhaust

Reply #6 – April 05, 2005, 08:16:51 PM

Oh I see. Thank you for showing me the error in my ways. :D

Re: 87 Ls 3.8L V6 dual exhaust

Reply #7 – April 05, 2005, 08:31:07 PM

any time :)

Re: 87 Ls 3.8L V6 dual exhaust

Reply #8 – April 07, 2005, 12:54:29 PM

i was talking to my manager at work, and after looking at my engine he told me i had throttle body injection, and it would be a waste of money to get a dual exhaust because i wouldent even tell the difference. does this sound right? (i have an 87 cougar LS with a 3.8L V6)

Re: 87 Ls 3.8L V6 dual exhaust

Reply #9 – April 07, 2005, 04:03:58 PM

well, its properly called CFI which means Central Fuel Injection, but yes...its TBI

no matter what you do, youll feel a gain with the dual exhaust, the exhaust is horribly restrictive on these cars, but horribly restrictive...i mean...like breathing through a drinking straw while doing the mile run

Re: 87 Ls 3.8L V6 dual exhaust

Reply #10 – April 07, 2005, 04:56:18 PM

My old 87 V6 with CFI woke up when I put a 2.25 inch custom dual exhaust on it. I kept the stock exhaust manifolds too. It had a nice set of *ahem* glasspacks on it and it was one loud mother. Would love to seen what it would've sounded like with some headers.

Re: 87 Ls 3.8L V6 dual exhaust

Reply #11 – April 07, 2005, 05:17:49 PM

how much power would actually be gained? isnt it basically minimal, like maybe 5 or 10 tops. I was gonna do this one my 5.0 by the end of the week, hopefully for alittle better gas miliage.

Re: 87 Ls 3.8L V6 dual exhaust

Reply #12 – April 07, 2005, 06:26:48 PM

Quote

how much power would actually be gained

Depends on what you wanna do....You won't get much more out of a stock cougar/tbird dual setup but it will deffinetely be an improvement. On both my cougars I went custom and I was extremely happy with the results. I absolutely felt the difference in both cars and I would have to say to feel it would mean it resulted in more than 5 HP.

Re: 87 Ls 3.8L V6 dual exhaust

Reply #13 – April 07, 2005, 07:34:16 PM

Maybe consider a custom single 2.5" system if duals prove too much work.

Re: 87 Ls 3.8L V6 dual exhaust

Reply #14 – April 07, 2005, 09:44:33 PM

I'm just a car-guy n00b but if I remember what I read correctly, in order to install dual's you also need a double-hump cross member underneath the tranny. I don't know what an '87 came with but thats' what has been inhibiting me since I got my car, an '88 ls.