If you've installed or attempted to install true duals on your third gen fbod, I'd like to hear it.

Please, I've read countless reasons why it's a bad idea, I'd like to hear some real world attemps.

THANKS!!

------------------
1986 Black/Gold "GT" Z28
Original Owner, 202K+ near trouble free miles.
Mostly Stock, becoming less stock each day.

1995 Dark Red Metallic Corvette Coupe 36K miles

 

I'm planning an attempt...might be a couple weeks before I get around to it though..sorry

 

Joey
thats pretty low - having installed and posted pics of the ONLY dual exhaust installation I've seen on this board and have it called UNSUCCESSFUL (indirectly as it is) is kinda disheartening

I honestly hope you will do a better job - I look forward to seeing it!

 

Howdy there, I think I explained how my system worked one other time in the past, but I'll do it again for you all. First, I have Stan's custom made tri-Y headers, full length and they exit just short of the transmission crossmember. From their the exhaust pipes attach on either side of the driveshaft tunnel, running directly under the crossmember ( where they rattle ) and back to the rear axle. On the passenger side the pipes cross over the axle just as stock, on the driver side the pipe passes over the axle between the axle and upper panhard bar, where it's flattened out a little so it won't hit in big bumps like a speed bump. From their the exhaust crosses over to the opposite side of the car, through individual glasspacks for each pipe, to exit on the opposite side of the car. I can tell you it sounds great and dual 2 1/2" exhaust is probably great for the engine, but because of a myriad of clearance and rattle problems I'm changing over to a complete SLP system for my 350. Sorry I couldn't show a pic, but maybe this'll help in some way, shape, or form.

 

Kenn;

Sorry, I see how you could be offended, but, I've never seen a dual set up on this board, yours or otherwize. I put that statement there because of all the negatives I usually get.

Joey

 

Joey, scroll down on this board to the post titled "DUALS" and you'll see what Kenn is talking about. I have seen others than that on here though before it closed...although I don't think any were as clean as Kenn's. I'm very impressed.

 

Kenn, I checked the post, looks good.
Once again, Sorry.

 

Dude,
You DO NOT want to install duals under a 3rd gen. I did it on my car and thought that I would pick up a lot of power, the end result was a .5 slower ET and rattling all the damn time. I had more back pressure due to all of the bends than I did with a quality aftermarket mandrel bent exhaust. If you do attmept it, wait until you get to the rearend area. Have FUN!
Good luck,

 

Yeah you're right about the rear end area I relocated my rear brake line splitter to the left, modified my Panhard rod and remove the Panhard Rod bracket support rod thats on top (I will weld the Panhard Rod bracket to the frame GM only spot welded it) and since I lowered my car I get a bump on the drivers side pipe because of that Torque arm mounting structure on the diff- its a fixable pain

You know Joey I swapped in a 355 TPI LR, AFR 190 58cc, LPE 219/525 w/ 1.6rr, BBK52mm, TES and all - and ran a 13.8 - (was pissed!!!) decided on duals - bought a welder, Century 131 cordless - learned to use it - made a cross member -modified rear suspension- laid the pipe etc - all in all It has taken a solid year - but I did it , I like it , the car is faster- basically man I went through a lot a whole lot of trouble to do it and I hope it pays off at the track or I'll really be pissed - good luck with yours I'll post my times

 

i got true duals put on my car today if i can ever get picks or to a scanner i will post them somewhere

------------------
85z28
Chad Young
if you want to see my mods go herewww.geocities.com/sxt7camaross

 

you guys are making it way too difficult for yourselves...I have no bends in my dual exhaust...you just run the pipe under the rear axels...no rattling, straight through, incredible sound, H pipe and all...cost me $400 and it was worth every penny.

------------------
-'82 Z28 (350, carb'd, 4.10's, Super Comps, plenty of goodies)
-'91 S10 (nice daily driver)

AIM me at: Unitedhope
ICQ me at: 77979548

 

i have a way to run duels but not true. you buy either edelbrock TES headers for duel cats or the slp's. get 2 stock 2 1/2" intermidiet pipes and hang them paralell to eachother in the stock place in the tunnel. have a good muffler guy fab up two 2 1/2" pipes from the slp headers to the intermediet pipes. if you want to have the look of an emision system have him wels 2 dumby cats around the pipes. you can then have him bend two pipes from both intermediets and to some 9"race mufflers you deside the tips.

 

pics of 10 different methods

http://members.tripod.com/GRK_Taz/dualexaust.html

 

If you look closely you can see two Flowmaster 2 chambers hanging under there.

Heddman 1 5/8 full length to dual 3" pipes bent to follow the floor pan. The mufflers were mounted just in fron of the axle, and the turndowns exited directly below the axle. I ran this system for two years. I recently replaced it with a 4" mufflex single because, as you might imagine, I had some clearance problems. With the Hoosiers I was running in this pic, clearance was good, but with radials, I'd scrape on just about every bump.

 

I built a system on my 1988 Firebird
that has long headers and 2.5" true duals.
It is a welded setup, using 2.5" mandrel bends and straight sections. The crossmember
was notched (flanges flattened) so the pipes
pass under with maximum ground clearance.
The left pipe crosses over to the right behind the trans. Then both pipes follow the stock path back and over the axle. Two turbo
mufflers (14X4.5")are mounted behind the axle and the twin tail pipes exit out the back on the drivers side. This system ran the same ET
and 1/2 mph faster in the 1/4 then open exhaust and its quieter than most aftermarket
stuff. Even thou both pipes exit on the drivers side, it is "True Duals".

http://photos.yahoo.com/russ_q

[This message has been edited by F-BIRD'88 (edited October 24, 2001).]

[This message has been edited by F-BIRD'88 (edited October 25, 2001).]

 

You guys crack me up...

Here, take a look at this:
http://www.geocities.com/norine.geo/Exhaust.html

Now yes it was a bit expensive but remember his was fully polished stainless steel to win shows.

I plan on doing the same thing except without tail pipes. So it will look similar running off the headers and then the muffflers will be right in front of the axle with turn downs. Pretty simple.

 

Ya won't be cracked up when I smoke by ya!
and you get pinched by the man for makin' all
the noise..... and Mine didn't cost $3000..

Sorry, looks like a ground scraper to me.

[This message has been edited by F-BIRD'88 (edited October 25, 2001).]

[This message has been edited by F-BIRD'88 (edited October 25, 2001).]

 

check out spintech ?? they make oval tubing !! I've been looking for this stuff for awhile now !! makes a true dual possible .. and since no one can understand why anyone would want a true dual ... ever run a high volume (wide) oil pan ??? the front of the oil pan blocks the factory xover place ... so you have no choice but to run a pipe down the drivers side .. now you can buy tubing that is only 1.5 inches high ..BUT .. 4" wide

 

I posted this over a year ago. Glad it's revived!!

After too much time and money and much trial and error. I now have true duals on mine, with no more scraping than the original had.

Hindsight: I wished I'd gotten a 3" single cat back and been done with it.

------------------
1986 Black/Gold LG4 Z28
Original Owner, 200,000+ near trouble free miles.
Mostly Stock.

1995 Dark Red Metallic Corvette Coupe Original Owner

 

That sounds good and all, but you still have the mufflers to worry about, because they arent 1.5" thick.

 

not when they also make slimline mufflers that, as I recall are only like 2.5" thick

------------------
-'92 RS with self-installed '95 LT1
-Heddman Headers
-TPIS throttle body airfoil
-MSD 6-AL Ignition
Kills
-'97 Mustang Cobra
-'98 V6 Camaro
-'89 5.0 ****stang
-'97 Sebring
-'96 ****stang Cobra
-'95 Camaro Z28
-'88 Firebird
-'99 Ford Lightning

Losses
-'01 Mustang GT
-'99 Mustang GT
-'96 Mustang Cobra
-'95 Z28 (good race)
-'96(?) Turbo Eclipse (d*mn good race, heavily modified)

 

Hmmm....those mufflers sounds any good?

 

I did my own 3" dual exhaust and it works and sounds perfect. I used Hooker Super Comp headers and 2 chamber 3" Flowmasters w/ turndowns located just before the rear. I use the Southside Machine Lift Bars, with this system, and the bends had to go under the tranny crossmember, but up through the southside crossmember. I have plenty of ground clearance and like I said, it sounds wonderful. I am selling the whole system headers to turndowns for $350. It is on a 86 IROC. I am going w/ 2" primary headers and 4" exhaust. Building a 1200 horse s.b. and this exhaust just won't cut it. I have pics if interested in buying. Please, serious inquiries only. I am selling several other parts on the site under the classifieds section.
Thanks,
Tyler

------------------
Step up to the plate...and "GITCHASUMM!!!"

 

What tire are you running that you had plenty of clearance. I measured yesterday, and I would have 2 1/2 inches of clearance with those mufflers on my stock height 91 formula WS6 with 245/50-R16s.

I was planning to go over the rear axle with two 2 1/2" pipes in the stock pipe location. After a month of planning and finding out which methods wouldn't work, I don't care if it's true duals as long as it's duals. But, if you have found a way (without inverting the rear floor pans--I want to keep my back seat and there is no headroom if you invert the floor) to do it, post a pic, please.

[This message has been edited by cort351w (edited October 30, 2001).]

 

At the time I was running a 28" slick...or a 295/50/15 BFG. That tire is almost 26" tall.
How do I post a pic? I scanned them in so you all could see..but dunno how to put it up on here. Can email also

Thanks,

Tyler

------------------
Step up to the plate...and "GITCHASUMM!!!"

 

Dunno if this will work, but give it a try. Pics of the car and how the exhaust was done are on there. If you all have more questions, email me.

just copy and paste it into the browser

http://albums.photopoint.com/j/Album...newphotos=true

Thanks,

Tyler
TClarkRacn@aol.com

------------------
Step up to the plate...and "GITCHASUMM!!!"

 

it says that there are no pictures in the album. If you could email a picture to me, I'd appreciate it. cort351w@aol.com

I have a 91 formula WS6 so I got the 16x8 wheels. I am running 245/50-16, which should be somewhere around the same height as your tires. If it worked for you, it should work for me.

[This message has been edited by cort351w (edited October 30, 2001).]

 

read the directions ..you ned to input his e-mail adress which is listed in his sig
food for thought...
is true dual nessicary? there are plenty of fast 3rd and 4th gens running a single 3" exh system. when i had a 305 in my car i had true duals(2.25" sounded cool too, but had ****ty ground clearence with stock GTA wheels on it, ran good with only turns after the muffs , i had tail pipes added for emmisions testing and they effected my midrange power but gave me a meaner hole shot.
now i am back to single 3" however i had to use some of my old true setup since i have a 7QT pan i basicually Y'd the pipes togeter just after the tranny on the passenger side.
as a guide line i usually measure cost VS. gain will spending 400 on a true dual be more efficent than a single 3" for 230 bucks ...
my car pulled hard out of the hole, had enough power from a roll and pulled to 6500 with a single 3"
using past tense since i toasted my tranny
the next exh mod i'll do is copy my current y-pipe but with bigger pipe.
have fun and do whats going to make YOU enjoy your car.

------------------
87GTA ,10.5:1,4-bolt 355,afr 190's, super ram ,stock poerted base,58mmTB,24 lb FMS inj. ed wright chip, .510/230 (nr) 1&5/8 hooker shorty's, flow master single 3", 2800 ameri-torque non lk-up, 3.73. best to date with stk 48mm tb and lack of traction in 1st gear netted me a 12.9 @110mph /91 TA daily driver LB9 A4 2.73

 

Well I would have to say that my dual setup is successful since I've had it for 3yrs. or so and I highly recommend it over the single just for the sound itself. But remember it's what you like.

------------------
<<Ths Stang Stomper>>

 

And what is your setup?

 

Dual 3" with flowmasters.



------------------
<<Ths Stang Stomper>>

 

I just put dual headers on my 84 last weekend. Took about 10 hours. Headman headers, umm...2in i think..have to look at the paperwork, used flex pipe from the reducers to the mufflers (glasspacks), and dual exhaust tips. The only scrape I get is on the driver's side, cause the pipe hangs a little low due to we ran out of hangers. Going to fix it next week sometime. Not really a priority, since I have to fix the gas fumes coming into the cabin problem before I can drive it anymore.

p.s. Used flex pipe 'cause it came with the car, along with the glasspack, headers, etc. My father in law had bought the stuff before he gave me the car.

 

ack

------------------
-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options

 

I am having the rear floor pans cut and flipped. I am not running a rear seat anyway. The only reason I am doing this is because the car has a monster of a motor and will see only limited street use. Plus, it will run 3.5 inch pipe on each side.

The points about why to run duals are valid. The y-pipe setup can be a pain to do smoothly and if you run a deep oil pan, you are SOL.

Personally, I feel a single 3" or 4" is plently on a street car, but some of these other factors may limit your choices.

Mark

 

I have true duals. Hedman shorty headers to 2 1/2 inch pipe to glasspacks and it dumps right behind the back seat. I did have to raise the front of the car an inch and the back 3 inches in order to keep my clearance the same.

Andrew

 

Do you have the pics of your car raised? Does it look like a 4X4?

 

hell no it doesnt look like a 4x4. it just makes it slant towards the front a little more and gives it a more aggressive stance.

Andrew