exaust questions
Tuned
Joined: Apr 2003
Posts: 351
Likes: 1
From: Davis County, UT
Dual looks and sound great. But keep in mind: What are you using the truck for? Cruising, Towing, Racing?
A nice big single exhuast is best for towing, you will have more useable low end torque. Duals are great if you are racing and running in the higher RPM ranges where you need the air flow. Just food for thought!
My old Ford I used to run in high school, was a cruizer, street drag machine. It had a 390 and I had 2.5" duals, with an X-Pipe and Glass Packs. Loud as hell, could never hear the radio. The occasional times I would tow, I had to be in low gears and keep the revs up to climb the steep grades.
A nice big single exhuast is best for towing, you will have more useable low end torque. Duals are great if you are racing and running in the higher RPM ranges where you need the air flow. Just food for thought!
My old Ford I used to run in high school, was a cruizer, street drag machine. It had a 390 and I had 2.5" duals, with an X-Pipe and Glass Packs. Loud as hell, could never hear the radio. The occasional times I would tow, I had to be in low gears and keep the revs up to climb the steep grades.
Junior User
Joined: Jul 2009
Posts: 53
Likes: 0
I was thinking about headers too but then i found out i couldnt pull in the truck pulls because u need stock manifolds. so i just gutted out my first resignator cat and took of my 2nd cat. it loud when u get on it but it can get quiet lol
Senior User
Joined: Jun 2009
Posts: 130
Likes: 1
From: Sylvan Lake, Alberta, Can
I just put dual cherry bomb turbo's on my ole girl to quite it down some from the shorty headers into nothing but straight pipe that come out just in front of the passenger back wheel, it used to be a screamer but now it has a nice rumble that doesnt get gross when you stand on it at all. i am glad i made the change.
Tuned
Joined: Mar 2009
Posts: 373
Likes: 0
From: Ohio
dual with an x pipe or single isnt really the question. it's pipe diameter. the thing you're really trying to do is maximize exhaust gas velocity, so a decently sized single pipe(3") or a dual 2" with an x pipe should have about the same effect. Wantas post was accurate as well, smaller/single pipe setups are gonna have higher exhaust velocity in the lower rpm ranges than larger/dual pipe setups, but once the rpms get up there it will switch.
Fleet Mechanic
Joined: Jun 2007
Posts: 1,931
Likes: 2
From: Ohio
dont go 2 into one, its making all cylinders push exhale into one tube basically, get nice equal length headers, 2.5" to 3" piping and whatever muffler you choose super 44's sound good and belive me, when i say they sound goo they do, i drove a 79 f150 with a 460 that had super 44s and it WAS noticable
Posting Guru
Joined: Feb 2007
Posts: 1,006
Likes: 2
dont go 2 into one, its making all cylinders push exhale into one tube basically, get nice equal length headers, 2.5" to 3" piping and whatever muffler you choose super 44's sound good and belive me, when i say they sound goo they do, i drove a 79 f150 with a 460 that had super 44s and it WAS noticable
Hotshot
Joined: Sep 2001
Posts: 11,958
Likes: 228
True duals are not necessary on a stock engine. I good free flowing single is good enough. You can get a single in dual out muffler if you want the look of duals. Thats what I did on my truck. If my truck had a built up engine it would probably have true duals.
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Senior User
Joined: Sep 2008
Posts: 419
Likes: 0
From: Alfred NY and Long Island
I just did some exhaust on my truck, I still have to pass emissions here in NY, so I just cut everything off after the cat, and ran 3 inch cat back, comes out of the cat, splits, and comes out on a 45 after the rear tires, when you are just crusing, its got a decent rumble but it isnt loud and no real cab noise, but as soon as I get on it, shes a screamer... I was happy with it, and only cost me the pipe, no mufflers to just rust away anyway
Posting Guru
Joined: Dec 2006
Posts: 1,639
Likes: 2
Senior User
Joined: Jan 2008
Posts: 126
Likes: 0
From: HAMPTON
the federal law say you can not change the exhaust from the converter forward that over rides all states.unless it was built before 1972. i go thew this ni my shop all the time it just depends on looks at it and if they realy care.
Tuned
Joined: Mar 2009
Posts: 373
Likes: 0
From: Ohio
I read the true duals thing on a mustang forum. i'd look for the post but it might take a while. basically they said that each pipe will have an uneven amount of backpressure because of the firing order and that and x pipe would help to equalize it and maximize performance. Granted they are probably talking about competitive racing setups, not daily driven trucks
Postmaster
Joined: Jan 2009
Posts: 4,558
Likes: 2
In other words you don't know anything about it but what you read, yes a h or x pipe , if put in the right place will help performance, i would like to know why true duals suck because of the firing order,,,When you make a statement like that i want to here what you have to back it up,,, You can teach me somthing,,,, & mustangs are daily drivers just like trucks ... Lew