352 Exhaust....???
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Posting Guru
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From: Massachusetts
352 Exhaust....???
My 65 F-350 352 is in need of dual exhaust so she can breath better...
I know guys have said to build your engine or exhaust to the way you will use your truck. I plan on doing a lot of heavy towing with my truck. so what kind of exhaust do i need to get for my 352? Guys have said headers will only give you torque at over 4,000 RPMS...? What exhaust is gonna give me more torque starting off at a stop sign towing a loaded trailer??? I'm looking for lots of torque at Low RPMS to help me tow, are headers gonna help me at all?
I know guys have said to build your engine or exhaust to the way you will use your truck. I plan on doing a lot of heavy towing with my truck. so what kind of exhaust do i need to get for my 352? Guys have said headers will only give you torque at over 4,000 RPMS...? What exhaust is gonna give me more torque starting off at a stop sign towing a loaded trailer??? I'm looking for lots of torque at Low RPMS to help me tow, are headers gonna help me at all?
Postmaster
Joined: Nov 2001
Posts: 3,351
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From: Escondido, CA
Well I would check the source of their information. Headers work from idle all the way to your redline. A header improves the flow of the exhaust gases as they come out of the exhaust ports. In comparison, a stock manifold has a smaller port and combines all of them after two 90 degree bends within the first 5 inches or so. The less bends you have in the exhaust the better. Will the truck be louder? Yes, that is because all the energy is coming out with the gases vise bouncing off all the turns them coming out. A set of street headers are all you need. No sense in buying fenderwell exit headers or race headers. There is a huge debate between long and short headers as well. Most of the time the debate stems from misinformation and theories, not testing. Equal length headers are better but again why spend the extra cash if all you want is imoroved flow for more TQ. It also depends on the cam shaft, head port design, and so on if you want to get down to it. Just a set of plain jane headers and new mufflers will add enough to feel a diffence.
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Post Fiend
Joined: Dec 2003
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From: "Islander"
Originally Posted by airharley
Well I would check the source of their information. Equal length headers are better
Standard production headers are not equal length, this allows for a wider torque rpm zone on the street vs equal length headers allowing for maximum hp and torque in a narrow rpm range under race conditions.
After headers don't let a muffler shop install a large crazy pipe exhaust system, 2 /4" min to 2 1/2" max with a X crossover or H as a second choice. Add a set of free flowing mufflers without a lot of noise and drone, you should be good to go. I would check timing advance curve as well fuel air ratio to see if it can be improved.
Postmaster
Joined: Nov 2001
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From: Escondido, CA
Beemer I was pointing out different headers that are out there. The equal length were listed as being better in reguards to how they perform, not a recommendation to go pick up a pair. Sorry if I left that as vage as I did. I sometimes get ahead of how fast I can type. 
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
BOBud, There is and has been a lot of discussion on headers. I have them on my truck currently, and don't think I would ever do it again. They are loud, they are hot, and they are known to kill starters with the heat. That in itself can change a 15 minute job into hours because you have to remove the right side to get it out.
There is no argument that the passenger side log manifold is lacking flow. Installing two driver side 360 manifolds could be one way to resolve that issue.
My engine is turning 2050 at 55mph and at 4000 all the numbers on the speedo have been used. While headers work from idle the benefit of them isn't realized below 4000 rpms. IMHO
Everybody ought to own one set in his life. No more long tubes for me.
John
There is no argument that the passenger side log manifold is lacking flow. Installing two driver side 360 manifolds could be one way to resolve that issue.
My engine is turning 2050 at 55mph and at 4000 all the numbers on the speedo have been used. While headers work from idle the benefit of them isn't realized below 4000 rpms. IMHO
Everybody ought to own one set in his life. No more long tubes for me.
John
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From: Massachusetts
Thank you guys for your input, i think im gonna go with headers, i just don't to be disappointed if i don't get some more torque, you know? Other than that, more flow the better! I'll search some mroe on the forums to see what typ e of header will be best for me, thanks a bunch guys!
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Elder User
Joined: May 2005
Posts: 581
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From: Montana
after readin the posts i have a coupla questions. Do the (short) headers still get in the way of starter repair.??? anyone that has driven these trucks for as long as i have knows that the FE starters leave a lot to be desired. anyway. second question. has anyone installed the driver side manifold on the passenger side? and do you have to put in upside down,??/ i was always under the impression that the design an the passenger side had to be that way to clear the firewall. this is a new concept to me and i'm really curious. Dutch
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
Dutch, The head bolt pattern is the same for both heads. This is a photo of a right side log manifold. http://home.alltel.net/bsprowl/Exhau...austRight.html
The is is a drivers side
http://home.alltel.net/bsprowl/Exhau...haustLeft.html
Putting a drivers side on the passenger would require a little more bending but IMHO is a viable option.
John
The is is a drivers side
http://home.alltel.net/bsprowl/Exhau...haustLeft.html
Putting a drivers side on the passenger would require a little more bending but IMHO is a viable option.
John
Lead Driver
Joined: Oct 2004
Posts: 8,062
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From: Central Oregon
I have been running the same headers on my 66 for over 20years, I would not go back to the stock manifolds. My truck is a 4x4 so the starter burn out is not a problem. I also run a 390ci engine.
Lead Driver
Joined: Oct 2004
Posts: 8,062
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From: Central Oregon
Originally Posted by Beemer Nut
custom; can I ask how can ya break a FE crank?
Post Fiend
Joined: Dec 2003
Posts: 6,658
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From: "Islander"
As my dad said years ago,"can I have the real truth this time?".
"make up a new story, i've heard all the other ones".
He also told me once when I was driving, "you know that red mark on the tach isn't there as a decoration".
"make up a new story, i've heard all the other ones".
He also told me once when I was driving, "you know that red mark on the tach isn't there as a decoration".
Elder User
Joined: Feb 2004
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From: San Luis Obispo, CA
My 2 cents worth: On a 390 (or 352) going from single to dual exhaust is a big step. I am not so sure that headers are that much more help. I towed a 7,000-pound tandem-axle trailer across the USA over a dozen trips and found that my 390 did fine. (One trip was with a CAT D-2 on the trailer giving me over 12,000 GCVW and I got an honest 9.3 mpg at 50-55 mph. That is every drop of gas for the trip, including fill-up at the end, divided into the total mileage.)
Now if you want to tow at 75 mph, those tubing headers will help you do it, but I guarantee you will burn exhaust valves unless you get a 391 with sodium-cooled exhaust valves. (I do not try to keep up with the diesel guys when towing.)
Alternatives to the right-side stock manifold are a good idea. I have a Mustang cast iron set -- if you are interested, I'll post a picture in my gallery.
I also did research a few years ago and would recommend "tri-Y" style headers for towing/torque applications.
Archie
Now if you want to tow at 75 mph, those tubing headers will help you do it, but I guarantee you will burn exhaust valves unless you get a 391 with sodium-cooled exhaust valves. (I do not try to keep up with the diesel guys when towing.)
Alternatives to the right-side stock manifold are a good idea. I have a Mustang cast iron set -- if you are interested, I'll post a picture in my gallery.
I also did research a few years ago and would recommend "tri-Y" style headers for towing/torque applications.
Archie
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
Originally Posted by bertha66
I have been running the same headers on my 66 for over 20years, I would not go back to the stock manifolds. My truck is a 4x4 so the starter burn out is not a problem. I also run a 390ci engine.
thanks
John