I think I want to go with gibson, whatever it is that I choose. I was wondering, which would be better for performance, a side exhaust or a dual rear exhaust?

 

Hi, jbob0124
While I was searching the message boards prior to installing my dual exhaust I did learn something that was very useful, If you are planning on trailering or carrying a camper / canopy with people / pets, the system should dump out the sides behind the rear tires. The exhaust gases are very toxic and could definitely be harmful to anyone that is exposed to them.
I love my exhaust system since I did the mod and it feels like I got
an increase in HP and Torque.

 

jbob0124,

I'm going out the sides for the same reason as above . . .

Bob

 

I saw a Dodge with a canopy on the freeway today...he had his duals going strait out the rear, I sure hope he isn't planning on hauling any kids in that thing.
I seriously think that there should be some sort of law about this sort of thing.
Some people just need to be protected from themselves(mostly Dodge owners Ha Ha).
I thought that strait out the rear would be the coolest part of the mod but thanks to the knowledge that is shared on these boards I got schooled in exhaust mods and that saved me a costly mistake, because I am planning on adding a camper real soon.

 

What are you talking about!

Number 1 If you have a canopy and are going down the freeway how is the exhaust going to get in the canopy? The ehaust goes out the back!

Number 2 If you are pulling a trailer it is against the law to have people in it while it is being pulled. Plus the exhaust will funnel under the trailer

Number 3 If it is a 5th wheel were it is legal to ride in while trailering how is the exhaust going to get in? It will be funneled under the fifth wheel.

Number 4 Most trailers are pretty well sealed so I doubt exhaust gasses are going to get in.

The only good reason that I have ever heard for not having straight back exhaust with a trailer is the fact that it can spray moisture from the pipes onto your trailer.

But nice try!

 

jdf150,
If you want to stick your duals strait out the rear and the open up your rear slider so you can get a whiff, then maybe you'd think twice about how to locate your duals. If you like what you smell then by all means breathe deep.
There is a vortex created by the aerodynamics of an object (Truck) traveling at high speeds in a forward fashion, Here's an experiment... try blowing some of that crap you're smoking into a closed room...now pass your hand thru the cloud of smoke,REAL fast. Did you see how the smoke kinda curled around your hand after it passed thru the cloud. the same thing would happen to an invisible cloud of toxic exhaust fumes. As for trailers...have fun cleaning the carbon deposits after your vacation.
When I replied to the original post I was intending to be helpful. I wanted to help a fellow F150er make an informed decision. Ever since I've been a member I have recieved very good advice from alot of other good folks in the message boards. The boards are a great place to get some honest feedback. When I first got here I was a new owner of a stock f250 looking for ways to improve my performance. I found some fairly economical solutions and along the way picked up some good advice. So maybe you could open your mind and keep your finger off the keyboard until you can add some value to this community. I bet I'm not the only one here that feels this way.

:o

 

Wow you are talking about passing laws to keep people from having exhaust straight out the back but so defensive when someone proves you don't know what you are talking about.
Maybe we should pass a law to keep you from hurting yourself!
You might want to get a few brain cells before you open your trap!

 

Just to give some validity to this conversation, My friend has an old school chevy silverado blazer ( I know chevy suck, i agree), but I was in the front seat and he had his back window rolled down on the freeway. Guess what I smelled, that's right exhaust and it was so strong, especially on a hot day, and yes going 65 mph, that we had to close the rear window ( he has flows out the back). Heat rises, but a law would be too much esp. if we don't want a trailor or campershell.( I know you were playin')
have a nice time rollin

see ya!

 

When I took my 92 Bronco to get duels put on, by the cheapest guy in town, he put them strait back. and YES I did smell fumes. Finally I took it to a person that had 40 years in. sure enough strait pipes where the problem. I had them turned and the problem went away. On my 98 I wanted to have side outs in front of the tire but discovered that the fule tank is in the way on the drivers side. So on my truck they are strait out the back but I do not haul 5th wheels or have a camper shell. :o

 

The concern about the rear exit exhst with the camper SHELL is posted on the mfgr's web site. It states:

SPLIT REAR SYSTEM • Highly poisonous carbon monoxide gas may be drawn into the rear compartment of Sport Utility vehicles, vans, or pickups with camper shells. Passengers and animals in the rear area run the risk of carbon monoxide poisoning. Additionally, the Split Rear Systems exhaust gases are directed at the tow trailer, and you may find exhaust soot on the towed trailer.
DUAL SPORT, SPLIT REAR and SUPER TRUCK • During heavy duty towing these systems produce a little louder sound in the cab
[ I will add the super truck is louder then a rear, but it really sounds cool other wise. <g >]

I did have a Gibson rear exit on my Dodge ( don't start with me..I now have a SCREW <g> ), but I did not use the rear slider, and I do not have people in the back of the truck ( cap with tools only ), so it was not an issue for me specifically.

jdf150....
Please look over this post :
https://www.f150online.com/forums/sh...threadid=79536

 

A long time ago, in a land far away (highschool), I was on a road trip with some buddies in a pickup with a canopy on it (stock exhaust, out the side, behind the tire). Needless to say, we were not drinking soda pop in the back.......

Long story short, "one" of us decided to take a pee out the back, well, it basically ended up all over the dude and inside the cap!! We were laughing too hard to care, but just proves that whatever is happening back there, the air is being drawn back towards the rear end.

I've also opened the rear door of a canopy while there was a travel trailer being towed (the things kids do...). The air was actually being drawn up and just hanging in the space between the cap and the trailer. (exhaust was out the side, behind the tire).

Just one more example........... In my old '86 5.0 GT (duals out the rear), I had a large box in the rear and the hatch was open some. Started to smell exhaust right away. I opened up the side windows to help the air flow inside and didn't have far to go, but proves to me that the exhaust exiting the rear can be drawn inside, if there is an opening.

Be safe out there......

 

Good point Mitch, I'll elaborate a little further. I was doing a construction job with a friend and using an Aerostar cargo van to dispose of the refuse.

After dumping all the crap in a dumpster we had the brilliant idea to leave the rear hatch up so all the remaining stuff would be blown out the back (saving us the chore of sweeping the van). To our surprise there was a dust storm bombarding us from the rear of the vehicle once we got over 35mph!

Oh well, you know what they say about good intentions .........

 

You guys are right, there is definately a vacuum created behind the vehicle which WILL SUCK the exhaust fumes right into the rear of the vehicle, furthermore the exhaust DOES NOT continue to flow ever so smoothly under a trailer!!!!!! WELL KNOWN FACT. If you plan on towing or a shell, go out the side.

 

I agree with you guys about the exhaust comming in from an open rear hatch or window, but here's a question for you...What happens if you are unfortunate enough (and definately a person with questionable taste) to own a Shovie Avalanche? With that midgate opened-up, wouldn't the gasses find their way into the cab?...along with dust and water? Or did GM magically find a way around this problem?

 

Umm... I have driven quite frequently with my rear slider open and never smelled any exhaust gases...

Now I agree with a shell that is another matter, but I think the vortex and dead spot behind the cab created in the bed would keep it from getting far enough forward to get in the rear slider.

Although I only use the rear slider in tandem with all of the other windows when it is warm out so there is always adequate ventilation in the cab... Hmmm...