Exhaust system info

[Tittle Diesel Performance]

On 8/30/2018 at 9:26 PM, Mopar1973Man said:

 

In all that said... 90% of the people here set their cruise control for 65, 75, or 85 MPH and not think about it. The daily driver there is next to zero gain to be had with exhaust or intakes for a daily driver. Yeah, if you jumped on a dyno or raced quarter mile now these little tidbits will add up to little off your quarter mile time or just a few extra HP/TQ in the curve. Still, in all majority of the people on this website drive their truck to and from work and haul trailers up and down the highway. I've learned long ago not to bite the hype of performance this or performance that because those number only applied to someone that was WOT all the time. Now the daily driver whole different story and different factual numbers come from them.

 

Your correct on yes that was tested at wide open but part throttle conditions still apply. You won't see as much peak at part throttle cruise, in fact three inch pipe is still more then enough. CAI intakes won't make that big of a difference no but any air flow modification even at part throttle on these non restricted engines does matter. For example the tunnel ram style intake from crazy Carl's, that does help cylinder to cylinder distribution as well as volumetric efficacy regardless of fuel injected since the dynamic compression in increased do to more air mass or valume. Dual horn intakes do the same thing. Increases in air flow do matter but CAI's don't do anything unless your pulling a vacuum pre-turbo. Engines are air pumps, it's all about volumetric efficacy. There is some hype to it mostly because of people who don't understand and of course marketing but there are changes made. That said if you do any upgrades give a tunnel ram a try. The grid heater delete plates make a touch of change but not much. With the tunnel ram I wouldn't run one to keep the air swirl in the boost tube moving so there would be better distribution. But that's just me lol

[NIsaacs]

On ‎8‎/‎25‎/‎2018 at 4:16 PM, Tittle Diesel Performance said:

 I love the deep grunt and burp sound, it just screams cummins! Cheap 4" systems will gain you the same power but it's a little more raspy.

 

Now the MOST IMPORTANT part! The material!!!! This makes a huge difference in sound, no performance gains but the sound change is amazing. 

 

 

Sound is also dependent on single or dual. There is a big difference in sound with a single exhaust on a 1st and 2nd gen. v/s the 3rd and 4th gens. Mostly it is because of the center outlet exhaust manifold v/s the split manifold.

 

My '74 F-350 5.9 Cummins with a center outlet exhaust manifold and duals sounds very similar to a split exhaust manifold of the 3-4 gens. Especially if you use a divided y-pipe, like this:

 

https://www.youtube.com/watch?v=hy8NaAjxP34  Quick video of my Ford exhaust sound.    

[Tittle Diesel Performance]

Absolutely along with the fact that stacks are usually stainless and of course angles make a big difference. With duals you also have length and bend in differences that effect sound too. 

 

In a high school project a friend and I took a chevy long bed half ton truck, routed the exhaust up into the bed and with a bunch of straight and U sections we made the most idiotic exhaust ever, it spaneded front to back of the bed 11 times on both sides (true dual) and essentially filled the entire bed with exhaust to prove a point on sound waves. No mufflers or cats and it dropped 35db of sound due to all the bends and various angles we used.  Flow wasn't the greatest but the point of the science project was we wanted to weld and goof off but the therory was dampening noise without a common exhaust muffler or cat system. Got an A on it and it cracked like an AK47 lol

[int3man]

Well I have a different type of exhaust question.  Just purchased a used 01 and the exhaust dumps right after the muffler, or resonator.  In front of the rear axle.  I can't imagine that this is good for the Right rear Brake assembly?  Is this stock?  Or is there a piece that is supposed to good over the Rear axle?  It's a 4" exhaust by the way.

 

Thanks

Michael

Edited September 4, 2018 by int3man

[Mopar1973Man]

It suppose to dump out rear of the passenger side rear tire. 

[int3man]

So someone got lazy.  Does anyone know where I can buy the over the axle part and dump portion for a 4" exhaust?  I need to get it out of the Right Rear Axle area.

 

Thanks!

Michael.

[JAG1]

54 minutes ago, int3man said:

Well I have a different type of exhaust question.  Just purchased a used 01 and the exhaust dumps right after the muffler, or resonator.  In front of the rear axle.  I can't imagine that this is good for the Right rear Brake assembly?  Is this stock?  Or is there a piece that is supposed to good for the Rear axle?  It's a 4" exhaust by the way.

 

Thanks

Michael

Mine is that way also simply cause it rotted off just behind the stock muffler so I removed the tail section so it wasn't flopping around. I'm going to jamb a steel rod up the muffler to open that little piece of metal inside and make more of a flow thru muffler. Then jamb in a tight fitting piece of pipe inside the muffler and then reweld the tail section back on to clean pipe. 

21 minutes ago, int3man said:

So someone got lazy.  Does anyone know where I can buy the over the axle part and dump portion for a 4" exhaust?  I need to get it out of the Right Rear Axle area.

 

Thanks!

Michael.

Call or go online to Diamond Eye Exhaust. They have those tail sections pre bent in their kits. 

[dripley]

14 minutes ago, JAG1 said:

Mine is that way also simply cause it rotted off just behind the stock muffler so I removed the tail section so it wasn't flopping around. I'm going to jamb a steel rod up the muffler to open that little piece of metal inside and make more of a flow thru muffler. Then jamb in a tight fitting piece of pipe inside the muffler and then reweld the tail section back on to clean pipe. 

 

I always knew you had some redneck in ya. Just did not know how much.

 Steel rod thru the muffler=poor mans magna flow.

[Mopar1973Man]

Might be easier to just replace the entire exhaust with a new kit. Unknown if you can get the right tail section for length and everything without seeing the existing system and what you've got.

[JAG1]

It called ram rod mufflers.

[JAG1]

2 hours ago, Mopar1973Man said:

Might be easier to just replace the entire exhaust with a new kit. Unknown if you can get the right tail section for length and everything without seeing the existing system and what you've got.

It rotted at the back end of the muffler is all. So I'm sleeving a new piece to go up inside the muffler long enough to allow cutting off the rot on the tail section which is still pretty good. Then weld it up. Doing it after work when i am already dirty in the evening.

 

[JAG1]

16 hours ago, int3man said:

So someone got lazy.  Does anyone know where I can buy the over the axle part and dump portion for a 4" exhaust?  I need to get it out of the Right Rear Axle area.

 

Thanks!

Michael.

IBMobile has one. His stock exhaust is still all in good shape just laying there since he wanted a new System.

 

You might be close enough from where he is to go pick it up. Not sure

Edited September 4, 2018 by JAG1

[Tittle Diesel Performance]

On 9/3/2018 at 4:44 PM, int3man said:

Well I have a different type of exhaust question.  Just purchased a used 01 and the exhaust dumps right after the muffler, or resonator.  In front of the rear axle.  I can't imagine that this is good for the Right rear Brake assembly?  Is this stock?  Or is there a piece that is supposed to good over the Rear axle?  It's a 4" exhaust by the way.

 

Thanks

Michael

Yeah not stock that's called a lazy install. It's not great being the brake line is on the axle tube and the heat pulling can boil the brake fluid prematurely. Best to pipe it out the side or atleast put a turn down that exits below the axle housing but not lower then the lowest point of the drum. Or better yet go for a full system behind the tire like mopar man said. 

If your got a rotted exhaust it's hard to beat a $250 4" alluminized exhaust. It's better then potential CO2 and CO poisoning if you've also got a sweet ventilated factory floor and cab corners