Exhaust, in front of RR wheel

[RGT]

I am going to have to replace my exhaust soon, am thinking of going straight 4", though I may chicken out and put on a muffler,I am assuming most of the systems out there are from the down pipe back, are there larger down pipes available? My main question is whethor to dump the exhaust in front of the rear wheel, my only concern with this is might I be more likely to get exhaust in the in the cab running down the road with windows open, rear slider open ... . ?I am not a big ac fan even though the truck has it. (Not quite ready for stacks, Formula, though I do plan on putting a flatbed on at some point and will leave enough room between cab and bed for that option) I know I can run a muffler if I discharge behind the axle, with the CC I probably have enough room to run a conventional muffler and discharge in front of the wheel, or could run one of the type they run on bigger trucks..... any been there done that input would be appreciated

 

[WadePatton]

If you like soot-black wheels

Go ahead. Briar Hopper had his exhaust in front of the RR wheels at the Grand Opening. And you talk about some SOOT COVERED RUBBERS!



You can get a big downpipe -4"--just right for a HX-40. Most systems are end to end. The 5-inchers start as 4" and open up after the bend at the bottom of the firewall.

 

[Underdog]

At one time I considered running my exhaust out in front

of the wheel. I didn't want to run without a muffler so,I would

have had to make a sharp bend in the pipe in order to do

so. There is also the problem with soot down the side of

the truck. A chrome turn down helps a lot. Someone might

make a 4"" turbine down pipe for 1st. gens. but,I couldn't

find anyone. The fewer sharp bends,the better,imo.

 

[Mark_Kendrick]

My exhaust dumps in front of the tire. It has a nice newly vulcanized look all the time



It only takes one 5" 90* to turn in front of the tire. with a little luck you can build a 5" system for under $250 w/o downpipe.



I think a 3"-4" adapter a 4" 90* ans 2 4" 45* bends would make a downpipe using the old flange.



then use a 4"-5" to adapt to the exhaust.



Later,

Mark

 

[mopar2ya]

I have my pipe coming out by the RR and my wheel gets dirty,and its abit loud in the cab over a long trip. I will change this later.

 

[Mark_Kendrick]

I roll down the windows to hear the twins sing

 

[rwinslow]

I have had my exhaust ending in front of the rear axle since I bought the truck new in late 90. It has made quite a difference in mileage and performance over the years! Noise / fumes in the cab has not been an issue. . . . some soot on the axle housing, etc. I am looking at a 4" modification and I would definitely terminate before the axle housing.

 

[formula]

RGT, how'd ya know I was gonna suggest stacks? I don't know where you came up with that one



So, I also thought of doing the before the wheel pipe setup. I had one of those on my '88 W100 with 318 straight piped. It will be a lot louder in the cab than if you go out the back. The exhaust will come back into your windows a bit easier, but only when you're at a stop with the windows down and a light tailwind. Since you have a CC, you should have enough room for a tight radius 4" elbow to shoot out the side. Assuming the elbow(s) you use are mandrel bent, there won't be a problem with any restriction at the bends. (4" exhaust system is WAY big enough for our engines) The biggest downside to this setup is the soot on the wheel and as mentioned before, if you put on a nice fat turndown tip it will help. You can't use a downpipe for an HX40 on our turbos. The HX40 has a 4" outlet and we have a 3" outlet from the turbo. (of course, you could make one up if ya wanted to) As far as the muffler goes, put on one that's as huge as you want, no problem, if it'll fit. Just don't go for anything smaller or more restrictive than the stock muffer.



Sean

 

[C Schomer]

Mine's been there 2 yrs. I made the pipe stick about 2" out farther than the tire - absolutely no soot on wheel. The 21471 (?) 4"Walker was too loud to have the right window down until I stuffed the outer chamber with steel wool. Now it sounds very nice and tolerable. Craig

 

[Tim1]

rear exhaust

I used a mandral bent pipe from BD to go around the transfer case and dumped straight out in front of rear wheel. Big stainless tip and a little soot on tire if running hard. If pulling hard up hill in the mountains, the echo off the trees is really loud while the boost is high, however, when she flattens out the noise is quite nice. Would never go back! I have running boards, so the outlet of the exhaust sticks out about 1 1\2" past the board. I bought all the parts at napa, but i used 3" and a 5" tip. Tim

 

[bighammer]

It does make a mess of the rear wheel. A much simpler system though. No problems with fumes in the cab, except in the garage. (the whole garage fogs up) I tried straight out the back, but it would find its way into the cab on the road. Of course the air in the garage was better. There must be some kind of research behind that corner exit.