Want stacks, but what to do?

[Forddieselphile]

I have been pondering for some time now on the type of exhaust im gonna put in my rig, I decided of course had to go with stacks, but I wanted some insight on just going with straight pipe duals or with the box set up ive seen on some of you guys rigs, what are the pros and cons between the two and is the box just for resonation and better sound?

[super_stroke]

the square tube is alot cheaper to build with. if you have a welder and basic fab skills you could probably build one in a day. the pre-made kit is what i got. it took about two hour's to do it, i think. but if this one ever rust's out i'll build another one from square tube.

[Forddieselphile]

Right on man,
So, you have peaked my interest. What kind of tube did you use to make them,... mild steel, stainless, etc....? And furthermore, how did you pipe the exhaust up from the bottom of the truck? One more thing, do you know of any performance benefits in comparison between the two? (straight pipe vs. box) Oh and by the way, that smoke outta your stacks is absolutely beautiful!!

---

Last edited by Forddieselphile : 07-09-2006 at 07:07 PM.

[ndurbin]

Some guys think the y-pipe trucks sound better than the square box kits. I haven't heard one of each in person to know for myself.

[Forddieselphile]

How much more on average do they cost, if you happen to know?

[Maintain]

Most guys have a single tube that comes up out of the bed and then split into 2 stacks. Here are some pictures of stacks that I took while at the Dillsburg Pa Dyno event -->
here and here

There has been some controversy over this issue of performance in the Stacks vs the Straight Pipe. Some say that since there are sharp turns in the Stacked setup that it creates more backpressure then a regular straight pipe. However stacked trucks look BADDASS and people that don't own/know about diesels don't understand.

I would say the difference is negligible

[super_stroke]

the kit i got was made by grand rock (one of our sponsors) but i got it from black cloud diesel. it came with every thing i needed Y pipe and elbow. i had to buy the reducer to go from 4" to 5". bought that at a muffler shop. the kit is made from galvanized steel. if i build mine it'll be out of plain mild steel. >>>link to stack kit<<<

[Maintain]

Furthermore, some say that having the straight cut stacks can lead to backpressure issues because rain can fall in them and collect near the bottom most parts of the tubing.

Some recommend that you need to get the turned stacks so that it keeps the rain out, otherwise put a cap on the top of the straight ones like you see on dump trucks. The two pictures in my above post illustrates the two styles well imo. LOL I saw an old body style dodge (92ish) with stacks and caps and it looked horrible, then again I didn't even see the "cummins turbo diesel" symbol on the door lol.

[Forddieselphile]

Thanks Maintain, I guess I can easily see a small performance drop with the sharp angles involved in a stack set up. And yes, stacked trucks look extremely
BAD beepbeepbeep! I really like the looks of the Y-Tube set up on those Dodges, but Im sure they are extremely expensive, correct? And was that a plastic bag melted on the silver tucks exhaust?

[Forddieselphile]

Thanks for the links both you guys , Im gonna try to get mine done here within the next month or so, so be lookin for pics!! And cheers to the both of you!