Another question about stacks
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Mountain Pass
Joined: Sep 2003
Posts: 224
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From: Pulaski, NY
Another question about stacks
I will be putting stacks on my truck this summer. I've read various other threads about stacks, but I haven't seen anything about running stacks and having a bed cap, which I will most likely install in the fall. Has anybody tried it? I've got a few ideas that will take care of water leaking through the cap - I'll draw something up and try to post it. The other concern I have is heat inside the cap - I'm up for suggestions on that one. I'm just kind of stuck because I want both! 
Posting Guru
Joined: Feb 2004
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From: Elverson, PA
Boy - you just want it all don't you!! 
I think if you are set on a cap - then you are gonna have to do some serious redneck engineering. 
My stacks get HOT - like really hot - like you don't wanna grab ahold of them right after you shut the truck off or anything. So I would imagine that the inside of your cap would be like an oven. Then you run into the problem of running the stacks through the top of the cap (which is what I assume you are talking about) and trying to seal something that gets flaming hot (stacks) to something that is not exactly heat resistant (cap). 
My first thought is pick one or the other - not both.... but that doesn't sound like you are up for that option!
I think if you are set on a cap - then you are gonna have to do some serious redneck engineering. My stacks get HOT - like really hot - like you don't wanna grab ahold of them right after you shut the truck off or anything. So I would imagine that the inside of your cap would be like an oven. Then you run into the problem of running the stacks through the top of the cap (which is what I assume you are talking about) and trying to seal something that gets flaming hot (stacks) to something that is not exactly heat resistant (cap). My first thought is pick one or the other - not both.... but that doesn't sound like you are up for that option!
Last edited by CAT_man_963; Feb 26, 2005 at 11:39 AM.
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Mountain Pass
Joined: Sep 2003
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From: Pulaski, NY
CatMan, here were my thoughts on how to build this setup: I figured I could use an 18 inch (or so) long, 6 inch stack, and weld a flange on it (somewhere in the middle, so that part of it passes through the cap), which I could then use as a mounting point to the cap. As for the actual exhaust, it would be a 4 inch pipe, and that would slip inside the 6 inch stack (which would essentially be for show). I would have to fab up some sort of spacer to center the 4 inch pipe inside the stack, then I was thinking about packing it with fiberglass or something to insulate the area around where the pipe passes through the cap. Inside the cap, I still haven't figured it all out, but would most likely build some sort of box around the pipe and insulate with fiberglass to keep the heat down. Still working it out in my head, and as you mentioned before, I am determined, but lucky for me I can still cope with reality: if it won't work, then it won't work, but I sure am gonna try...
Posting Guru
Joined: Feb 2004
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From: Elverson, PA
That is exactly the kind of thing I was thinking about for the top of the cap - great minds think alike. You could probably use a header wrap type stuff on all the piping in the cap to cut down on the heat, and not have it look like crap or take up too much space
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Mountain Pass
Joined: Sep 2003
Posts: 224
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From: Pulaski, NY
I really like the header wrap idea, I'll have to figure on doing that, and just try to build a decent looking transition between the stack and the exhaust pipe. I'll probably just build a box in the front of the bed where the Y-pipe is and have the stack butt up against the top of the box. Thanks Cat! 
Posting Guru
Joined: Feb 2004
Posts: 2,248
Likes: 1
From: Elverson, PA
Here's what I did for my stacks - you could use header wrap on the whole thing then...
https://www.ford-trucks.com/user_gal...=47264&width=2
https://www.ford-trucks.com/user_gal...=47263&width=2
good luck - sounds like you're almost all set to go!!
https://www.ford-trucks.com/user_gal...=47264&width=2
https://www.ford-trucks.com/user_gal...=47263&width=2
good luck - sounds like you're almost all set to go!!
