Straight-pipe a 302?
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Postmaster
Joined: Jun 2004
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From: B/CS, Texas!!
Straight-pipe a 302?
I plan on doing some exhaust work on my 302. I want True Duals. At home, I have a lot of pipe that I can use. I want some single-chambered flowmasters as well.
If I run true-dual straight pipes, can it hurt the engine. The piping size is 2¼. I plan on adding the flowmasters later. I know it will be LOUD
, but does anyone have experience? Thanks 
If I run true-dual straight pipes, can it hurt the engine. The piping size is 2¼. I plan on adding the flowmasters later. I know it will be LOUD
, but does anyone have experience? Thanks
Post Fiend
Joined: Jan 2004
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From: Elkhart IN
well if the pip is to short, or has no restriction at all, the exhaust valves could cool to rapidly and cause them to crack, but alot of people have run straight pipes with out damage, its just the posiblity. i have cut everything off but the first cat, and i plan on gutting that this weekend, and runing out the side with a glasspack. i think you should be fine as long as your not just running headers and no pipe.
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From: Rio Rancho USA
Be sure you fill the inside with a piece of pipe. The large hollow hole left by the gutted cat will slow down exhaust flow.
chrono4- I have heard that story too. I have yet to see it actually happen, but I guess it could, in an extreme case.
chrono4- I have heard that story too. I have yet to see it actually happen, but I guess it could, in an extreme case.
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Postmaster
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From: B/CS, Texas!!
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Posting Guru
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From: Rio Rancho USA
Then, IMO, dont gut it. You will get more sound, sure, but exhaust flow will never be as good as it can be.
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From: Canastota
93GreenF150, I just wanted to ask you how big was the pipe the now departed-cat connected to? Was it the same as the tailpipe (mines 2 1/4) or was it 3in? It looks perty big to me but I figured you'd know!!
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Postmaster
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From: B/CS, Texas!!
Im pretty positive it's 3in.
Well, right now the glasspack just isn't cutting (soundwise) it. lol. I'm torching it off. Besides, I'm not really fond of that 'backrap' it does.
Hmmm...I'm still kinda thinking of true-dual straight pipe. Only thing getting in my way is that darn air injection tube down there. We'll see what happens
Well, right now the glasspack just isn't cutting (soundwise) it. lol. I'm torching it off. Besides, I'm not really fond of that 'backrap' it does.
Hmmm...I'm still kinda thinking of true-dual straight pipe. Only thing getting in my way is that darn air injection tube down there. We'll see what happens
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Postmaster
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From: B/CS, Texas!!
Ahhhh...glasspack is OFF! Back to that Sweet, SWEET sound!
Im gonna cut open that glasspack and take all the packing out, and re-install it. Later though, I just LOVE this sound right now!
Im gonna cut open that glasspack and take all the packing out, and re-install it. Later though, I just LOVE this sound right now!
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Postmaster
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From: B/CS, Texas!!
Well, spring break is here, but I have to work 
. BUT, that also means i'm home which I can get started on my straight pipe project . What I'm gonna do is, cut that first cat off. It's a Dual In so, that makes the job easier. I'm gonna run the pipes from there.
What's gonna get me is how to run the pipes over the frame rail. I need to get me some pre-bent pipe. After that, it's easy. I'm only gonna run the pipes to about where the middle U-joint is. After that, I'm gonna put some flowmasters. Then exit both pipes before the passenger rear tire. Alright.
. BUT, that also means i'm home which I can get started on my straight pipe project . What I'm gonna do is, cut that first cat off. It's a Dual In so, that makes the job easier. I'm gonna run the pipes from there.What's gonna get me is how to run the pipes over the frame rail. I need to get me some pre-bent pipe. After that, it's easy. I'm only gonna run the pipes to about where the middle U-joint is. After that, I'm gonna put some flowmasters. Then exit both pipes before the passenger rear tire. Alright.