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flex-piping for Charge pipe?

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Old 10-29-2013, 08:41 AM
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Default flex-piping for Charge pipe?

Is it safe to use some of that "flex bendable exhaust" that you can buy from oreillys or autozone for a section of cold piping? Im working with very little space so I might have to resort to it. 75% of my charge piping is 2.5" 12 gauge mild steel ran along the rocker panel.
My truck is slammed also so "aint nobody got time for aluminum" lol
Old 10-29-2013, 08:55 AM
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Try it and see. As long as it doesn't blow off . My first turbo build I used pvc piping . haha Sloppy
Old 10-29-2013, 11:10 AM
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FYI... The grey PVC (electrical) is more rigid, but can be custom curved/shaped with a $9 Harbor Freight heat gun if you go slow. Pretty durable too.
Old 10-29-2013, 11:42 AM
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Originally Posted by HRHohio
FYI... The grey PVC (electrical) is more rigid, but can be custom curved/shaped with a $9 Harbor Freight heat gun if you go slow. Pretty durable too.
yeah that's what I used. worked good for awhile. It did start distorting though. That's when I started learning how to tig weld haha!. But it was a good learning experience.
Old 10-29-2013, 12:23 PM
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Yeah, it will distort a little over time if it's not supported every few feet, but the material is so light it can be supported with zip ties almost. lol Okay, that may be a stretch. haha It's also good for mocking up your setup. AND IT'S CHEAP!

I used this for charge pipe once (Super rigid stuff):
http://www.lowes.com/pd_23953-1814-A...7C1&facetInfo=

Worked great! You have to heat the bends slow, or else you get a little wrinkle. I painted it and everyone was shocked to hear what it was afterwards. Looked like mild steel after painted (hammertone), lol. No leaks either! Great stuff.
Old 10-29-2013, 12:28 PM
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I like these kind of threads.
Old 10-29-2013, 01:13 PM
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Yea there's gonna be some guys on here that will be upset about us talking about putting pvc for a cold side. Haha!. I like it though.
Old 10-29-2013, 01:15 PM
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Originally Posted by Ron_Stoppable
Is it safe to use some of that "flex bendable exhaust" that you can buy from oreillys or autozone for a section of cold piping?
Only if you are using it on a honda...
Old 10-29-2013, 01:37 PM
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I really have no other alternative... I plan on using this section of mild steel recessed under the rocker panel. If the exhaust guy can can get about a 90* degree bend OVER the rear frame (underneath the bed) to the compressor housing ill do that. But as you can see I really have NO room. The only other rational plan of attack is cutting out some of the floor where the kick panel is... for the rear I plan on mounting it like the last pic , see how the charge pipe swings over the frame right near the first leaf spring bolt
Old 10-29-2013, 01:40 PM
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Originally Posted by Twin turbo c5
Yea there's gonna be some guys on here that will be upset about us talking about putting pvc for a cold side. Haha!. I like it though.
Hahaha... Yeah, I know... but if it works. I've been on denmah's threads too much! I'm a convert! lol. I can't go back.
Old 10-29-2013, 06:51 PM
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Flex piping wont affect boost will it
Old 10-29-2013, 07:21 PM
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depends what type you are talking about. The type like this....




Will leak under pressure.
Old 10-29-2013, 07:29 PM
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I know the exact 3" flex pipe your talking about. Its plastic and I tried it... drove down the road and got into boost. BOOM! it ******* exploded. was fun to laugh at though haha
Old 10-29-2013, 07:32 PM
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That sucks! PVC is good to 120-300 psi, depending on what you get. But keep it away from any exhaust. I had my section go from my intercooler to TB. Held fine.

Gotta do whatcha gotta dooooo...
Old 10-29-2013, 07:40 PM
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Old 10-29-2013, 08:47 PM
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Hahaha... Damn... sorry for laughing. Hey, you tried, right? lol

So that bursts under pressure, apparently... and the metal one leaks under pressure...

Looks like either custom bent mild steel, or PVC, OR a combination of the 2. Maybe run PVC from the turbo to the part where it needs to angle up into the engine compartment, connect with a silicone connector, straight metal pipe past the headers (Wrapped with header wrap of course, otherwise you're heating your charge pipe), then finish with PVC in areas not so heat sensitive.
Old 10-29-2013, 09:07 PM
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good god.. PVC turbo kit..
Old 10-29-2013, 09:19 PM
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Originally Posted by HRHohio
Hahaha... Damn... sorry for laughing. Hey, you tried, right? lol

So that bursts under pressure, apparently... and the metal one leaks under pressure...

Looks like either custom bent mild steel, or PVC, OR a combination of the 2. Maybe run PVC from the turbo to the part where it needs to angle up into the engine compartment, connect with a silicone connector, straight metal pipe past the headers (Wrapped with header wrap of course, otherwise you're heating your charge pipe), then finish with PVC in areas not so heat sensitive.
don't worry I laughed at it too haha
Old 10-30-2013, 12:31 AM
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Yup thats exactly what is was talking about lol. Dangit!! Gues im gonna try to squeeze 2.5" piping behind my 18s. Im too concerned with minor rubbing.
Old 10-30-2013, 07:37 AM
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Use 2" piping...


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