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Old 04-29-2013, 12:46 PM   #1
Bad Noodle
Scooby Specialist
 
Member#: 174442
Join Date: Mar 2008
Chapter/Region: Tri-State
Location: NNJ
Vehicle:
2007 SuperWagon
I don't spell well

Default should I wrap my crappy home made up-pipe?

I've been researching and see arguments on both sides so I'm throwing it out there.

What it is:
- vibrant 16ga tubing
- precision vbands
- mild steel 1/2" thick intake flange to mate with stock header (could only find it in mild steel, so it is what it is)

Concerns:
- Cracking at flanges or welds
- Keeping heat off the TMIC

Ideally I'd like to wrap it to keep the heat soak to a minimum, but not sure if 16 ga ss piping that is welded to a mild steel flange with a home depot Lincoln Electric Mig can take it.

So it comes down to why headers/flanges crack? Is it a bad weld job, sub-par materials, too thin tubing, too much heat wrap? I can't find a clear answer so I'm asking.
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Old 04-29-2013, 01:37 PM   #2
HeroCrank
Scooby Specialist
 
Member#: 301089
Join Date: Nov 2011
Chapter/Region: NESIC
Location: MAINE
Vehicle:
2011 WRX 5 door
TP stage 2

Default

On a downpipe, thermal wrap in my experience takes average temperature on the pipe and evenly distributes it along the entire pipe. Meaning taking the hottest temp closest to the turbo and taking the temp farthest down the downpipe and taking the average of the two.(See infrared testing volume 2.) that's not probably mathmatically accurate but its the best way I can think of explaining the affects of thermal wrap.

I personally have no infrared information on the heat ranges that the up pipe will be exposed to, but I have an idea that it will be higher and be more consistant being so short and in between the two biggest thermal loads. If your welds suck as you were saying than it will probably break anyway from being heat cycled over time. To properly wrap the up pipe your going to have to remove it anyway so you may want to look into a proper aftermarket unit.

If you are still going to use your homemade pipe you might as well wrap it. It will slightly decrease the overall temp and it won't require very much. If your tmic is your biggest concern like you stated, a downpipe blanket and a turbo blanket should be the items you want the most.
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