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01-26-2013, 02:48 PM | #1 |
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at what point is it a waste of time to add more heat wrap?
2 layers, 3, 4?
at the moment i've wrapped each pipe individually (EL headers) and then wrapped the whole lot as one with an extra layer. worth bothering with any more?
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01-26-2013, 04:18 PM | #2 |
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The question I would ask is, "Why are you wrapping it?" Are you trying to keep heat in the pipes (to feed a turbo), or trying to keep it from heating up something else near the pipes?
Back in the day I wrapped my stainless steel header pipes just once and could briefly touch the pipe without getting burned. 'Twas sufficient. |
01-26-2013, 07:00 PM | #3 |
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right now
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01-26-2013, 07:02 PM | #4 |
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I have always gone with 1/2 overlap using 2 inch wide heat wrap. This gives a double layer of wrap which IMO is plenty. Any more I think is just extra weight. The copper and the titanium wraps are very effective.
My goals are twofold, on the turbo, header, and uppipe it's more to keep the heat in the pipe and out of the engine compartment, on the DP it was only to keep the heat out of the engine compartment. |
01-27-2013, 12:28 AM | #5 |
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i should clarify guys, i'm trying to reduce underhood temperatures.
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02-02-2013, 10:20 AM | #6 |
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Every layer of insulation you add helps to slow the rate of heat transfer but its not a linear relationship to the number of layers you add. There is a point of diminishing returns of what the wrap can do. If you put 80 layers on your header I'm sure you could put your bare balls on your headers after a run but is all that really necessary.
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02-02-2013, 11:23 AM | #7 |
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I think you are asking a really intriguing question! I'd like to know the answer!
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02-02-2013, 11:45 AM | #8 |
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Also, make damn sure that and slip joints, etc. Are secured very well. Header wrap will hold heat into the stainless piping, making it maliable and bendable.
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02-02-2013, 11:49 AM | #9 | ||
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Quote:
Quote:
can you elaborate for me mate? |
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02-02-2013, 12:07 PM | #10 |
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02-02-2013, 12:12 PM | #11 |
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02-02-2013, 12:33 PM | #12 |
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I see cracked headers and plenty other cracks in ur future.
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02-02-2013, 01:19 PM | #13 |
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Not to be an ass but if you don't know what you want how are we to know what you want. If all your looking for is someone to tell you two wraps is fine then two wraps are fine. Its better than no wraps and less effective than infinite wraps. That is the honest to god best info you will probably find on the subject.
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02-02-2013, 03:12 PM | #14 | |
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Quote:
You can see the slip joint on the right (driver's side) in the pic of the header on Perrin Performance's website... http://www.perrinperformance.com/sub...r-equal-length Last edited by skimobile; 02-02-2013 at 04:06 PM. |
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02-02-2013, 08:30 PM | #15 |
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keep wrapping until you run out of money
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02-02-2013, 10:03 PM | #16 | |
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Quote:
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02-02-2013, 10:10 PM | #17 | ||
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Quote:
Quote:
aha. i see! single piece headers so not an issue. |
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02-02-2013, 10:38 PM | #18 |
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1 1/2in wrap will do well, just make sure you wrap it all the way and as tight as you can. You can touch my headers for a second or so without getting burned. I've also noticed that the wrap has reduced engine bay heat drastically ..
You can pick up 50ft of 1 1/2in heat wrap on ebay for $50 in black or white- On another note, You can pick up aluminum radiator fans/housings fairly cheap on ebay that might do you some good if you want to swap out the burnt/melted plastic fans your running... Last edited by white guys wrx; 02-02-2013 at 10:45 PM. |
02-03-2013, 05:53 AM | #19 |
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I believe the DEI (wrap manufacturer) recommends to wrap in overlapping layers with 1/4" overlap on the wrap.
http://www.designengineering.com/downloads/installs White Guys WRX, thanks ...I've already switched to Invidia 1 piece header and up-pipe combo and Mishimoto aluminum radiator shroud/fan. |
02-03-2013, 03:19 PM | #20 | |
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Quote:
Yes, 1/4th is correct. It is very hard to measure out how much you are wrapping however when doing this, so I said wrap it tight. I think the invidia 1 piece will work out a lot better for you. Be sure to check around your oil cooler also to make sure nothing is melted... ALSO, I would for sure send an email to the manufacture of the header that melted your parts to see if there is any type of reimbursement. That sure does sound and look like manufacture defect |
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02-04-2013, 01:20 AM | #21 |
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08-24-2013, 12:48 AM | #22 |
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Has anyone recorded intake temperatures before and after wrapping?
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08-24-2013, 08:15 AM | #23 |
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INTAKE temperatures? no.
underhood temps, perhaps... |
08-24-2013, 10:30 AM | #24 |
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I've never wrapped my headers or bagged my turbo, however, I'm a strong believer in coatings. Calico has coated several turbo manifolds, DP's, and turbine housing or me in the past. I usually go with their 1600F coating.
And in all honesty, $ for $ it's the exact same cost as wrapping. As for results, engine bay temps have been dropped significantly. I've never taken an exact measuring, as I'm usually measuring EGT's on the inside of the tube not outside. |
08-24-2013, 01:34 PM | #25 |
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A barrier is better than coating. When I was playing at Volvo Powertrain I tested some stuff from Thermal Structures. It was awesome. I currently have a sheet of it protecting power steering lines from my uppipe/ewg/downpipe.
DIY version: wrap and put some loose, stainless foil to be a barrier. Loose to jeep the air gap which will aid in keeping the heat transfer down. |
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