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Registered
Join Date: Jan 2001
Location: jamestown,nc
Posts: 218
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heat sheets?
has anyone used these or seen these? i saw them at the tweeks web site for the first time today and it looked interesting to me.
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07-22-2001, 03:34 PM
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Registered
Join Date: Jul 2000
Location: So. Calif.
Posts: 19,910
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Fred,
You can get more info at: http://www.seinesystems.com Sherwood Lee http://members.rennlist.org/911pcars |
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07-23-2001, 08:46 AM
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Registered
Join Date: Oct 2000
Location: Nor-Cal
Posts: 4,403
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Fred,
I looked into putting one of these "Snake Oil" heat shields on my car. What i found is they only help to block radiant heat from the CAT. Since the cats get very hot, when they still have all the honeycomb inside. If your Cat has been hollowed (such as mine) or you are running a test-pipe, you really won't see a temp drop. The best advice I ever recieved was to replace my oil temp sender and gauge with a numbered version. This let me see that my car was really only running at 200 F. while driving hard and on hot days. Where before I thought I was cooking my oil.  ------------------ Matt Chamblin 78 911 SC |
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07-23-2001, 03:56 PM
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Senior Member
Join Date: Jan 2001
Location: Left Coast, Canada
Posts: 4,572
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Matt is right-on. The cat is a major contributor to excessive heat on the drivers side valve cover. The cat is very hot and very close, and cooks the cover and the oil flowing inside it. When I installed a test pipe in place of the cat, the temps dropped dramatically; far more than can be expected from a simple sheet of metal (Heetsheet).
------------------ '81 SC Coupe (aka: "Blue Bomber") Canada West Region PCA The Blue Bomber's Website |
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07-23-2001, 04:15 PM
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Not quite. The heat sheet acts as a heat "sump" or "sink." I use them on my 914-6 (with a 2.7) and I did, in fact, see a measurable temperature difference from pre-install to post-install. I don't have a cat, nor do I have thermal reactors. Sorry guys, but anything that precludes heat from infiltrating the engine, and "superheating (in the strictest sense of the word)" the cooling medium, is a good thing.
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07-23-2001, 06:00 PM
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Registered
Join Date: Jun 2000
Location: Southern California
Posts: 251
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Wow, I've seen a heat shield similar to Heet Sheets, used on a factory 935 turbo race car. I guess that would also make the Porsche Factory a dealer in snake oil.
Get a life guys. |
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07-23-2001, 08:04 PM
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I have these on my '85. I didn't notice much in the near winter when I installed them.
Not sure if they did much for my summer drivinng. I might have saved 10 degrees F. OH-well, I was bored and had around $60 bucks lying around.... Now I got rid of my cat and lost another 10 degrees or so  I thinked I joined the "RICER" crowd. I like the off-idle rumble I get with the cat gone. Now I am looking to TINT my windows, and get a REALLY big exhaust, like 4" or so... yeah, yeah, THAT's the ticket! ------------------ Nick Hromyak '85 Carrera 7 & 9 Fuchs Havin' Fun in Sacramento |
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07-23-2001, 11:26 PM
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On my transplanted 3.6 I made some homegrown versions. Their main function was to keep radiant heat from the rubber components associated with the lower row of plugs. A secondary function was to keep crud from the tires away from the same area.
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07-24-2001, 03:43 AM
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Registered
Join Date: Oct 2000
Location: Nor-Cal
Posts: 4,403
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Don, that's great if this product really works. I'm happy it wasn't a waste of money, and your happy with it.
RFNG, what do mean get a life? I was just trying to help Fred with his question. ------------------ Matt Chamblin 78 911 SC |
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07-24-2001, 07:40 AM
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1975 Porsche 914 2.7
Porsche
1976 Porsche Carrera 3.0
1995 Porsche 993 Carrera Coupe
