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Old 60's Porsche Tech
Join Date: Jan 2009
Posts: 369
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85 carrera removing heat shield under cat???
It looks like removing this would be a good thing. I think it would blow more heat away from the engine with it off. I don not plan parking at an idle in a brush area. Feed black please any down side? I took it off today to clean 20 years of smutz of it. thanks JL
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1987 911 Cab TRE engine  1952 356A sold  ,1960 356B totaled hit by drunk totaled  1979 911 sc Targa sold,1984 911 3.2 Targa sold,1985 911 3.2 Coupe sold 1987 3.2 coupe sold to my son PARTS ENDLESS WORK $$$$$ PREPARING and driving your PORSCHE anywhere with confidence PRICELESS!!
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03-08-2009, 02:45 PM
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THE IRONMAN
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Mine is removed since the bypass cat two years ago....No down side yet.
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1984 911 CARRERA RUBY RED TARGA SW CHIPPED-BURSCH CATBYPASS MONTY FREE FLOW EXHAUST <IN GAS WE TRUST> |
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03-08-2009, 04:01 PM
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R&D guy
Join Date: Sep 2007
Location: the border between the states of inebriation & confusion
Posts: 2,037
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I took the heat shield off my '87 and ran it for awhile that way before putting on the Euro-type premuffler.
With the cat & without the heat shield, the wheel and tire on that side were notably hotter than with the heat shield, as measured with an IR temperature gauge. Being conservative and not wanting to encourage any premature failures in the wheel/tire/brake area on a 20 year old car, I put the heat shield back on until I had time to install the premuffler that eliminated the cat. Last edited by dw1; 03-09-2009 at 09:25 AM.. |
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03-08-2009, 04:58 PM
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Registered
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I don't plan on parking at an idle in a brush area.
I removed a spare tire from a car once because I had never gotten a flat before and. ........... I drove a bit faster around a corner one day because I said I was not going to have an accident and ............ I know many people who to took out large home equity loans and.......... |
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03-09-2009, 03:17 AM
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Old 60's Porsche Tech
Join Date: Jan 2009
Posts: 369
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Kuehl:
Thank you for your enlightening series. I will keep them in mind. I ask about the down side of removing the heat shield from my car one day and ............. Anyone have any technical information of what the results would be of removing the heat shield and still running with the cat installed? My original question might not have been clear, Thanks JL
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1987 911 Cab TRE engine 1952 356A sold ,1960 356B totaled hit by drunk totaled 1979 911 sc Targa sold,1984 911 3.2 Targa sold,1985 911 3.2 Coupe sold 1987 3.2 coupe sold to my son PARTS ENDLESS WORK $$$$$ PREPARING and driving your PORSCHE anywhere with confidence PRICELESS!!
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03-09-2009, 07:28 AM
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Registered
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Your quite welcome.
You answered half of the quiz yourself! en ....lightening Your car will be lighter. And, DW1 answered the other half .... TIRE WILL BE HOTTER However, if you are getting the car inspected, say for a track event or for a local MV annual, they can offer a more unique critique. Last edited by kuehl; 03-09-2009 at 10:55 AM.. |
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03-09-2009, 10:52 AM
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Old 60's Porsche Tech
Join Date: Jan 2009
Posts: 369
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I am really beginning to enjoy this forum, Love the color and the size of Font on "TIRE WILL BE HOTTER", but I thought you would have italicized the "Unique Critique" thank you JL
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1987 911 Cab TRE engine 1952 356A sold ,1960 356B totaled hit by drunk totaled 1979 911 sc Targa sold,1984 911 3.2 Targa sold,1985 911 3.2 Coupe sold 1987 3.2 coupe sold to my son PARTS ENDLESS WORK $$$$$ PREPARING and driving your PORSCHE anywhere with confidence PRICELESS!!
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03-09-2009, 11:37 AM
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Registered
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I modified the heat shield and mounted it between the left valve cover and the Cat
 . I put some 800 F thermal material on the Cat side of the shield also. Helped with track oil temps . I'll keep it there with my Cat bypass too.
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1980 911 - Metzger 3.6L 2016 Cayman S |
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03-09-2009, 11:49 AM
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Old 60's Porsche Tech
Join Date: Jan 2009
Posts: 369
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Thanks Ducky,
I got some valueable input, that is what I was looking for, JL
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1987 911 Cab TRE engine 1952 356A sold ,1960 356B totaled hit by drunk totaled 1979 911 sc Targa sold,1984 911 3.2 Targa sold,1985 911 3.2 Coupe sold 1987 3.2 coupe sold to my son PARTS ENDLESS WORK $$$$$ PREPARING and driving your PORSCHE anywhere with confidence PRICELESS!!
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03-09-2009, 11:58 AM
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Registered
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Quote:
Not necessary to use italics on partial quotes. However, if you stick around long enough, we'll remind you where to put your "dots". |
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03-09-2009, 12:04 PM
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Old 60's Porsche Tech
Join Date: Jan 2009
Posts: 369
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If I wanted to be reminded of where to put my dots I would enlist in a literary forum, or an English teachers forum or? If I stick around long enough? You been on the forum since 2004 I guess you must be a real ICON around this forum, Give it a rest. jl
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1987 911 Cab TRE engine 1952 356A sold ,1960 356B totaled hit by drunk totaled 1979 911 sc Targa sold,1984 911 3.2 Targa sold,1985 911 3.2 Coupe sold 1987 3.2 coupe sold to my son PARTS ENDLESS WORK $$$$$ PREPARING and driving your PORSCHE anywhere with confidence PRICELESS!!
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03-09-2009, 12:20 PM
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Registered
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I would imagine when driving through a puddle, it would keep some of the splash off the cat and thus lessen any thermal shock it gets. They're pricey to replace.
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'88 Coupe Lagoon Green "D'ouh!" "Marge - it takes two to lie. One to lie, and one to listen" "We must not allow a Mineshaft Gap!" |
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03-09-2009, 03:27 PM
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Registered
Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 37,625
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I don't have a heat shield. It was broken when I replaced the cat. Lots of them are broken at one of the tabs.
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03-09-2009, 03:50 PM
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Porsche 914
Porsche 911 Carrera
THE ROADSTER
1988 Porsche 911 3.2
