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Registered
Join Date: May 2005
Location: Vancouver Island , British Columbia , Canada
Posts: 428
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High Temperature
Hi,
I just finished building my 1977 , 930 Turbo, I started with a tub and added every thing else. The car starts well and runs well but the heat behind the rear bumper is very high. It appears to be a muffler heat . I am concerned that the heat may melt the Porsche reflector that runs above the license plate. Also the bumper itself is very hot. I have a heat shield installed inside the rear bumper but it is not helping. Do you think that the heat will dissipate when car is driven or will increase ? Do you think the engine is running to hot and requires additional cooling ? Please let me know if you have a solution to this issue or if you have any recommendations . Many thanks in advance. |
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10-09-2008, 05:28 PM
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Registered
Join Date: Jan 2008
Location: Birmingham, AL
Posts: 538
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The rear bumpers get HOT on 930's at a standstill, it's mostly from the turbo.
I believe there are multiple heat shields? Have you checked ignition timing? If it's retarded the EGT will go up considerably, even at idle Too rich or lean AFR won't help either. Does your engine have an air pump system, if it doesn't turnoff, it could affect EGT as well. There are thermo-vacuum valves originally to turn off the air injection when the engine warms up, if one of these was overlooked or bypassed it could cause high EGT... Perhaps take some readings off the bumper w/ infrared probe and report back w/ more details i.e. ambient temp, run time since cold, etc. etc. Good luck
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Professional Overcomplicator |
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10-09-2008, 08:20 PM
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Registered Driver
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Mine gets really hot too.
Too hot to touch at times and I wondered the same about the reflector, paint, etc. but it still looks good as new. BTW I have no air pump/injection.
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Ben '85 930 - Black on Black '95 993 Turbo - Silver |
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10-09-2008, 08:40 PM
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Registered
Join Date: Jul 2003
Location: Back in B'ham, AL
Posts: 3,459
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It is the nature of the beast. Mine gets real hot also about 140* or so. No problems after 30 years.
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10-09-2008, 09:20 PM
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Registered
Join Date: May 2005
Location: Vancouver Island , British Columbia , Canada
Posts: 428
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Thanks for your input.
The temperature at the gauge is about 200* and almost 130* at the Bumper and reflector. I will take the car for Ignition timing and see what effect this will have on high temp. I will post results Thanks again |
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10-10-2008, 05:49 PM
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Registered
Join Date: Jun 2001
Location: Sweden
Posts: 5,911
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Check ignition timing, if delayed headers will glow and everything gets very hot. Turbo bearings don't like it either. Remove and plug air injection if legal in your state. (six 10x1 plugs needed).
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Thank you for your time, |
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10-11-2008, 08:30 AM
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Me like track days
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 10,209
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My reflector melted right off.....somewhere on highway 167 sits a $150 piece of P O R S C H E plastic ;-)
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ - "930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe Movie: 930 on the dyno |
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10-11-2008, 01:46 PM
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A fellow Pelacanite
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My 964 one is a little warped too, but only on the back where it's not seen.
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG. Fitting - New service kit. Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head. 1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods. Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit. http://www.danasoft.com/sig/Iamnotanumber.jpg |
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10-11-2008, 05:17 PM
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