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Science is NOT optional
Join Date: Aug 2008
Location: West and further west
Posts: 1,986
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What's a 1993 964 got that a 1991 doesn't?
Beyond the LUK dmf, cylinder gasket, and dual distributor vent that is.
I'm closing in on a C2 and want to know a bit more about the upgrades. I believe the brakes are different. Is the interior different? How about the suspension, etc?
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11-10-2009, 02:50 PM
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Tear drop mirrors and Cup wheels.
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Travis 1993 964 Oak Green Metallic C2 Targa Mods: H&R Reds, Bilstein HDs, Cat Bypass, Cup Bypass, Steve Wong Chip, Strut Brace, Wevo Black |
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11-10-2009, 06:31 PM
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Unless it is a turbo, they have the teardrop mirrors and cup wheels...
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1991 964 Polar Silver Metallic Turbo Coupe |
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11-10-2009, 06:32 PM
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Science is NOT optional
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Yes, that's right. And with the 17" wheels a 10mm steering stop.
What else could Porsche have improved to help. Does anybody know:Are the front brakes unchanged? Did they go to red calipers? Were the windshield wiper arms upgraded 1993? I think someone said something about double springs. Are the door thresholds and latches changed?
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PCA member since 1993 |
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11-10-2009, 06:47 PM
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My 93 has black calipers.
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Travis 1993 964 Oak Green Metallic C2 Targa Mods: H&R Reds, Bilstein HDs, Cat Bypass, Cup Bypass, Steve Wong Chip, Strut Brace, Wevo Black Last edited by PNine64; 01-11-2010 at 08:25 PM.. |
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11-10-2009, 06:51 PM
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The rear brakes on the C2 were changed from 2-pot to the same 4-pot calipers used on the C4. All 964 calipers are black as standard apart from the Turbo 3.6 which had red.
Air bags and the consequently revised interior/dash were standard by '93 but I suspect that even the US '91 cars had airbags. It was only the RoW cars that waited until around '92 to get them. The dual spring wiper arms were certainly a late addition but I don't have any details about the introduction date. I'm not sure the distributor vent ever reached a production 964. I've certainly seen very late cars without it. I think it may have only been introduced in production for the 993. Regards Dave |
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11-11-2009, 02:29 AM
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Didn't the intake change from aluminum to plastic in late '91 or '92?
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Joe 1993 C2 |
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11-11-2009, 07:38 AM
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993
The most important difference..headgaskets!!!!!!!
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11-11-2009, 02:01 PM
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Location: Houston
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R-134a air conditioning ('92 and earlier was R-22).
Every single change can be found in Adrian Streather's book on the 964. If you are trying to understand 964s, you need to buy that book. Last edited by cwrm4; 11-11-2009 at 02:52 PM.. |
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11-11-2009, 02:49 PM
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Don't say R-22, it was R-12 for the air conditioning.
Mark
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1991 964 Polar Silver Metallic Turbo Coupe |
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11-11-2009, 06:46 PM
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Science is NOT optional
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Location: West and further west
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Oh yeah, head gaskets and refrigerant. And the A/C conversion required different components too, do you know what they were?
As for the Streather book, good point, I am wait listed. Our host is back ordered but I tried here first a couple weeks ago. Anyone got the corresponding info?
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11-11-2009, 08:51 PM
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Quote:
Not sure what the exact parts for the AC conversion are; I think on the Rennlist 964 forum there were a couple long threads on the topic.
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'70 911T '73 911S '93 964 C2 |
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11-12-2009, 08:22 AM
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I had just read a story about a guy who used R-22 (home and commercial building refrigerant) in his car. The compressor seized, broke the fan belt, car overheated, and blew a head gasket. I'm not being politically correct here, this is a safety issue.
The conversion can be done one of three ways: 1) If your system is empty, remove the fitting that allows you to add R-12 and install the R-134a fitting. The fitting is about $11.50 here: A/C Adaptor Kits & Fittings Recharge the system with the correct amount of R-134a. 2) Have the system professionally ($) evacuated, replace the receiver-dryer, change the fittings as above, re-evacuate the system, replace the 4 oz. of compressor mineral oil with R-134a compatible PAG-46 oil, and recharge the system with the correct amount of R134a, about 30 oz. 3) Buy the kit from our sponsor, P/N 10-7504-128-M207. Then recharge the system as above after a vacuum evacuation. Good Luck, Mark
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1991 964 Polar Silver Metallic Turbo Coupe Last edited by lucittm; 11-12-2009 at 06:24 PM.. |
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11-12-2009, 06:20 PM
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Second-hand knowledge:
92-94 More clutch pressure plate clamping force, and less-stiff spring rates too...
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1991 964 C4 Cabriolet - drop-top pylon destroyer |
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11-13-2009, 12:44 PM
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Quote:
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96 993 88 911 (Sold) 87 951 (Sold) |
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11-13-2009, 12:50 PM
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Science is NOT optional
Join Date: Aug 2008
Location: West and further west
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Did the windshield wiper arms go to 2 springs each?
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PCA member since 1993 |
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12-29-2009, 10:54 AM
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Metal Guru
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Quote:
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Paul B. '91 964 3.3 Turbo Port matched, SC cams, K27/K29 turbo, Roush Performance custom headers w/Tial MV-S dual wastegates, Rarlyl8 muffler, LWFW, GT2 clutch & PP, BL wur, factory RS shifter, RS mounts, FVD timing mod, Big Reds, H&R Coilovers, ESB spring plates- 210 lb |
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12-29-2009, 07:27 PM
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P-Zero Burner
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Quote:
I believe shock mounts changed slightly after 91
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Stephen 2006 997 Carrera S - Sport Chrono, Full Leather 1968 912 - Purchased from Vasek Polak in 1971 and still in the family ----- 1989 Carrera 4 - Andial service history, Sold and missing it Last edited by 911Urge; 12-29-2009 at 08:44 PM.. |
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12-29-2009, 08:41 PM
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Quote:
Great if you want to know some info regarding MY differences but after that it's VERY light on any how to. He also goes on and on about how you can't use 18" wheels on these cars yet everyone I know who Club Races this series 911 runs 18"s. 
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You will never know the feeling of a driver when winning a race. The helmet hides feelings that cannot be understood. Ayrton Senna 1993 964 RS |
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12-30-2009, 07:28 AM
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I have it. Nice to have but you get more detailed information from here and RL (plus you can ask questions).
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Travis 1993 964 Oak Green Metallic C2 Targa Mods: H&R Reds, Bilstein HDs, Cat Bypass, Cup Bypass, Steve Wong Chip, Strut Brace, Wevo Black Last edited by PNine64; 01-11-2010 at 08:26 PM.. |
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12-30-2009, 08:42 AM
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1993 Porsche 964
1991 Porsche 964 Turbo 3.3L
1968 Porsche 911L 2.0
964
1991 Porsche 964 Turbo
Silver Bullet
Red 64
Blue Mood 912
