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Join Date: Mar 2008
Location: Fairhaven Ma.
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930 rebuild

Hi I am rebuilding my 86 930 and i have two sets of cams 87 carrera and 82 sc cams what one will be best?thanks for any input(first post)
Old 05-04-2008, 06:32 PM
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Everything I've heard says SC cams for more low end power.
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Old 05-04-2008, 06:35 PM
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OFF THE BOOST PIPE NOW...
 
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No info on the Carrera cams, but I've heard what Mark said.
Old 05-05-2008, 05:13 AM
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Aren't the cams the same for the SC and Carrera? I think the only difference between the cars was where Porsche ended up with timing them.....Porsche played around with advancing and reatrding the cams during those SC years, and finally split the difference with the Carrera engines is what I have heard/read.
I say pick the ones in the best condition and run those....unless I am wrong with above statement.
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1979 930 Turbo....3.4L, 7.5to1 comp, SC cams, B&B intercooler, Snow Perf water/meth injection, Rarlyl8 headers, Garret GTX turbo, 36mm ported intakes, Innovate Auxbox/LM-1, custom Manually Adjustable wastegate housing (0.8-1.1bar),--running 0.7bar max
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Old 05-05-2008, 06:35 AM
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I think Fredmiester is correct from what I remember.
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Old 05-05-2008, 07:07 AM
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The SC and the carrera cams I believe are the same. Most people spend lots of time deciding on the SC grind vs. the 964 grind. The SC and 964 cams are not the same profile. The SC grind has will give better low end power/torque but does give up some in the higher rev's, while the 964 is a more aggressive profile which will yield better top end power. Both work pretty well with CIS cars, but if you eventually want to go the EFI route, the 964 grind will be better suited. I went through all of this several years back and did lots of research. I finally settled on the CS330 grind, which is a hybrid of the two. I love them- the car pulls like a freight train all the way up to 7000 rpm, although my engine has lots of other mods as well- ported heads, kokeln, K27-7200, etc. Most people I have spoken with with SC cams really like them too- they are a big step in the right direction compared with the stock cams. Best of luck!

Sincerely,
Keith
1982 930 (351 rwhp)
Old 05-05-2008, 06:58 PM
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What can one reasonably expect to score a set of used SC cams for - just querious thanks.
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| '58 TR3A | '01 //S8 | '95 //S6 6gang | '88 ///M5 | '87 190E 2.3-16 |
Old 05-06-2008, 05:02 AM
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The stock SC cams will need to have a machined extension on them in order to mate up with the turbocharger sump pump.
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Dave
'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P
Old 05-06-2008, 05:41 AM
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The other way is to have the 930 cams reprofiled to SC specs.
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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.

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Old 05-07-2008, 10:49 AM
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