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User
Join Date: Feb 2006
Location: Oakland
Posts: 940
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Does anyone prefer CIS over Motronic ?
Yeah, stole this from the 915/G50 thread. :P
Just wondering. If so, why? Thanks.
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82 Targa |
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04-09-2006, 05:04 PM
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Registered
Join Date: Feb 2003
Location: Valley Center, CA
Posts: 111
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Let's just get to the meat...does anyone prefer the SC's to the Carreras!
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04-09-2006, 05:14 PM
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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,167
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CIS is 98.732% mechanical.
Better throttle response. Turn a screw a few degrees and it passes emissions . .. turn it back and it runs great.
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong. Disclaimer: the above was 2¢ worth. More information is available as my professional opinion, which is provided for an exorbitant fee. 
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04-09-2006, 05:16 PM
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I'm with Bill
Join Date: Jun 2005
Location: Scottsville Va
Posts: 24,186
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My SC isn't the first cis car I have owned, I find the system easy to work on and it pulls like a train. It isn't as flexable as the motronic, so hopping it up takes a little more work. Apples and oranges
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Electrical problems on a pick-up will do that to a guy- 1990C4S |
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04-09-2006, 05:19 PM
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Matthew “Sometimes the questions are complicated and the answers are simple.” |
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04-09-2006, 05:31 PM
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Join Date: Jan 2003
Location: Langley,B.C.
Posts: 12,025
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Nope, can't say that I do. If you to pass emmisisons with you motronic car, just take it in for testing..........
Cheers
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Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
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04-09-2006, 05:52 PM
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Matthew “Sometimes the questions are complicated and the answers are simple.” |
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04-09-2006, 05:57 PM
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Registered
Join Date: Apr 2003
Location: Las Cruces, NM
Posts: 2,459
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Depends on your point of view, some people like the mechanical aspect of cis, and it's turn screw adjustability. I like Electronic control because it takes what a bunch of pneumatic and other mechanical things can do, into a few silicon integrated circuits. And when i ever get to converting me CIS to efi, i'll let you know just how slow my throttle reacts
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2007 Mazda 3 hatch 1972 Porsche 914 roller with plenty of holes to fix 
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04-09-2006, 06:06 PM
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Registered
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 12,025
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Porscheguy, I was just responding to Island's comment.
Cheers
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Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
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04-09-2006, 06:33 PM
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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,167
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I really think the Q should have been: Does anyone prefer CIS to Motronic (with a spare DME relay and a Steve Wong chip . .. and new rod bolts to handle the higher rev's) --Just to make it fair.
oh, almost forgot .. . MUHAHAHAHAhahahahaaa. . ..
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong. Disclaimer: the above was 2¢ worth. More information is available as my professional opinion, which is provided for an exorbitant fee.
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04-09-2006, 06:51 PM
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Designer King
Join Date: Mar 2004
Location: Toronto, ON Canada
Posts: 5,499
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I like the ease of diagnosing problems and tuning of the CIS. It's more in keeping w/ the old school mentality of the typical shade tree mechanic (like me).
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Paul Yellow 77 Sunroof Coupe/cork interior; 3.2L SS '80 engine/10.3:1/No O2; Carrera Tensioners; 11 Blade Fan; Turbo tie rods; Bilstein B6; 28 tube Cooler; SSI, Dansk; MSD/Blaster; 16x7" Fuchs/205/50 Firestone Firehawk Indy 500s; PCA/UCR, MID9 Never leave well enough alone |
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04-09-2006, 08:15 PM
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Matthew “Sometimes the questions are complicated and the answers are simple.” |
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04-09-2006, 08:39 PM
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I guess I will go ahead and relay my observations.
My father's car is a 77s with a 3.2, SSIs, some ignition work etc. What I like is the smoothness to the motor, it is much more like a modern day car in that aspect. I think the pull it has on the high end is awesome and really enjoy the car all around. But that said, my CIS Euro 3.0 has less power overall I imagine but a much bigger mid range punch. I love the grunt of my little motor, with strong "throw your head back" acceleration that is a bit more fun for the driver and passenger alike. My dad and I should do a pull and see how similar our power is.
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Matthew “Sometimes the questions are complicated and the answers are simple.” |
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04-09-2006, 08:43 PM
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Registered
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 12,025
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NO offense taken at all!
 I have owned 3 motronic 911's and 3 cis ones. I like the motronic, it is nice and simple from an owners standpoint. Does not require adjustment or maintenance really. Cis works well too when it is tuned properly. I rebuilt a couple of SC motors last year and found the whole cis plumbing and such to be a bit combersome, but the motors ran well and were very strong once I had them dialed in.Rod bolts have nothing to do with it, but you already know that Cheers
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Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
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04-09-2006, 09:26 PM
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Irrationally exuberant
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CIS = Complicated Icky System
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'80 911 Nogaro blue Phoenix! '07 BMW 328i 245K miles! http://members.rennlist.org/messinwith911s/ |
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04-10-2006, 04:03 AM
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Original Owner
Join Date: Dec 2002
Location: San Antonio, Texas
Posts: 1,907
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I prefer Bosch Motronic ME 7.5 with my laptop running VAG-COM......
But for a 28 year old SC .............. K-Jetronic is just fine. For you whiners...why not put in ABS and Airbags too with your EFI...and a little GPS nav toy. Next to your Latte holders... Muhahahaha! Must be a Cali thing...
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tsuter 78 911SC Turbo Targa Thaaaats Right!! |
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04-10-2006, 05:41 AM
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MBruns for President
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I think the guys who like to tinker like the CIS...
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Current Whip: - 2003 996 Twin Turbo - 39K miles - Lapis Blue/Grey Past: 1974 IROC (3.6) , 1987 Cabriolet (3.4) , 1990 C2 Targa, 1989 S2 |
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04-10-2006, 05:55 AM
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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,167
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With all the endless "chip" threads here; I think the guys who like to talk like EFI.
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong. Disclaimer: the above was 2¢ worth. More information is available as my professional opinion, which is provided for an exorbitant fee.
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04-10-2006, 07:28 AM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 56,233
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Just trying to keep things fair. Oh, and don't forget to get the license plate of the Carrera as he passes you because of the extra power and the improved fuel mileage because of the advanced fuel management system. Not that there's anything wrong with CIS. It's just not the best system.  PS Looking for a show of hands here, who would rather have their DME relay crap out than their timing chain tensioners at 70mph on the freeway? OK, thx.
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
Last edited by masraum; 04-10-2006 at 07:56 AM.. |
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04-10-2006, 07:54 AM
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MBruns for President
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Current Whip: - 2003 996 Twin Turbo - 39K miles - Lapis Blue/Grey Past: 1974 IROC (3.6) , 1987 Cabriolet (3.4) , 1990 C2 Targa, 1989 S2 |
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04-10-2006, 07:56 AM
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1979 Porsche 911 SC (ROW) Rebuilt 3.0
The Blue Pheonix
Gone to California
Turbo
