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info on converting my race car to a 993 rear suspension
I am looking for any information, pictures or contacts regarding an update to a 996 or 993 rear multi-link suspension from the older trailing arm style that I currently have on my race car.
I know it has been done but I cannot find any info on it. Any help would be appreciated. I HAVE POSTED AN UPDATE AND SOME PHOTO'S OF THE 993 REAR SUSPENSION INSTALLED IN MY 78 SC CHASSIS (4/6/06)
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1978 race car scca GT2 1998 C2S sold 1996 C4S sold 1973 911 T restored with 2.7 RS running gear 1970 911 E Project Last edited by jwerion; 04-06-2006 at 09:45 PM.. |
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09-22-2005, 09:11 PM
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Does any one have any information on this at all?
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1978 race car scca GT2 1998 C2S sold 1996 C4S sold 1973 911 T restored with 2.7 RS running gear 1970 911 E Project |
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09-23-2005, 07:51 AM
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Home of the Whopper
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There was an article in Excellence a few years back on an early car which was converted to 993 suspension. It wasn't a tech article, but did show some pictures. Jeff Gamroth at Rothsport, aka flipper, did the work.
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1968 912 coupe 1971 911E Targa rustbucket 1972 914 1.7 1987 924S |
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09-23-2005, 08:44 AM
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I helped with a conversion like this a few years ago. You can P.M me and I will tell what I know. Pretty neat, but pretty involved as well.
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09-23-2005, 09:01 AM
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I don't know if Steve Weiner has done the 993 swap. I don't know if anyone has done the 996 swap. Based on the changes to the unibody with the 996, it would be much more work to do it with a 996 rear end, and it's definitely no walk in the park with the 993 components. Among other things, you need a jig to get everything lined up perfectly. You also need to cut out a lot of the recipient car's suspension, and build shock towers strong enough to support the weight of the car.
This thread on Rennlist has Cary Eisenlohr sounding in on it. He's done a bunch of the swaps, but I think in conjunction with shops that have set up the jog for it. This guy did it on his own. Most of his site is in Swedish, but even he ended up with problems, as are noted in this old Pelican thread.
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Jack Olsen 1972 911 My new video about my garage. • A video from German TV about my 911 |
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09-23-2005, 12:21 PM
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Limbo
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Big ol built Duramax Durango R/T 19’ Current Custom project V8 M3 08’ Built and spoiled |
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09-23-2005, 01:28 PM
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Jack very helpfull,
mt912rs I have sent you a pm Randywebb I have searched rennlist and posted it there as well BK911 I have sent flipper an e-mail Thanks to you all for your help
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1978 race car scca GT2 1998 C2S sold 1996 C4S sold 1973 911 T restored with 2.7 RS running gear 1970 911 E Project |
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09-23-2005, 01:30 PM
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Slider very helpfull, This project does not look impossible so I am going to move ahead with it. Thanks
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1978 race car scca GT2 1998 C2S sold 1996 C4S sold 1973 911 T restored with 2.7 RS running gear 1970 911 E Project |
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09-23-2005, 01:38 PM
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Limbo
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Keep us informed, since I am not too far from you I wouldn't mind seeing it at some point....
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Big ol built Duramax Durango R/T 19’ Current Custom project V8 M3 08’ Built and spoiled |
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09-23-2005, 01:43 PM
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Thx jack - very complete.
jwerion - you ARE going to document every step and problem on a thread, right??? and Good Luck!
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"A man with his priorities so far out of whack doesn't deserve such a fine automobile." - Ferris Bueller's Day Off Last edited by randywebb; 09-23-2005 at 05:20 PM.. |
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09-23-2005, 05:13 PM
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As prommised here is an update of the now complete 993 rear suspension conversion on my 1978 SC based race car. I am very glad I decided to have 3R automotive do this job as it was very involved and required some expert fabricating.
  
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1978 race car scca GT2 1998 C2S sold 1996 C4S sold 1973 911 T restored with 2.7 RS running gear 1970 911 E Project |
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04-06-2006, 09:37 PM
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Here are some more photo's
  
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1978 race car scca GT2 1998 C2S sold 1996 C4S sold 1973 911 T restored with 2.7 RS running gear 1970 911 E Project |
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04-06-2006, 09:42 PM
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It's fabulous! Now, we need some driving impressions...
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"A man with his priorities so far out of whack doesn't deserve such a fine automobile." - Ferris Bueller's Day Off |
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04-06-2006, 09:45 PM
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Randy, It was just finished and I have not had time to get to the track. I hope to get some seat time next week.
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1978 race car scca GT2 1998 C2S sold 1996 C4S sold 1973 911 T restored with 2.7 RS running gear 1970 911 E Project |
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04-07-2006, 05:48 AM
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I could stare at those pictures for days.......
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04-07-2006, 06:03 AM
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That's an impressive project. Very pretty as well. I like the ERP arms (I have them too), solid mounts and JRZ's. In the second picture - what's the bent arm? Is that a link for a through-body sway bar??
I have to ask though - why? To a novice like me, it seems like an amazing amount of work in comparision with just stripping a 993 tub. Is there an advantage in class rules? Thanks for sharing, Don
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Don Plumley M235i memories: 87 911, 96 993, 13 Cayenne |
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04-07-2006, 06:28 AM
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Don, There are several reasons. The main reason is that I had already built the car, the other is that the older chassis is lighter than a 993 and up untill recently there was a class advantage to using the older chassis but now I don't believe that is the case.
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1978 race car scca GT2 1998 C2S sold 1996 C4S sold 1973 911 T restored with 2.7 RS running gear 1970 911 E Project |
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04-07-2006, 07:52 AM
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I am wondering if hanging the two rear hubs from a full custom made suspension with Bilstein coilovers would be easier? I have a 912 right now that I am thinking about selling. Body isn't bad, whole thing isn't that bad so I was thinking about just swapping in a bigger Porsche engine but then realized that the suspension is crap (66 912) so why not make one? Perhaps its not easier?
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04-07-2006, 09:03 AM
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I don't think that would give you the same control of tire attitude that the multi-link does. I don't know which parameters are th e problematic ones that change under suspension travel (Camber, caster, toe) but I'm pretty sure one or more are.
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"A man with his priorities so far out of whack doesn't deserve such a fine automobile." - Ferris Bueller's Day Off |
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04-07-2006, 09:13 AM
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nice job did you tie the sub frame into a roll cage?, great job, Kevin
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04-07-2006, 10:04 AM
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Olive
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Ruby
Brownie
Gone but not forgotten
‘05 Duramax
Durango R/T
1984 Porsche Carrera 3.2 
1987 Porsche Carrera 3.2 
