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933 Revival.
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emoore924  



Joined: 13 Apr 2004
Posts: 2790

PostPosted: Sat Jan 25, 2014 9:14 am    Post subject: Reply with quote

I think I have a DP factory parts list someplace. I could probably look it up. Keep in mind the DP cars were supposed to be "kit" cars, assembled by certain dealers for buying (racing) customers. So some variation at build time or in the field is expected.
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fiat22turbo  



Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR

PostPosted: Sat Jan 25, 2014 12:28 pm    Post subject: Reply with quote

Wouldn't they also have to meet the rules in place from the SCCA for that class?

Any idea what the rules were during that time period?

Just curious
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)
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emoore924  



Joined: 13 Apr 2004
Posts: 2790

PostPosted: Sat Jan 25, 2014 1:27 pm    Post subject: Reply with quote

The 1980 SCCA GCR is probably out there on the internet someplace. The 924s ran competitively in DP in 80, 81, 82, then IIRC the rules were changed in 83 (84?) and it really killed DP as a class. That's why most of the DP cars were converted to GT3.
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jimhuiz  



Joined: 16 Dec 2013
Posts: 9
Location: Dayton, OH

PostPosted: Tue Jan 28, 2014 10:21 am    Post subject: Another 933 Question: Reply with quote

Here's another one for you experts out there…

Does anybody know if the snail shell trans in the DP was of the large input shaft variety (as found in the 1980 931)?

Thanks!

Jim H.
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ideola  



Joined: 01 Oct 2004
Posts: 15511
Location: Woodstock IL

PostPosted: Tue Jan 28, 2014 12:07 pm    Post subject: Re: Another 933 Question: Reply with quote

jimhuiz wrote:
Does anybody know if the snail shell trans in the DP was of the large input shaft variety (as found in the 1980 931)?

According to this, yes. I'll try to corroborate that list with the hard copy catalog.
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15 981 GTS | 88 924S SE | 82 931 Holbert | 82 931 Rallye | 81 937 | 81 Euro 931 | 81 Weissach | 80 US 928 | 80 US 931 '941' | 80 US 931 | 80 931 GTR | 79 Sebring | 78 D-Prod Replica | 78 w/D-Prod kit | 78 Poli-Form | 78 Limited Edition | 77 Martini
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jimhuiz  



Joined: 16 Dec 2013
Posts: 9
Location: Dayton, OH

PostPosted: Tue Jan 28, 2014 12:44 pm    Post subject: Reply with quote

Thanks Ideola.

There's a 1980 931 close by (for parts) and I was wondering if the trans might make a good basis for a spare race transmission (for a DP).

Interested in hearing more when you get the chance. Thanks.
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ideola  



Joined: 01 Oct 2004
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Location: Woodstock IL

PostPosted: Tue Jan 28, 2014 12:53 pm    Post subject: Reply with quote

jimhuiz wrote:
Thanks Ideola.

There's a 1980 931 close by (for parts) and I was wondering if the trans might make a good basis for a spare race transmission (for a DP).

Interested in hearing more when you get the chance. Thanks.


Absolutely...once you rebuild it.

If you're planning to put it in an NA, you can use the Ford Bronco II clutch disc and keep your manual clutch. Or if you pick up the parts donor, take the flywheel, pressure plate, pedal assembly and a few other bits, and you can bolt all that straight up to your NA motor and convert over to hydraulic actuated clutch. With the NA clutch cables being NLA, this seems to be a good way to go if it's allowed in the class you are intending to race.
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15 981 GTS | 88 924S SE | 82 931 Holbert | 82 931 Rallye | 81 937 | 81 Euro 931 | 81 Weissach | 80 US 928 | 80 US 931 '941' | 80 US 931 | 80 931 GTR | 79 Sebring | 78 D-Prod Replica | 78 w/D-Prod kit | 78 Poli-Form | 78 Limited Edition | 77 Martini
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emoore924  



Joined: 13 Apr 2004
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PostPosted: Tue Jan 28, 2014 2:15 pm    Post subject: Reply with quote

Huh? Clutch cables NLA? That's not good.

At the risk of a hijack, what years and models?
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ideola  



Joined: 01 Oct 2004
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Location: Woodstock IL

PostPosted: Tue Jan 28, 2014 2:25 pm    Post subject: Reply with quote

I could be wrong about that. I seem to remember trying to order one and not being able to get it. Porsche's online catalog has them listed at $158.70, and Pelican shows them for $44.35. Rock Auto shows a remanufactured part on wholesaler closeout for $17.10.

I don't know if Pelican's part is an OEM part...that's a pretty big price disparity. Just be aware that Porsche's catalog is notorious for showing stuff that isn't actually available.
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15 981 GTS | 88 924S SE | 82 931 Holbert | 82 931 Rallye | 81 937 | 81 Euro 931 | 81 Weissach | 80 US 928 | 80 US 931 '941' | 80 US 931 | 80 931 GTR | 79 Sebring | 78 D-Prod Replica | 78 w/D-Prod kit | 78 Poli-Form | 78 Limited Edition | 77 Martini
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emoore924  



Joined: 13 Apr 2004
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PostPosted: Fri Jan 31, 2014 12:27 am    Post subject: Reply with quote

Ok, I found bunches on eBay so they seem to be out there. Whew!

Now back to our regularly scheduled thread...
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ideola  



Joined: 01 Oct 2004
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Location: Woodstock IL

PostPosted: Fri Jan 31, 2014 1:20 am    Post subject: Re: Another 933 Question: Reply with quote

ideola wrote:
jimhuiz wrote:
Does anybody know if the snail shell trans in the DP was of the large input shaft variety (as found in the 1980 931)?

According to this, yes. I'll try to corroborate that list with the hard copy catalog.


I had an opportunity to pore through the 933 parts catalog yesterday. It is a first edition catalog dated 1979. According to it, the factory program supported a manual clutch arrangement identical to the normal NA, but with a 933-specific part for the clutch disc. The torque tube and input shaft coupler all appear to be regular 477 prefix NA parts. I haven't had a chance to compare to PET, but it appears to me that the original 933 program used the standard NA version of the snailshell as a base, not the G31. Now, the guts, however, are quite different, as there are a variety of 915, 917, 931, and 935 part numbers that were available through the program.

So to answer the original question, it appears that the original DProd had the 19mm input shaft version of the snail shell.

I also looked in the body section. There is no mention of lexan or plexiglass; however, there is a unique 933 part number for the rear quarter windows, so it's possible that they were in fact plastic of some sort. The catalog simply doesn't clarify, it just shows a 933 part number. The door windows were listed as the standard fare 477 part number.

As for the hatch, it's much harder to tell. There is a single page with a 933 part number called HECKKLAPPE which is translated as "rear flap" (the catalog is in German and English). But it doesn't have a drawing to indicate if this is the entire hatch, the glass, a spoiler, or what; nor does it indicate material. So the mystery remains on the rear hatch.

As for the bumpers, the catalog lists the standard 477 US-spec bumpers, but has a unique 933 part number for the brackets, so it appears they eliminated the bumper shocks.

There are a whole bunch of other fascinating and tantalizing details revealed in the catalog, which I will share as time permits.
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15 981 GTS | 88 924S SE | 82 931 Holbert | 82 931 Rallye | 81 937 | 81 Euro 931 | 81 Weissach | 80 US 928 | 80 US 931 '941' | 80 US 931 | 80 931 GTR | 79 Sebring | 78 D-Prod Replica | 78 w/D-Prod kit | 78 Poli-Form | 78 Limited Edition | 77 Martini
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emoore924  



Joined: 13 Apr 2004
Posts: 2790

PostPosted: Fri Jan 31, 2014 2:06 am    Post subject: Reply with quote

I found the same things in my parts list too.

Regarding the shaft, the results are... inconclusive. The book I have says 477 392 191 B for the shaft (924 part) and 933 116 011 50 for the clutch disk. I'd have to guess that's the same shaft for the 016 tranny or the part # would start with something else (931, 933...) but without crossing that part # with the 924 book, and based on the 477 I'm thinking 19 spline.

I also checked a couple of the pics I have with the DP parts laid out on the floor and the hatch IS one of the parts included in the kit. I can't tell whether it is lexan or glass, and it does have a spoiler which the 79 na did not have (so that could be the "flap"), yes there is a complete hatch being presented as part of the kit in the pics... but I'm thinking the part # is for the spoiler only.
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jimhuiz  



Joined: 16 Dec 2013
Posts: 9
Location: Dayton, OH

PostPosted: Sun Feb 02, 2014 12:12 pm    Post subject: Re: Another 933 Question: Reply with quote

So you believe the bumpers are supposed to be metal and not fiberglass as per the cars on the Freisinger site?

I know the 0014 and 0015 car were 1000s of miles apart before they were brought together at Freisinger's and they both have the same bumper covers…seems like a period piece.

EDIT - Here's what someone who was there in the day said about the bumpers…

"The bumpers were German made fiberglass; both front and rear. They were mounted with special (fabricated) aluminum brackets. They were NOT standard parts."

As with many things Porsche…it seems there are gray areas when it comes to some of the low production number cars.
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jimhuiz  



Joined: 16 Dec 2013
Posts: 9
Location: Dayton, OH

PostPosted: Mon Feb 17, 2014 2:44 am    Post subject: anybody know this car? Reply with quote

http://www.youtube.com/watch?v=9-5KxQHsdeU

This is a great video of a 924 DP (watched it many times).

Does anyone know the car and/or the current owner?

Thanks,

Jim H.
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emoore924  



Joined: 13 Apr 2004
Posts: 2790

PostPosted: Tue Feb 18, 2014 2:47 pm    Post subject: Reply with quote

That's the north course at Pocono. Don't know who's driving but anything under 1:00 there is pretty fast. The first right-hander off the banking will pucker you right up... big bump going in there. The rest of it is pretty straight forward...
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