Porsche 924 SCCA (924D) 933 (1979)

[924slemans]

Porsche 924 SCCA (924D) 933 (1979)

These cars were designed by the factory to race in SCCA D Production Championship starting in 1979. The Porsche project number of these race cars was 933.
NOTE: Only 16 were built by the factory.....a very low production number for all Porsches....

Porsche provided this “race car kit” in 1979 to race in SCCA D-Production. The 924DP (933) had a 185HP NA 2.0L engine, stripped body shell, 1900 lb, 861 kg, 0 to 60 4.6 sec. 1/4 mile 13.53 sec.

This 933 at 1900 lb has to be the ultimate 924/944/968 because it is very light...lighter is better...see Lotus....it is also quick....the 924 2.0 liter NA is supposed to be slow......

Compared to 1993 968 CS 237 hp 2900 lb 0 to 60 mph 5.5 sec. ...... production number 1900...

factory roll cage, full suspension and everything except the fuel cell bladder, tires and windshield.

For around $40,000, you literally got a race-car-in-a-box, ready to assemble and configure. (That’s about $120,000 in today’s money.) The D-Production 924 was successfully campaigned by Al Holbert and others all over the U.S. from Holbert’s shop in Pennsylvania.

The main parts included:

933 motor with 931 head and 11.3:1 compression
Kugelfischer mechanical fuel injection
Intake manifold for Kugelfischer injection with quad throttle bodies
Oil cooler
Tuned header, exhaust, and megaphone (exit RH side of car)
5-speed snailshell-type Porsche G31 transaxle 4.71 diff
Race suspension including rear coilovers
Bilstein monotube shocks and struts
Reinforced A-arms and trailing arms (see below)
Components to lower car by remounting suspension
Heavy sway bars
15×7″ BBS 3-piece rims
Solid aluminum mounts for engine, transmission, and suspension
Fuel cell
Project information

Internal factory number: 933
Launched on April 26, 1979, as Project 924/80.
US SCCA Racers – 16 total (1980, 92A0490001-92A0490016)
Designed and assembled at Weissach.
Assembly and tuning finished at Warrington, Pennsylvania by Al Holbert.
Jo Hoppen made kits available to competitors to convert their 924s into SCCA racers, valued at $45,000
The cars won the D Production Championship a number of times in the early ’80’s at the hands of experienced Porsche drivers like Doc Bundy. However, the SCCA discontinued running D Prod not long after, and the cars were instantly made obsolete. Except for some cars lucky enough to stay in D Prod trim thanks to running vintage, being in areas where DP was still run locally, or owners wishing to preserve the cars in original form, most DP cars were upgraded to GT3 specs and continue to race in SCCA and/or the Porsche Club of America’s Club Racing program.


https://www.stuttcars.com/porsche-924-scca-1979/

[michaelmount123]

Here is an assembled 933 (D/Prod) that was never raced. Porsche only built the prototype in Germany, then supplied the rest in kit form. Most were assembled by Holbert, but other shops did a few.

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[michaelmount123]

A few more pics:

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[Pefa]

Those 933 cars are just amazing! I would love to build a replica one day but I guess those bodyparts are very hard to get.
I bet you Michael could build a replica engine for such project

Thanks for posting those pics!

// Peder

[michaelmount123]

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[stitch2k1]

Stashu's in Orlando has a 924 shell that was being built as a D production back up car if I remember correctly.

[924slemans]

The 933 has to be one of the best Porsche's ever built....light....1900 lb...the lightest now is 3000 lb...the Cayman........933 is the best handling Porsche ever built....no under steer..... the 911 under steers...the 933 has perfectly planted high speed stability...the 911 wanders around at high speed...the 933 has no snap over steer like a mid engine car...like the Cayman....