Doc’s 1989 Porsche 930 M505 Slantnose Cabriolet Walkaround & Drive

This car was sold in 2019 at Sotheby’s Amelia Island Auction
This vehicle was ordered 11/20/1988 and purchased through Carousel motors in Iowa City by Jack Frost MD. It was picked up European delivery on 06/05/1989 and had about 3500 miles put on it as an overseas delivery. After that it was driven fairly infrequently over the years to the present mileage of 5923.
Andrew Frost purchased this car from his father’s estate/Automotive dealership called Action Performance 12/27/2014 with 5340 miles on the odometer. He respectfully drove the car on beautiful days about 100 miles per year.
In his bid to find the perfect Porsche (This was only Porsche that he would ever own), he waited patiently to be able to order what he felt was the most significant Porsche of the era. The rare and exotic nature of the WERKs Slantnose production caught his fancy. As the ardent “gearhead” he wisely optioned this traditional Guards Red Turbo 911 Cabriolet with the G50 5 speed transmission. The M505 Slantnose option itself cost $29,555.00! Needless to say, this combination of desirable options makes this particular Porsche an exceptionally rare example within an infinitesimal number of rare examples.
The exact number of 1989 M505, 930 G50 Cabriolets is largely speculative…. mostly because the numbers vary from source to source. We can probably agree that the likelihood of seeing another one of this caliber for sale soon….is probably pretty slim. Multiple sources place the number at less than 28 units. Note: On the display info sheet found within the car….Dr Jack Frost himself states that it is only one of 22 and believed to be the 3rd last production cabriolet with the USA EPA-DOT approved slantnose option.
Provenance:
Dr Frost was very good at collecting documents and we are fortunate to have some impressive provenance including his personal correspondence with the Porsche factory concerning his purchase and European delivery. Of Course, included with the purchase will be numerous documents (Including the Certificate of Authenticity) and even a picture from their trip.
Originality and Revitalization:
At the time of the current owner’s purchase (Andrew) in late 2014, the car had not been significantly driven since the time of his father’s death in 2007. Basically, it had sat idle for almost 1 decade in Jacks personal climate/humidity-controlled warehouse. His oldest brother who was the caretaker of the collection had recently passed away so we were unsure exactly when the last time the car had been run. As a mode of precaution, Andrew elected to allow experts revive the car and made no attempts to even start the car. After getting in line for about 1 year, the Porsche was transported to StallTek in Wellman Iowa (they offer premiere restoration of older Porsche vehicles and are well respected within the Porsche community). It was under their considerable expertise that the car was inspected and “revived”.
They were treated to a surprise when the car first went on the lift and were pleased to find the inspection markings still intact. Amazingly, the car still has significant coverage of Cosmoline on the undercarriage where it was applied prior to shipping to the United States. Simply a testament of how original and gently this car was used.
The car is absolutely original with the following exceptions. There have been no accidents, Damage or Flaws other than that listed below.
Paint: There were a few very small paint chips that Stalltek expertly repaired on the hood and rear flares. As I recall, these occurred during the European trip during the leg through Scotland.
NOTE: Recently during an inspection of the paint, we have determined that the paint on the hood and front quarters is thicker than the rest of the car...since the car has not been in any accidents or had any restoration of the paint since Dad picked up the car (and still has the repaired hood chip that he incurred during the European trip)....we can only assume that it was repainted at the factory for some unknown reason.
Tires: The car now wears brand new set of Toyo Proxes R888s (roughly 3 years old at the time of this writing). The original set of tires is included with the sale should the new owner prefer a period set of tires on the car.
Modifications: There has been a small but significant (and easily reversible) modification made to the fuse system. Basically, a modern fuse hack has been applied to the fuses that run the fuel pumps. This has made startups considerably 100% reliable in the humid Iowa weather.
Starting Module: For the sake of reliability, the original CDI ignition module was rebuilt to factory specs.
Any questions about the car’s “revival” can be discussed with the staff of StallTek. I am sure that they supply ample details.

[@michaelreed8540]

Absolutely beautiful Slantnose 930, Thank you for the video

[@markswishereatsstuff2500]

See a lot of components in my 1990 964 911. Dash, seats, engine. My steering wheel is different. Has an airbag. A-pillars look the same.

[@Springtailsolutions]

I would agree....I bet Porsche dips into the parts bin often. Not that it is a bad thing, I love it when parts cross over