1973 Porsche 911SR
Lot 453
The ex-"Enno" Bonomelli,1973 Porsche 911S with Special Wishes RS package Chassis no. 9113301169
US$ 300,000 - 350,000
£180,000 - 210,000
amended
Auction Details
1973 Porsche 911SR 1973 Porsche 911SR 1973 Porsche 911SR 1973 Porsche 911SR 1973 Porsche 911SR 1973 Porsche 911SR 1973 Porsche 911SR 1973 Porsche 911SR 1973 Porsche 911SR
Lot Details
The ex-"Enno" Bonomelli
1973 Porsche 911S with Special Wishes RS package
Chassis no. 9113301169
* 2.7-liter flat six-cylinder
* 5-speed manual transmission
* Extensive list of factory performance options
* Italian delivery example
* Originally prepared to Group 3 spec.
* Factory 'Hot Rod'
* Modern safety improvements

Porsche has always been willing to build cars to customer's individual preferences; the only limit being the size of the customer's checkbook. Those orders are directed to the factory's Sonderwünsch, or "Special Wishes" department, and there, a newly-constructed tub will be delivered with a list of whatever items the buyer has in mind, from "mild to wild".

Eugenio "Enno" Bonomelli was no stranger to Porsche; he was a frequent entrant in the European Hillclimb Championship during the late 1960s and early 1970s in his 911S Coupe. He also shared a Porsche 910 at the 1971 Österreichring 1000km, placing fifth overall and first in class with Vincenzo Cazzago, and later on would do well with an RSR in the European GT chase.

In early 1973, Bonomelli ordered a new Porsche 911S coupe from Viscardo Automobili of Bologna on behalf of the Scuderia Centro Sud racing team. Bonomelli intended to race this car in the FIA's Group 3, and the Sonderwünsch took up the task. This was an expensive exercise; a few years ago, a Southern California dealer who offered this car noted that the base price of a new, base 1973 911S coupe delivered to Bologna was just over 9.7 million Lira, about US$18,000 at the 1973 exchange rate. The delivered price of Enno's race-modified car was an astonishing 15.8 million Lira, or about US$29,000, including factory race prep and pre-delivery testing. This was more costly than a new factory-built Group 4 911 Carrera RSR 2.8.

While 911 330 1169 is currently painted Gulf Blue, its original color was Light Ivory, with the interior trimmed in lightweight black vinyl. The factory-issued Certificate of Authenticity lists the original 2.4 liter Type 911/53 engine case as number *663 0892*, with Type 915/02 five-speed transaxle number 732 5985. Other Group 3 components included a limited-slip differential and RS-spec brakes. The body received RS fender flares. There was an FIA-approved rollover bar, an 88-liter fuel tank, a factory competition exhaust system, among other Group 3 items.

It isn't known how long Bonomelli kept the car, but it is believed that he raced it extensively. It was imported to the U.S. in 2009. It is currently fitted with a 2.7-liter engine, fully rebuilt with factory lightweight connecting rods, RS pistons and cylinders, and high-butterfly-type Bosch mechanical fuel injection. The Bosch racing injection pump was overhauled. The engine is blue-printed and internals were polished. The cylinder heads were rebuilt with new guides, valves, springs, and titanium valve spring retainers. There is a new oil pump and two new fuel pumps. The oiling system, with its RSR front oil cooler, is fully protected by braided wire and quick-release fittings. The oil catch tank is factory supplied. The engine mounts are titanium. The transmission was rebuilt with new, longer, 4th and 5th gears. All new bearings and other necessary parts were replaced, and a 935 shift lever and housing from Rennline installed.

The rear suspension has been upgraded with drilled rear torsion bars, a hollow rear anti-roll bar in reinforced consoles, poly-bronze control arm and spring-plate bearings, sealed mono-ball joints for the trailing arms and camber plates, and adjustable rear camber. The front suspension has received low-friction control-arm mounts, de-cambered ball joints, and an adjustable bump-steer kit. Brakes are from a 3.3 Turbo with Turbo S calipers and racing pads. Minilite alloy racing wheels are fitted, 7-inch wide in front, 8-inch wide in the rear.

After a full media blasting, the tub was resprayed 12 coats of Gulf Blue paint. All rubber seals and gaskets on the body were replaced. The front hood is aluminum, and held down by factory RS-style rubber straps. The lightweight front and rear 911R turn signal units are original. Inside, the rollbar is factory original. The wiring harness, all electrical cables, and relays are new. There is a new RS steering wheel, and the seats are factory-style Recaros in black leather. Racing harnesses are by Schroth, and valid for the next several years, according to the vendor. Elephant Racing supplied an alloy battery box, alloy floorboards and pedals. All instruments were refurbished. A pair of large Cibie driving lamps was installed using through-the-horn grille hardware. The vendor claims that with a rev limit of 7,900 rpm, the car is capable of a 0-60 time of 4.7 seconds and a top speed of 177 mph.

The 1973 911S is the last, and in the view of many, the best of the early "short-hood" 911s, the peak of the company's light-weight sports chassis. This rare and meticulously-prepared European "Special Wishes" 1973 911S coupe, fitted with a very strong engine and modern safety equipment, offers a new owner a potent and thrilling track weapon that is both very attractive and very fast.

Saleroom notices

  • The race history of this car is being investigated at the time of cataloging but it is understood to have competed at ACI circuit events and hillclimbs in Italy in the period 1974-1975, driven by Bonomelli, Zordan and Vincenzo Cazzago ("Pooky"). Please note that the engine number for this vehicle is 6330892.
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