Interscope „Indy“
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Interscope „Indy“

Racing car, 1980

Highlights

  • The sole surviving Porsche “940” Indycar
  • Original chassis, original engine and original gearbox
  • Completely restored to running condition – finished in 2020

1980 Porsche Interscope Indycar IP-1 – Engine #5

One of three Interscope chassis built for the first Porsche Indycar Project

Background: Porsche and the Indianapolis Idea

By 1979 Porsche had already celebrated 20 years of international success in sports car racing – from the first Targa Florio win in 1959 to numerous victories at Le Mans, Daytona, Sebring and other major events. At this point, Porsche’s management decided to expand its North American racing activities and take on the ultimate challenge: The Indianapolis 500.

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The vehicle in detail

With recent Le Mans wins (1976, 1977, 1979) the company had a proven, powerful and reliable engine. USAC regulations, however, required single-turbo engines running on pure methanol.

Manfred Jantke was named project leader, supported by veteran race engine engineer Valentin Schäffer. Interscope Racing, an experienced USAC team, was chosen as chassis partner, and Danny Ongais was announced as driver.

Development of the IP-1

The new aluminium monocoque was designed in Santa Ana, California by Roman Slobodinski. Porsche adapted the engine to 2.65 liters, used a four-speed gearbox, and set boost pressure according to regulations. Successful tests followed in Ontario in late 1979.
Rumors of Porsche’s superior pace led USAC to cap boost pressure for six-cylinder engines at the same level as V8s (48 inHg). This rendered the Porsche motor uncompetitive, requiring an all-new short-stroke design. In September 1980, Porsche AG canceled the project.
Two chassis were later fitted with Cosworth engines by Interscope.

The Offered Car
The example offered here was discovered in California in the early 2000s, still in Porsche specification but without its original engine. After years of searching, the owner acquired one of the rare 935/72 Indycar engines.
A meticulous restoration was completed in 2020, returning the car to running order and as-close-to-original specification as possible.

This Interscope IP-1 is the only surviving Porsche Indycar in original spec – a unique and important piece of Porsche’s North American racing history.

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Specifications

Year of construction: 1980
Model: Interscope „Indy“
Body: Racing car
Series: Specialities
Power: 630 HP
Cylinder capacity: 2.6 Liter
Steering: left
Transmission: Manual
Drive: Rear drive
Fuel: Gasoline
Interior color: Black
Exterior color: White
Condition: Fully restored
New / used: Used car
Ready to drive: yes
Car location: DEGermany

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