1969 Porsche 912 Coupe
by Kurt Zimmerman and Andial

Overview

This 1969 Porsche 912 was acquired by Kurt Zimmerman in 1980 and developed over the next three decades into a unique, competition-focused Porsche. Zimmerman's career included positions with Porsche dealerships in Southern California before joining John von Neumann Porsche-Audi in Los Angeles, where he worked alongside Richie Ginther. Inspired by Ginther's 1971 911 S/T and the preparation philosophies that shaped his approach, Zimmerman set out to build a lightweight Porsche of his own using genuine factory components from multiple generations of Porsche competition cars.

An exceptionally original, rust-free 1969 Porsche 912 finished in Polo Red, with portions of its original paint still preserved to this day, served as the foundation for the project. Rather than replicating Ginther's 911 S/T outright, the car evolved over approximately thirty years as Zimmerman's ideas and engineering continued to develop. Genuine Porsche factory competition components from multiple generations of Porsche Motorsport were carefully selected and incorporated throughout the build, including factory 906 forged rocker arms and aluminum timing sprockets, 911R lightweight body panels produced from factory molds, factory RSR twin-plug ignition and slide-valve induction components, a 935 front oil tank and chassis cross-bracing system, factory 930 braking components, and 962 titanium engine hardware, among countless other details. Each component was selected with a specific engineering objective in mind, from reducing weight and improving cooling to increasing strength and optimizing weight distribution. The result is a remarkably cohesive and thoughtfully engineered automobile.

Power comes from an Andial-built 3.5-liter twin-plug flat-six featuring slide-valve induction and producing more than 300 horsepower. Extensive use of aluminum, magnesium, titanium, fiberglass, and other lightweight materials contributes to an approximate curb weight of just 1,815 pounds, creating an exceptionally responsive driver's car unlike virtually any other early Porsche.

Accompanying the car is a comprehensive history file containing decades of invoices, engineering notes, build specifications, period documentation, and supporting records chronicling its development. The combination of genuine Porsche factory competition components, meticulous engineering, and extensive documentation makes this an exceptional opportunity for the discerning collector seeking a truly unique early Porsche.

Please contact us for pricing, additional photographs, or to learn more about this remarkable one-of-one Porsche.

Technical Specifications

Chassis

• 1969 Karmann-built long-wheelbase 912 chassis (VIN 129020308), selected as the lightest production long-body platform available from Porsche.

• Reinforced rear shock mounting area for RSR coil-over suspension.

• Front battery boxes removed and enclosed to improve airflow to the oil coolers and front brakes.

• Dual front oil coolers and mounting system integrated.

• Factory-style 935 front chassis cross brace incorporated.

• 935 front oil tank and mounting system installed.

• Fuel and oil filters relocated forward for improved weight distribution.

• Enhanced 935-style roll cage integrated into the cockpit.

• Aluminum rear roll cage extensions incorporated into the engine compartment.

• Rain tray removed.

• Lap belt mounting points repositioned.

• Custom front-mounted battery enclosure fabricated.

• Full titanium front skid plate fabricated.

• Camber degree plates integrated into the front strut towers.

• Rear oil tank opening deleted.

• Solid aluminum engine and transmission mounts.

• Engine electronics relocated from the engine compartment to the rear interior tray.

• Integrated aluminum and stainless-steel oil lines.

• Front and rear tow loops.

• Front and rear jack pads.

• Custom fuel-safe fuel cell.

• Twin fuse boxes relocated to the front luggage compartment.

• Titanium fasteners used extensively throughout.

• Undercarriage stripped of factory undercoating and refinished using POR-15 and Sterling two-part polyurethane coating.

Body

• 911R fiberglass front hood produced from factory molds.

• Custom external aluminum hood hinges.

• RSR hood straps.

• 911R aluminum engine lid.

• Lightweight engine lid hinges.

• RSR rain shields protecting intake stacks.

• 911R fiberglass doors produced from factory molds.

• 935 epoxy door handles.

• Aluminum door hinges.

• Acrylic 911R door windows.

• Lightweight 911R interior door handles.

• Flush-mounted acrylic windshield.

• Flush-mounted acrylic rear window.

• Flush-mounted acrylic quarter windows.

• Aluminum door strikers.

• Aluminum replacements for rear J-tubes.

• 911R fiberglass front bumper.

• Custom front fog light openings.

• Custom cooling air inlet grilles.

• Removable front spoiler.

• Rally-style headlight retaining rings.

• French yellow headlamp lenses.

• Acrylic headlamp covers.

• 911R front signal lights.

• 911R rear signal lights.

• 911R tail lamps.

• Lightweight single-wiper system.

• Custom fiberglass rear bumper incorporating exhaust megaphone openings.

• Exterior electrical cut-off switch.

• Hella 181 auxiliary driving lamps with Cibie covers.

• Fiberglass front fenders produced from factory molds.

• Titanium exterior fasteners throughout.

• Marken Weltmeister engine compartment support.

• ANDIAL/Porsche crest firewall reinforcement.

• Porsche 356 Durant mirror with custom extension base.

Engine

General Specification

• Andial-built 3.5-liter twin-plug flat-six.

• Over 300 horsepower.

• Approximately 8,000 RPM operating range.

• Slide-valve fuel injection.

• Road-capable air filtration system.

Bottom End

• 930/21 aluminum crankcase.

• Modified crankcase for GT3 oil pump.

• Factory 962 titanium case studs.

• Carrillo connecting rods.

• Carrera crankshaft.

• 100mm Mahle pistons.

• 100mm Mahle cylinders.

• Lightened and strengthened wrist pins.

• Lightened flywheel.

• Factory magnesium chain housings.

• Titanium fasteners used extensively.

Valve Train

• Factory 906 forged rocker arms.

• Factory 906 aluminum timing sprockets.

• Factory 906 center-oiling camshafts.

• Factory 911SC cylinder heads ported for RSR slide-valve induction.

• Titanium valve spring retainers.

• Andial valve springs.

Induction & Ignition

• Factory RSR slide-valve induction.

• Factory RSR twin-plug distributor.

• Factory RSR injection lines.

• Bosch RSR injection pump.

• Custom ITG air cleaners.

• Cold-start injector system integrated into intake stacks.

Lubrication & Cooling

• GT3 oil pump conversion.

• 935 front oil tank.

• Dual front oil coolers.

• Integrated aluminum and stainless oil lines.

Exhaust

• Fiberglass RSR engine shrouding.

• Factory 917 exhaust bracket and configuration.

• RSR header system with megaphones.

Transmission / Wheels / Brakes / Suspension

Transmission

• Magnesium 915/912-E transmission.

• Quaife limited-slip differential.

• Factory RSR transmission oil sprinkler system.

• 7:31 ZF ring and pinion.

• Factory hill-climb gear ratios.

Wheels

• Factory 7-inch 911R front wheels.

• Custom deep 8-inch forged Fuchs rear wheels.

• Aluminum wheel spacers front and rear.

Brakes

• Factory 930 front brake calipers.

• Factory 930 drilled front rotors.

• Special factory 930 rear brake calipers adapted for lightweight early aluminum trailing arms.

• Factory drilled rear rotors.

Front Suspension

• 935 chrome-moly A-arms.

• Eibach custom coil-over springs.

• Bilstein dampers.

• Delrin suspension bushings.

• Factory anti-roll bar.

• Titanium fasteners throughout.

Rear Suspension

• Factory 935 coil-over springs.

• Bilstein coil-over dampers.

• Factory anti-roll bar.

• Custom drop links.

• Early aluminum trailing arms.

• ERP heim-joint spring plates.

• Titanium fasteners throughout.

Interior

• RS lightweight seats with dual adjusters.

• Enhanced Sabelt FIA harnesses.

• Custom titanium clutch pedal.

• Custom titanium throttle pedal.

• Custom titanium/steel brake pedal.

• Aluminum footplates.

• Microfiber-covered fiberglass dashboard.

• Aluminum-finished dashboard.

• 200 MPH electronic speedometer.

• 10,000 RPM factory tachometer.

• Integrated warning light system.

• Standard fuel and oil gauges.

• Dashboard-mounted electrical cut-off switch.

• Auxiliary oil cooler fan switch.

• 954 factory short-shift assembly.

• Factory 915 shift tower.

• Aluminum-mounted fire extinguisher.

• Manual cold-start switch.

• Custom secured rubber floor mats.

• Camera mount integrated into roll bar.

• Drilled lightweight seat base plates.

• Twin-plug ignition isolation switches.

• Flat 1969 Momo Prototipo steering wheel.

• Early solid steering hub.

• Interior stripped of factory undercoating.

• Finished with Sterling epoxy primer and Sterling two-part polyurethane topcoat.

• Aluminum-finish dashboard with red and black competition-inspired interior color scheme.

Inquire via CabiglioGarage@gmail.com