OVERVIEW
Of all the many racing variants of Porsche’s venerable 911, starting with the 911R of 1967, the RSR evokes possibly the strongest reaction from marque enthusiasts today. Debuting in 1973 in 2.8-liter form, the RSR was Porsche’s entry into countless sports car races worldwide.

With the introduction of the G-bodied 911 for the 1974 model year, Porsche introduced a new RSR, this time with a 3-liter flat six and massive center-lock wheels covered in exaggerated fender flares. This ultimate expression of the normally aspirated 911 of the 1970s was built through 1976 and was a dominant force in endurance racing for many years.

The desirability of real RSRs have skyrocketed, and enthusiasm for the model shows no bounds. While the values of authentic examples have put them out of reach of many enthusiasts, replicating the core principles of the RSR has never been easier, and replicas such the one offered here are an increasingly popular choice for vintage racing enthusiasts.

Built as an homage to the original, this RSR was based on a 1976 911 tub, chassis number 9116200111. This is the 37th example built by the renowned John James Racing in Arizona, which has become a prolific source for grid-leading RSR-spec racers. The stock body shell was seam-welded and received all the appropriate modifications for competition use. It has been fitted with a full roll cage made from 1.5” DOM tubing, utilizing NASCAR-style door protection. The front bodywork, as well as the rear flares, tail and bumper, are all done in lightweight fiberglass, just as the original, and the windows are made from Lexan. Under the front hood is an aluminum fuel cell and oil tank, and the front oil cooler is installed in the middle of the front bumper.

The engine is a 3.4-liter unit built on a 3.0-liter aluminum engine case that has been fitted with a forged stroker crankshaft, Pauter Racing connecting rods and J&E forged pistons. The cylinder heads were ported and smoothed, and then converted to twin-plug ignition. John James Racing utilizes their own camshaft grind from Web Designs, with a useable powerband from 3,500-7,000 rpm, and a redline of 8,000 rpm. 50mm PMO carburetors handle fueling, while a J&B twin-plug distributor and dual MSD boxes are used for ignition

The type-915 gearbox was rebuilt with a shorter 5th gear, Wavetrack LSD differential, and new syncros and sliders. A Wevo billet shifter was installed to ensure durability and provide accurate gear changes.

Eschewing the torsion bar suspension from the standard 911, this car utilizes Bilstein coil-over racing dampers along with heim-jointed arms and Tarret Racing sway bars. Adjustable rear camber boxes were utilized, allowing for accurate alignment settings. Braking is handled by Brembo 4-piston calipers clamping iron rotors with aluminum hats and activated by twin Tilton master cylinders.

Build Details:

Tub: (Time Period Correct for years 1974-1977)

Totally stripped to bare metal. (1976 Chassis #037)

Seam Welded in critical suspension areas.

Removed unnecessary brackets, tabs, and sheet metal.

Full point to point roll cage built with NASCAR type door protection using 1.5 DOM (1.25 wall) tubing.

Sunroof was replaced with stripped light weight style roof.

Welded front belly pan installed.

Suspension:

Front:

Bilstein coil over front struts. Raised Spindles 19-27mm.

Eibach springs 2.25 front 325-500lbs.

Front 930/911 Aluminum hubs.

996 Brembo calipers ducted by 2.5 inch ducting to calipers.

Ceramic impregnated pads (size is time period correct).

Tarett-Hollow Fully adjustable center sway bars (Factory RSR style).

Heim 935 bushings.

Mono-ball adjustable strut mounts.

Dual master with adjustable bias bar).

935 Lower front A arms

Rear:

Time period correct trailing arms.

Rear adjustable camber boxes

Tarett-Hollow Fully adjustable center sway bars (Factory RSR style).

All new bearing sets (rear arm).

Factory CV joints and axels

Rear 996 brake calipers (time period correct)

Vented rotors.

Monoball style rear suspension pickups with adjustable camber boxes.

Rear Bilstein coil over shocks.

Rear Eibach springs

Engine:

3.4 Twin Plug engine with matching heads and case.

Eibach custom valve springs.

Heads ported and matched.

Forged 3.2 offset grind crank.

Pauter rods with ARP bolts.

12.5-1 J&E custom pistons.

WEB design Cams.

1 ¾ Custom headers (3 into 2 into 1).

JNB Twin Plug Distributor.

Large oil cooler with prescreen and oil temp thermostat (depending on environment).

50 PMO carburetors (or PMO’s).

All oil and fuel lines are steel braided with AN fittings.

Horsepower will be roughly +/-345 bhp @7000 rpm and approximately 60-80 hours is expected before an engine refresh is necessary.

Body:

Body panels of original molds from ‘70s Vasek-Polak Porsche.

IMSA front spoiler and original whale tail for GTO Group.

Doors are cut and lightened

DOT front windshield with Lexan sides and rear.

Gear Box:

915 Gearbox

Rebuilt to factory specs (gears 1-4 are stock with a shorter 5th).

Limited Slip quaife (or true LSD option).

Fresh syncros, dog rings, and sliders.

WEVO billet shifter

Fuel Cell:

ATL 15 gallon aluminum case with sending units and duel pickups (all steel braided line with AN fittings).

Cockpit:

MOMO steering wheel with quick-release.

Standard gauges with Autometer sport comp 2 tach.

SCCA master cut of switch.

Full Fire-Sense 4L fire suppression system with pull cable. --Refresh 2023

Cobra Monaco S race seat (FIA and SCCA approved).

Wheels and Tires:

JJR 917 Wheels (Front: 11.5x16/Rear: 14x16).

Goodyear Slicks (Front: 23.5x10.5x16/Rear: 25.0x14.0x16)

This fantastic 911 has seen use in just three race weekends, all in current ownership. An hour meter mounted in the front trunk reads just 7.7 hours of use. It is accompanied by a racing logbook and a specification sheet from John James Racing. Ready to be enjoyed on-track, this well-maintained and little-used RSR welcomes your inspection.

Please contact Jason at +1-206-355-7727 or Hans at +1-425-417-5877 for more information on this vehicle.