1980 Porsche 911 SC built by Promodet Komine Engineering
- 45k original kilometers
- Full rotisserie build by Promodet
- 8300rpm 300hp+ 3.3L short stroke engine
- G50 transmission conversion
- Quantum coilover conversion
- Brembo BBK front and rear
- Incredibly fast car with great street mannered
Vehicle Introduction
RMC Miami is proud to present this excellent example of a properly modified and restored 911 SC “clubsport” racer. Promodet Komine Engineering are the ones responsible for this entire build featuring a combination of in house developed components, and parts from top level tuning companies, all fitted to a rotisserie restored/improved 45k original kilometer 911 SC chassis.
The power weight ratio and feeling of the car is equivalent to a modern GT Porsche. 300kmh+. The short stroke allows for a real 2 stroke feeling that favors a driver who enjoys rpm and footwork. We have gone head to head with 2 991 3RS’s in a top speed battle on closed course for distance. The combination of the Quantum suspension, an extremely tied in chassis, and a set of humungous perfectly balanced and sized big brakes allow for any driver to be inspired with confidence. The carbs SING until 8300 rpm and pulls away from just about anything. This car is a force to be reckoned with.
Chassis & Footwork
Starting with factory sunroof delete 45k kilometer 1980 911 SC Promodet proceeded to strip the car down to a bare shell and build from there. To improve stiffness an 8-point rollcage tied into the A & B pillars was fitted, the rear upper strut mounts were very reinforced, semi-stitch welding and a front strut tower bar was added after all this the entire chassis inside and out was finished in Grand Prix White that is in excellent condition through out. In an effort to drop some weight out of the car carbon doors, carbon hood, IROC RSR style fiberglass bumpers, fiberglass rear deck lid, and full lexan windows except for the windshield.
In place of the factory torsion bars and struts is a full set of Quantum coilovers along with all of the supporting components to convert to coilovers. In addition to the coilover conversion, larger antiroll bars, spherical tie rod ends with bump steer correction spacers, delrin front control arm bushings, and new bushings throughout have all been fitted resulting in an incredibly well tuned suspension set up that feels tight yet compliant. To address braking a set of Brembo f50s and 993 turbo calipers have been fitted to the front and rear respectively, pairing with larger calipers are 2-piece floating rotors at all four corners. Controlling the pressuring going to the brakes is a proper dual master setup with brake balance adjustable from in the cabin. The wheels fitted are a set of 17inch Work Meister S1 2Ps.
Engine & Drivetrain
Promodet is one of the top Porsche tuners in Japan that have been responsible for some extremely rapid street cars and race cars, with that being said this SC balances being a high revving club racer while still retaining great street manners. The engine set up put together by Promodet is a high revving short stroke 3.3L that delivers an experience similar to a two stroke egging you on to find 8300 rpm redline. Pairing with engine is a G50 5 speed which is both more user friendly and a fair bit stronger than a 915, the conversion to the G50 plays sizable role in the good street manner this car exhibits.
With all of this being said this 1980 SC punches well above its weight class and is truly a great example of the high level Porsche tuning that is carried out by Promodet Komine Engineering.
VIN: 91A0132603
45k original KM
Tuning Menu
Service
- Serviced at Stahl Motorsport (7k)
- Serviced at RedLand Perf.
- Compression and leak down checked
- 180psi x6
- 10% x6
Engine
- Short Stroke 3.3L
- 8300rpm redline with 8500rpm limit
- 300hp+
- Crankcase from 3.3 Turbo 930/62 ENG number 6782026
- Crankcase has been polished and modified for knife edged crank
- Knife edged 3.0L Carrera lightweight Crank
- balanced & blueprinted
- mirror polished surface
- 3.0 Carrera Lightweight connecting rod
- Polished mirror finish valve train
- Reinforced crank and connecting rod metal
- Reinforced rod bolt
- Reinforced headstuds
- 930 Turbo oil pump
- Upgraded timing chain tensioner
- Andial Twin Sparkplug 3.2 Carrera cylinder head
- Compression ratio 10.3:1
- Piston IN/EX valve recess polished
- Piston wrist pin lightweight & polished
- IN/EX port enlargement port + polish
- IN/EX valve seat ring (Naprec)
- IN/EX valve guide (Naprec)
- IN/EX lightweight titanium retainer (Naprec)
- IN/EX reinforced valve spring
- Rocker arm polished mirror finish
- 4 journal type cam housing
- 964 320 degree camshaft
- Weber 46 medium IDA
- Twin plug distributor (Bosch RSR type)
- Dual Ignition coil PN/8202
- Dual MSD 6A 16200 ignition box
- Promodet flame/hand bent headers
- Promodet dual mufflers
- Aluminum solid engine mount
- Carrera 3.2 oil cooler
Drivetrain
- Getrag G50 gearbox for 3.2 Carrera
- (GB model 950/01 GB number 74H00750)
- (87Y911 Carrera/Borg Warner Synchromesh)
- transmission Overhauled
- Hydraulic clutch
- Porsche genuine 4.0 LWFW
- OS Giken LSD
- OS Giken Super Single Metal clutch
Footwork & Chassis
- 8 point rollcage welded in
- Coilover conversion: Quantum coilovers + Swift springs
- Heim joint spring plate for coilover conversion
- Front roll center correction
- Spherical tierod ends with bump steer correction spacer
- Upgraded antiroll bar front and rear H&R 23mm
- Spherical adjustable rear antiroll bar end links
- Delrin front control arm bushings
- Reinforcement of rear spring plate mounting
- Rear upper strut mount reinforced
- Aluminum front strut tower bar
- Work Meister S1 2P
- 17x8j
- 17x9j
- Front/Brembo 4-pot caliper (for F50)
- Rear/Brembo 4-pot caliper (for 993 turbo front)
- 360mm 2 piece floating slotted rotor
- Tilton adjustable brake balancer
- Dual master cylinder
- Front & rear hubs refreshed
Exterior
- Front & rear bumper (Fiberglass)
- Front hood (carbon)
- Doors (carbon)
- Rear spoiler (fiberglass)
- Front traction plate (downforce board)
- All windows lexan but windshield
- Front, quarter & rear window seals new
- Vitaloni Sebring side view mirrors
Interior
- Recaro Profi SPG XL driver seat
- Recaro Profi SPG passenger
- Scroth 6-point harness driver & passenger
- Momo 350mm Protitipo
- 10000rpm Promodet rev Tach
- Battery Cut off switch
- Promodet pedals with extended throttle pedal
- Aluminum RS hood prop
VIN: 91A0132603
SERIOUS INQUIRIES CALL/TEXT DANNY (786) 291-3622
- More photos and information available upon request.
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- Can Ship (Insured) Anywhere Worldwide if Needed.
- Located in Miami, Florida 33126
- Financing Available with Approved Credit
- Trades Always Welcomed (UP or DOWN)
