DT: 1978 Porsche 911SC RSR-Style Backdate 2.8L Twin-Plug
Vehicle Details
- Year: 1978
- Make: Porsche
- Model: 911 SC
- VIN: 9118301840
- Mileage: 380
- Transmission: Manual
- Title Status: Branded
- Color: Golf Blue
- Seller Type: Private Party
- Location: Scottsdale, AZ 85268
- Lot #: V-0043561-DT
This 1978 Porsche 911SC has undergone extensive refurbishment and modification by Backyard Legends of Concord, North Carolina, evoking the style of a 911 RSR. Finished in Golf Blue over a tan leatherette upholstery, this example is powered by a twin-plug 2.8-liter flat-six engine paired with a 5-speed manual transmission and a limited-slip differential. Modifications include backdated exterior elements, fiberglass RSR-style front body components, steel rear fender flares, individual throttle body fuel injection, a coil-on-plug ignition system, custom exhaust components, adjustable Bilstein coilovers, 15" Fuchs-style wheels, Braum seats, RS-style door panels, a MOMO steering wheel, a WEVO shifter, and more. Benefitting from over $52k in work completed by Patrick Motorsports as of 2024, this modified 911SC is now being offered for auction by its seller out of Arizona with approximately 380 miles driven since completion.
In 2018, this 911SC underwent a refinish in Golf Blue, accompanied by the installation of a sunroof filler panel and a fiberglass backdated long hood nose, RSR-style front fenders, RSR-style bumpers, and a ducktail rear decklid. Additional features include yellow Bosch H4 headlights with chrome trim rings, steel rear fender flares, black Carrera and Porsche graphics, a left-side mirror, rubber hood and decklid tie-downs, black horn grilles, and twin central exhaust outlets. Under current ownership, the vehicle received repair and touch-up of the front bumper cover, modification of the rear bumper for exhaust system clearance, removal and reinstallation of the windshield, re-keying of the door lock cylinders, repair of the left-rear window mechanism, and replacement of the door check straps and fuel door release cable. It rides on aftermarket 15" Maxilite Fuchs-style wheels wrapped in Pirelli Cinturato P7 tires sized 205/50 front and 225/50 rear, respectively. The seller notes minor rock chips on the rear flares and underside of the front bumper, detailed images are provided in the gallery.
The cabin underwent modifications featuring Braum bucket seats upholstered in tan leatherette, complemented by RS-style door panels and rear side panels in matching tones. Equipment includes a leather-wrapped MOMO Prototip steering wheel, WEVO shifter, front lap belts, an Alcantara-wrapped dashboard, and a rear seat-delete insert along with a rebuilt speedometer, clock, and instrumentation. Current ownership actions encompassed shortening the lap belts, securing the MoTeC ECU to the right floor, and replacing the toe board, pedal pads, pedal stop bushings, and door check straps. The ignition switch was also replaced, although the seller notes an inoperative heater and the absence of sun visors.
Bored out to 2.8 liters from a 2.7-liter 1972 Porshce 911S case, the twin-plug flat-six engine delivers power to the rear wheels through a 5-speed 915 manual transmission and a limited-slip differential. Reportedly built by Bowman Vintage Restoration of Hickory, North Carolina, the engine boasts 10:1 compression pistons, a polished and balanced crankshaft from Custom Crankshaft Repair, Mahle cylinders, JB ported cylinder heads, a custom Web Cam Inc. camshaft, and Aasco 9mm valve springs and titanium retainers. Additional equipment includes Jenvey Dynamics individual throttle-body fuel injection, MoTeC M84 engine management, LS coil packs with custom brackets and Clewett wires, custom stainless-steel headers, and Magnaflow mufflers. Recent maintenance encompasses securing the fresh air ducts, repairing the wiring, revising the ECU tuning and throttle linkage, adding an oxygen sensor to the exhaust system, relocating the oil cooler, and replacing the fuel tank, alternator fan, battery mounting hardware, fuel lines, and oil cooler hoses. Previous modifications, undertaken before current ownership, included fitting adjustable Bilstein coilovers, Tarett Engineering drop links, adjustable torsion bars, and braided stainless-steel brake hoses. Work performed after the owner's acquisition involved fitting 964 "big piston" front and rear calipers, wheel spacers, replacement Eibach springs, a 22mm hollow front anti-sway bar, and RSR-specification front strut mounts, as well as reinstalling assorted suspension components and replacing the rear brake rotors, suspension hardware, front control arms, rear trailing arms, and steering rack boots.
This sale will include the owner’s manuals, the original set of wheels, and a branded title (rebuilt).
The seller would like you to know: “Great car with tons of money just spent.”
Comments (56)
@bbroetsky your choice is understandable and you're right its personal preference, the car is fabulous
@Scalemotorsport I thought it matched well with the window bezels and wheel lips. But obviously all personal preference.
. . . almost perfect, that rear deck engine grill needs to be black, the silver is too harsh and just doesn't fit with the rest of the car
@Scalemotorsport thank you for the kind words. No problems, the car is available for viewings, test drives and PPI's.
Not sure what the problem is, this car was on a competitive website and didn't sell there either. Frankly its worth 130k, I'm surprised it hasn't reach higher, its beautiful!
@gt3suds coming in swinging.
Bid in the amount of $98,000
Bid in the amount of $91,000
Bid in the amount of $90,000
Bid in the amount of $89,000
Bid in the amount of $88,000
Bid in the amount of $87,000
Bid in the amount of $86,000
Bid in the amount of $85,000
Bid in the amount of $84,000
Bid in the amount of $83,000
Bid in the amount of $82,000
Bid in the amount of $80,500
Bid in the amount of $77,000
Bid in the amount of $76,000
Bid in the amount of $75,000
Down to the final 5 mins. Good luck to all active bidders. I'll be able to answer any last minute questions anyone has.
Bid in the amount of $71,000
Bid in the amount of $70,000
Bid in the amount of $67,911
Bid in the amount of $67,000
@Whatever123 sorry I missed the dash comment. The dash is covered in what I'd call Mouse Hair. Similar to what you'd see on the Ferrari F40.
@Jet2jeff2 it had 944 brakes on it when it arrived and have since all been switched four to 964 calipers that stop great.
@Jet2jeff2 those are in the gallery from photos 95 to 123. P Car market photos are a little confusing, scroll to the bottom to get to all the photos.
@Whatever123 I believe that is a rev limiter. I agree, I have a few spare hood crest decals from my 991.1 GT3 RS. I will include those with the sale.
Great build.
I know you gotta stop build somewhere-
I would only add the TRE through hood filler and 917/930 brakes.
Sorty. I now see all I need to see.
Can you post pictures of bottom & underneath the car ?
Is the dash cover to hide sins? Or, is that correct for a backdate? Also, can you confirm previous post that at 6k it is a rev limiter kicking in? Beautiful car. I think a porsche hood crest decal would look awesome.
@bbroetsky as it should be!
Bid in the amount of $66,666
@bortjones no AC, Heat or Radio.
Does this car have air conditioning?
@spring2010 I believe that is the rev limiter. The tach shows up to 10k but has no red line anywhere on the current tach. So I'm assuming it's just a generic tach that was installed
@WReiter started the car yesterday and it looks like it idles right at the 900rpm mark.
I looked through the receipts and I have no record of a dyno graph anywhere.
Great build! Interested bidder here. 36 seconds into the driving video, the engine starts cutting out right at 6000 rpm. Is this a misfire or the rev limiter? If it’s the limiter why is it set at just 6000rpm? Thank for for proving some insight
Really cool hotrod. 2 questions:
1) At what rpm does she idle? Rich?
2) Do you have any numbers for when it was dyno tuned? I imagine that engine setup had to get a tune to dial it in.
@Craiguf no issues. I currently have Collector Car Insurance through Gingerbread Insurance and the underwriter is Philadelphia Insurance for all of my cars.
PS: I've heard a large majority of Singers are actually rebuilt titles too.
Any issues insuring it with a branded title? Beautiful color
@cmillermorris very minor oil leak when it sits in the same spot for too long (what air cooled engine doesn't) but nothing major that needs to be addressed. I took photos on the few stone chips on the rear fender flares since the car does not have any PPF installed. As far as issues, none that I'm aware of since Patrick Motorsports took care of them all.
Bid in the amount of $65,911
Bid in the amount of $65,000
I am a bidder on this beautiful 911. Any leaks? Any concerns or issues that need to be resolved?
Bid in the amount of $52,621
@chuckent are you referring to the hood latch area? The car only uses the rubber straps now front/ rear. No latches
@chuckent correct. Thank you
@BoxsterGT All body panels, bumpers, duck tail made by TRW in Van Nuys,CA. Very high quality and strength. The rear flares are steel though.
was the front latch piece replaced with a backdate welded in piece or just modified for use with a long hood?
fiberglass front, steel rear flares
Please tell us the fender flares are steel and not fiberglass.
Hey guys welcome to my auction for this beautiful 1978 911 SC backdate. As you can see from the photos we're a big family of Porsche Enthusiast (14 total between us). This car was just completely gone through by the world renown Patrick Motorsports of Phoenix Arizona. To ensure the car is in perfect operating order with no issues. A total of $52,621.03 was spent with proof of receipts. If you have any questions or would like additional photos/ videos please don't hesitate to reach out.