DT: 750-HP Porsche 911 Custom RSR Backdated G50 Coupe by Pat Williams Racing
Vehicle Details
- Year: 1987
- Make: Porsche
- Model: 911 Carrera
- VIN: WP0AB0912HS122241
- Mileage: 2,219
- Transmission: Manual
- Title Status: Clean
- Color: Polo Red
- Seller Type: Dealer
- Location: Florence, AL 35630
- Dealer Fees: None
- Lot #: V-0039899-DT
Commissioned by the world-class builders at Pat Williams Racing, this G50-equipped 1987 Porsche 911 Carrera is the subject of an extensive RSR-style restoration. Finished in Polo Red, this backdated 911 showcases RSR-style bodywork and a custom-built 3.5-liter flat-six engine featuring a twin-plug ignition system, custom Billy Boat GT2-type headers with heat exchangers, cockpit-adjustable dual brake bias and turbo boost systems, Xona turbochargers by TiALSport, and much more. It is said to offer an unprecedented output of up to 750 HP on pump gas and a top-tier driving experience comparable to that of the most expensive 911 restomods. Driven less than 4k miles by its sole owner since the completion of the build on July 1, 2022, this one-of-a-kind Pat Williams Racing backdate is now being offered for auction by its seller out of Alabama accompanied by comprehensive build documentation.
Upon commencement of the restoration, this 911 was professionally refinished in Glasurit single-stage Polo Red, harking back to early 1960s Porsche 911s. The body presents a backdated longnose conversion along with RSR-style bodywork including revised bumpers, widened fenders, a rear ducktail spoiler, and a sunroof delete. The seller adds that a traditional 3.2L Carrera decklid will be included in the sale. It rides on custom Coddington 356-style wheels dressed in Michelin TB15 Course 18/60-15 front and 26/61-15 rear tires. An extra set of racing tires are said to accompany the sale. Paint protection film has been applied and detailed images are provided in the gallery.
Inside, the cabin presents a set of Recaro Sportster GT REC-410GT reclining seats while a MOMO Prototipo steering wheel frames a MoTeC CDL3 dash display/logger, surrounded by European-specification VDO instrumentation. Equipment includes 6-point seatbelts, RS-style door panels, a rear harness bar, and “No. 1 of 1” lettering on the dashboard.
This 911 Carrera’s flat-six engine has been upgraded to a 3.5-liter displacement along with twin Xona turbochargers by TiALSport and a twin plug ignition system, providing up to 750 HP. Power is sent to the rear wheels through a desirable G50 5-speed manual gearbox. Upgrades also include air/water charge air coolers, 6 ITB MoTec ECU, custom Billy Boat GT2-type headers with heat exchangers, a GT3 crank, Elephant Racing 930 Turbo-type brakes, and a cockpit-adjustable dual brake bias and turbo boost systems. A dyno test read 640.7 WHP and 483.7 W lb.-ft of torque at 1.0 bar of boost pressure, and the car is currently set for 1.2 bar producing over 750 HP. A speed of 171.298 mph was achieved on pump gas from a standing start on a half-mile run. The scale weight with a 1/2-full tank is 2,566 lbs. As shown in the photo gallery, all the work performed at Pat Williams Racing is thoroughly invoiced and documented with associated part numbers.
This sale will include a clean title, a traditional 3.2LCarrera decklid, an extra set of racing tires, and full documentation.
The seller would like you to know: “Commissioned by world-class Porsche builder Pat Williams Racing, the PWR RSR/HR dramatically exceeds the performance envelope for the entire Restomod class.”
Comments (0)
Bid in the amount of $221,000
@patwilliams Well, congratulations on the build and the sale.
p.s. I'm not advocating a full cage, especially an improperly installed cage, especially for the street.
What I see in this car is an excellent track day car that retains on-road manners.
Hopefully the buyer will be contacting you about setup for track driving. : )
@flatcrank This has been a long running discussion. The A pillar on the air-cooled 911 is very upright and strong. A roll cage only makes the A pillar closer to your head. A full cage without 6 point belts at the proper tension and with a helmet is a death sentence. This is especially true if the cage is not almost vacuum formed to the A pillar with FIA padding on it. People driving cars with no helmet and no cage padding on the street could sustain a head injury at 25 miles an hour that could kill them. This makes a full cage a bad idea on any street car. This is why all GT3s in the US only came with rear cages.
Bid in the amount of $220,000
Bid in the amount of $200,750
@carp, thank you for the links!
@Barrydow that's a Brey-Krause "trellis" style harness bar. Sufficient for shoulder harnesses on the street, but often used on track despite the safety compromises.
I'd say this much car needs a full cage.
@roddw12 here is the link to the video that is in the background of PWR's website:
https://vimeo.com/716517315
There is additional content on Instagram with more on the way:
https://www.instagram.com/patwilliamsracing/
I see Pat has some brief video clips of this car on track on his homepage. Are there any further videos from this track session available? Would be a great sales aid!
Another vote here for Pat Williams and this car. I've known Pat for many years and own a G50 911 built by him that I will never sell. It just works beautifully on track or on the street. Favorite car that I have ever owned. And I have seen this project from concept to final execution. I have driven this car and it is magnificent. The most interesting part of this build is that it is completely docile and driveable in the city. But when you want to go for it, it's incredibly fast. Driving position is perfect. Brakes are amazing. The braking system that Pat designed is amazing. The number of hours invested in building this car is staggering.
I'm just finishing my second time through the photos and receipts. I've seen lots of builds and owned a few hot-motored 911's. A tweaked 992 and plain jane 993 fill driveway slots these days. Pat takes care of my brother-in-law's turbo and my BIL always shoots me the latest hot rods at the shop.
This car is the one I wish I had always built/bought. Start with 87-89 chassis and keep the G-50 box. Twin turbo but not in the 935 way. Steel widebody backdate. Backdate interior. Old school 911 color. Geared for street. Few cars would have stood out at RR7 last fall, there was so many great 911's there. The event was truly overwhelming. However this one car would have attracted so much appreciation (Alois Ruf's 901 was sweet) and would have a great shot at post 1973 induction to R Gruppe. What a wonderful car. Satisfying just to enjoy the build receipts and pics/videos. I'll stop rambling but this car....
Additional content has been added to the gallery for this listing.
@jonesmechanical We base everything around 93 octane pump fuel. We also know that in certain parts of the U.S. 91 octane is as high as is readily available. Since it is mapped with a pressure offset, when boost climbs , pulse width climbs with it. Thermally the engine is rock solid at this output and we go for longevity over max short term output. Injector sizing etc are for gasoline. To your point E-85 is a lovely motor vehicle fuel. It takes about 38% more of it if memory serves. For the mechanically empathetic this is a good power level. Thank you for the kind words. love those solid Nissan, BMW engines engines. Speaking of over engineered.
As far as the turbo sizing, fuel pump/injector sizing, ignition system, heat exchangers for intake charge, is the overall system pretty much at its capacity as is, if not, what are they designed for horsepower/flow wise?
The way the horsepower is created vs torque is stunning. Torque Curve is ever increasing, and does not let up, which allows horsepower to climb like a modern N/A Porsche. Having a lot of experience with 6 cylinder cars (mostly inline 6 motors of similar displacement in the 3.0-3.3 liter range) the dyno indicates that the turbo chargers could easily achieve double the amount of pressure given a different grade of feul, or a e85 flex fuel setup. Not that I would be interested in doing more, I was just curios how much things were over engineered.
Pat, we have not met, but I know people like you in the Vintage Datsun and BMW world, and I know good engineering when I see it, and to have you here commenting is so helpful to give more insight on this amazing build.
I have known Pat Williams since the mid-90s and he has restored and maintained multiple Porsches for me over the years. Pat is a perfectionist that does what he does because he loves it. Others may do it for a paycheck and the end result is obvious. Every car or engine that Pat builds has some of his soul in it, so rest assured this is the real deal. I watched this car built from the ground up and have been fortunate enough to ride in and drive it. Proper stance, setup, performance, and perfection along with wicked acceleration that will detach the retina. Enjoy!
The 3/4 and 1 mile MPH numbers are it coasting dowm from 175 MPH or so. It was geared for street, and if need be track performance. Gearing is based on what top speed that you desire coupled with HP/Torque/ Aero. Acceleration, tractability/ (traffic) etc are considered over top speed. The car with it's small frontal area and power will probably sail past 200 MPH but at the expense of drivabilty and fun. It is only geared to go in the mid 180s , so it was geared too short for the mile. I knew it would run out of gearing so entered it in the standing 1/2 only. Hope this helps
Very nice work! don't get much better than this and all the fine details! Wow, most people who don't build or renovate cars do not understand what job this is!
Not worthy of these kind words, but thank you. Now for some biased commentary. I humbly submit that the air cooled 911 is the best sports car ever. There is nothing that comes close. They have more performance headroom than anything. Porsche was a fairly small company in this period. The race equipment and street equipment overlapped more than any other manufacturer. The amount of street equipment on a 934,935, 956, 962 etc is shocking. If exposed to these cars long enough one can cherry pick from a plethora of factory proven parts. This car adheres to this fact. It is not filled with parts that are undeveloped. It is fast, easy to drive , docile (if needed) I am proud of it. More humbling is that people trust me with these amazing cars and it is not forgotten. These people become part of my family. PW
Bid in the amount of $125,000
There have been very few porsche cars out there that make we want. Wow. The turbo build, with no traditional rear turbo wing is what makes it for me with the engineering of a water to air setup, that is also packaged so thoughtfully.
Question: what are the mph numbers on the door jamb? I can't make sense of them. Please explain.
Bid in the amount of $100,000
I am local to this car and know the car, the owner, Pat’s work, and most of the other local guys who have PWR cars. This is an exceptional, no-expense-spared build, and a nice departure from the standard archetypal backdate. Beyond a simple long hood, steel fenders and punched up 3.6-3.8. Really unique, and the build quality and detail in person is wild.
Ive been able to get to know Pat pretty well since we met through a Porsche purchase I made back in 2022. Pat doesn't mess around. As a matter of fact I consider him my "Porsche Mentor" Like Carp mentioned below, Pat has so much history and years of working with and driving Porsche cars that it's very special to have one built by him. It's something you'll only understand after driving a car he's built, or spending time at his shop seeing and listening to all the phenomenal knowledge this guy has. Im thankful to know Pat and now own a 911 that he has done some amazing work on for me. His cars are built to be driven and enjoyed. Whomever is the new owner of this car truly is getting a 1 of 1 full of good times to be had behind the wheel. This is one bad ass 911. GLWTS, this is a special one here.
This is a special build that I've been fortunate to have been around throughout its development. I own two cars that Pat has restored and rebuilt the engine and simply can't say enough good things about what comes out of his shop. His history both on the track and in the pits combined with years of working on these cars is special. Owning a 54-year-old car that you can hop in any time and drive across the state to the next rally or event without thinking twice says everything. I'm lucky to be in the club and whoever lands this one will be as well.
Bid in the amount of $90,911
Bid in the amount of $88,888
@peterten The body is all metal. I've uploaded a few more progression photos per your request; will upload more if available during the PCM listing.
Additional content has been added to the gallery for this listing.
Is RSR body work metal, fiberglass, carbon or other? Any more photos documenting the conversion?
Wheels are aluminum and very light.
@ehd911 thanks 👍
With the current power to weight ratio, there’s no reason to be concerned with a couple extra pounds of unsprung weight.
Bid in the amount of $50,000
@ehd911- Well, that make a lot of sense and is very good to know-Thanks a lot
This 911 will do very well GLWTA--Rob
@R-car4Me Wheels are a personal preference; the cited custom Boyd Coddington "356-Look" wheels were made specifically for the PWR RSR per the commissioning client's preference with Pat Williams' consult and the PWR RSR's scale weight (shown in the media gallery) confirms that it's very light @ 2,566lbs (with 1/2 tank of fuel) -- yet alternate spec wheels are easy & relatively inexpensive to alter as the new owner desires.
@Barrydow It's a Brey Krause R-1025 Truss-style harness bar -- this link will provide insight - https://www.ogracing.com/products/brey-krause-truss-style-harness-bar-porsche-911-coupe-74-98
@defenderdelray @defenderdelray The media is all casually shot iPhone photos & videos taken on the PWR RSR's arrival; it came to us clean, thus I proceeded with the photoshoot in lieu of waiting on our detailer -- our media uploaded to PCM is not re-touched, enhanced or embellished in any way, thus the PWR RSR will look as good or better "in person". The driving video was done at the same time (our first experience behind the wheel of this amazing PWR RSR Porsche), also very casually shot via an iPhone (no mount, no gimbal stabilizer, no re-takes, no edits, etc., etc.). The cited steering shake is normal for any G-series 911 providing proper (wonderful) steering wheel road-feedback, allowing you to feel the road (on the very bumpy road we were driving). You would see similar shake on any G-series 911 on this road, especially given the wheel/tire & suspension setup on the PWR RSR that is designed to handle the 750hp with ease, for a wonderful driving experience. You'll notice nil shake with 2 hands on the wheel and nil shake on the smoother sections of the road. The clutch engagements sounds are normal for an iPhone 15 Pro recorded video on a Porsche of this class; our Porsche collection's 100th Singer or even any of our several manual 996 & 997 Porsche GT3 & GT2 RS's will record more mechanical noises in a driving video -- the raw visceral mechanical sensations are what makes this class Porsche exhilarating.
Hi- Just a question on this great looking and wonderful build Porsche- with all the money spent on this build why would anyone put Chrome Steel Rims on this Porsche?
It just doesn't fit and adds un-sprung weight -GLWTA Rob
One question. What purpose do the cross bars in the backseats serve? I haven’t quite seen any like that before
Bid in the amount of $10,000
Thanks for the clarification. The "Turbo" on the back made me think it was a 930 donor for a minute there, but you clearly state it's a Carrera. It was smart to have it color matched. Thanks for the reply.
@RedArcadia Thank you; much appreciated. The extra, included "traditional deck lid" reference in our write-up is referring to a flat 3.2L deck lid, original to the G50 donor, providing a "traditional look", not a 930 tea-tray spoiler and yes, it is paint matched. I've asked PCM admin to correct this in the write-up.
Pat rebuilt the motor and refreshed the transmission of my 993. He does outstanding work. GLWTA.
I have personally driven this car and know Pat Williams and his work. I have a 911 SC with a Pat Williams Racing built motor. It is one of the most amazing cars I have ever had the opportunity to drive and it is docile enough to drive to dinner and so extremely outrageous when you want it to be. The craftmanship is top notch and no expense was spared.
Absolutely love it
Bid in the amount of $2,911
2 items, ...steering is a bit shakey, can you speak to this. and second , what is noise when clutch is engaged. Both on driving video
Awesome build, GLWTA!
Cool car. Did the 930 decklid get pained Polo Red to match the rest of the car?