Singer is back with a new engine project in conjunction with Cosworth. The new normally aspirated flat-six is aimed at broadenging out the power and torque curves for better driveability, always a good thing.No prices were listed, but if you have to ask...Singer reimagines some splendid Porsches, doesn’t it?You know Singer, the boutique restoration shop in Southern California that takes 1990-1994-era 964-platformed 911s, strips them down to the bare metal, and builds them back up as something entirely new, and better. The company has been working with eminent engine maker Cosworth since 2011 to do for the flat-six what Singer does for the rest of the car. Back then, it started the Cosworth collaboration with three new variants of the classic air-cooled Porsche flat-six: a 300-hp, 3.6-liter ‘Touring’ model; a 380-hp ‘Sport’ version; and the top-of-the-line 400-hp ‘Cup’ engine, the latter which was available as either a 3.9-liter or 4.0-liter unit.Now there’s a new collaboration between the two industry giants. They’ve come up with a new take on the M64 Porsche engine by swapping in a revised four-valve cylinder head, variable-valve timing, a new combustion chamber design, and new intake and exhaust routing. “The engine in a Porsche 911 Carrera Coupe or Cabriolet Reimagined by Singer represents multiple firsts,” the company says. “It is the first engine restored by Singer to feature variable-valve timing, optimizing drivability at low speeds, power at high revs, and a more linear torque curve across the entire rev range.”Prototype valvetrain, showcasing the four valves per cylinder.’ expand=It’s also the first naturally aspirated engine restored by Singer to use water-cooled cylinder heads combined with air-cooled cylinders, and an electrically powered fan, utilizing learnings from the company’s DLS Turbo program, which was an ultra-high-performance restomod project introduced in 2023 to push the boundaries of air-cooled Porsche 911 restorations by heavily modifying the Type 964 chassis and adding extreme, race-inspired twin-turbocharged engines. The result of the DLS program was an engine that would make 710 hp and spin to 9,000 rpm. But that’s another story. Flat-six, based on the Type 964’s engine, restored and developed by Singer with engineering from Cosworth. 4.0-liter capacity, four-valves per cylinder, variable-valve timing, water-cooled cylinder heads, air-cooled cylinders, and inclined, electrically powered fan.This most recent Cosworth collab is aimed not at peak power, but at drivability. While the latest result is “only” 420 hp, just 20 more peak ponies than the company was claiming 15 years ago, the difference, says Singer, is that taken together, the new features on this latest engine help the 4.0-liter flat-six broaden its torque delivery across a wider range of engine speeds. “The engine will rev to over 8,000 rpm and, to encourage drivers to explore that range, an optimized, six-speed, manual gearbox can be specified, sending power to the rear wheels,” Singer said.You can even specify a raised gear shifter with an exposed shift mechanism to further display the new car’s mechanicalness. A newly developed titanium exhaust system provides free breathing for the flat-six and its famous soundtrack.How much is this new magic? Pricing was not listed, but recent Singers have gone for over a million bucks for the whole car. You’ve got that in petty cash. So sign up now!