Radical Motorsport slaps new engine on SR1 XXR

Radical Motorsport has unveiled the SR1 XXR with the new Generation 5 engine.

The Radical SR1 XXR’s new engine has an increased recommended engine refresh interval by 25 percent. That said, the Radical Performance Engines (RPE)-tuned powerplant now offers more time on track for drivers, thanks to reduced warm-up time and thermal management upgrades, it provides enthusiasts the ability to lap faster and harder, for longer.

Alongside this, oil change intervals have also increased from six to ten hours, alongside a new drive-by-wire induction system.

“The SR1 will always be special to me, as I’ve witnessed first-hand how approachable it is for drivers wanting to take the step up in their racing careers. When developing the Gen. 5 RPE engine, we wanted to optimize its potential as much as possible, whilst staying true to what makes the SR1 so user-friendly. Although the entry-level racer, the SR1 XXR offers an outstanding package with unparalleled performance for the money, that will get you on the grid in a professionally administered race series. SR1 and SR3 models currently make up the majority of grids in the 12 Radical Cup championships around the world, with over 200 SR1s sold to date. Racers with the SR1 XXR will still be eligible to race in the PRO SR1 classes of Radical Cup championships around the world, too,” said Radical Motorsport Head of Research and Development James Pinkerton.

Further upgrades include a reduction in mass for the connecting rods, crankshaft pins, and the ignition system. These enhancements, Radical Motorsport, pointed out, improve engine response and drivability without compromising on durability. Combined with revised dry sump and cooling systems, improved coil-on-plug ignition systems, and new electronic drive-by-wire, the Generation 5 RPE racing spec engine has been optimized with usability and efficiency at the forefront.

Other notable updates brought by the SR1 XXR include durability updates, external gear position sensors for the gearbox, and a new scavenge pump design with an improved flow for the oiling system. Additionally, Radical Motorsport completely reworked the engine and gearbox calibration and made improvements to the flow rate of the cylinder head.

“The SR1 model has been key to Radical’s DNA for over ten years now, by providing aspiring drivers a window to the exciting world of motorsport, while still holding onto its approachable attributes. The past few years have seen our global race offering thrive, with 12 official Radical championships now operating worldwide. Therefore, there was no better time than now to develop and improve the SR1, to provide these aspiring racers with a chance to race at bucket-list tracks all over the world. After the launch of SR3 XXR and SR10 XXR, it was only right to align the SR1 under the XXR banner too, as, after all, it has proven to be the pillar of our company ethos — we make racers,” commented Radical Motorsport Chief Executive Officer Joe Anwyll.

The updated SR1 XXR is now available to order with production expected to begin later in summertime (from June to September).

Photos from Radical Motorsport

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