Rolling Road Highlights: Fine-tuning legends on our state-of-the-art Dyno - October 2025
Our rolling road dyno is a specialist piece of equipment that allows us to measure a vehicle’s performance under controlled conditions. It allows us to hold consistent loads and revs longer than on the road. The dyno allows us to measure several key performance metrics, including a vehicle’s horsepower, torque output, air-fuel ratio, and power delivery curves, which shows how the engine behaves under load. The rolling roads’ safe and controlled environment is great for fine-tuning carburettors, ignition timing and fuel mapping. In addition, it allows us to confirm that a restoration or engine rebuild is producing the correct performance. We have recently had a variety of classic and modern classic cars use our state-of-the-art rolling road to ensure they are finely tuned for great performance and drivability.
A modern classic car that has recently used our dyno was a Porsche 904 Carrera GTS. Introduced in 1964, the Porsche 904 had a fibreglass body bonded to a steel ladder chassis, making it lightweight and rigid and was initially fitted with the 2.0-litre flat-four from the 356 Carrera, producing around 180hp and going from 0-60mph in under 6 seconds. Later models went on to have a flat-six or flat-eight engine for competition. This Porsche 904 Carrera GTS came into our workshop for a carburettor set-up on our rolling road, which involves fine-tuning the fuel and air mixture delivered to the engine, which allows it to run smoothly, efficiently and at full performance.
Additionally, a Ferrari 365 GTB has recently been on our rolling road. After the Ferrari 365 was released in 1968, it was nicknamed the Daytona after Ferrari’s 1-2-3 finish at the 1967 Daytona 24 hours. This Ferrari houses a 4.4-litre Colombo V12 engine, producing around 352 bhp, which was paired with a five-speed transaxle for ideal weight distribution. The Ferrari 365 GTB goes from 0-60mph in 5.4 seconds and reaches a top speed of 174 mph. This Ferrari Daytona came to our workshops for carburettor fine-tuning to ensure the Ferrari has good power delivery and mechanical precision.
In addition, our Series 1 race Jaguar E-Type has also been on our rolling road dyno in preparation for the Spa Six Hours race at Circuit of Spa-Francorchamps. The E-Type, which is campaigned by our sister business, P&K Thornton, will be competing in this year’s event. To ensure the E-Type is performing at its best, we have upgraded to a new engine. The new engine, built by Tom Barclay, was installed in our 1961 Jaguar E-Type to ensure greater reliability and provide an upgrade in power. To ensure our new engine has the best results on track, we fine-tuned the E-Type on our rolling road.
If you are interested in booking your classic or modern classic car for tuning on our rolling road dyno, please don’t hesitate to get in touch. Call us on 0115 9262266 or email us at info@speedshop44.co.uk.