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RACE SHACK is pleased to offer a 6000 sq ft purpose-built Tewkesbury facility, with all the benefits of:


  • Mustang Dynamometer 1850 DE Chassis Dynamometer System ("Dyno")
  • fully equipped CNC workshop with a Hurco Hawk 5M Mill & Ultrasonic cleaner
  • "Cake Crash" chill-out Dyno viewing area and coffee bar for customers
  • clean room (for engine assembly, Carburettor assembly and electronics testing etc)
  • wide selection of performance parts
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We tailor our services to meet your requirements as an individual, a motor club, or motor sports team. Whatever your need - engine tuning, engine building, machining, EFI programming - give us a call and chat through your requirements with one of our specialists.

The Mustang Dynamometer is an amazing piece of test equipment, which can help us tune your car to its peak performance, whether for ordinary driving or on the track:

  • 2000 bhp peak power, 900 bhp continuous power absorption
  • 250 mph maximum speed
  • capable of Sub 8 second _ 1/4 mile simulation - to within 1/10 of the actual track ET
  • Multi-channel data logging - including broad band Air/Fuel ratio with continuous weather station adjustments to ensure repeatability.

You will be given a full assessment of your car's performance including a graph of power, torque and AF ratio through each gear - we can then optimise your existing set up or guide you through potential upgrades.

engine_case_hands.jpgFrom affordable power-only runs for domestic vehicles to full diagnostic and system tuning runs for track day fans, privateers and full on race cars - we will tailor the test runs to customers' specific needs. Motor sports teams are welcome and the Dyno can be rented by the hour or for full days. Like it says above, we deliver measured performance for street, strip and track!

Large stocks of jets for popular applications always held including Webber, Dell & Holley petrol and Methanol - also we are fully equipped for EFI system programming - call for more details.

mill_sweep_600.jpg Our Dynamometer is unique equipment to Europe and its advanced features are not available anywhere else - be one of the first to benefit! Shoot out days a speciality

Carburettor cleaning and re-building : We have a large ultrasonic bath in-house - this is the only way to properly clean your carbs inside and out. Don't be fooled by a quick bead blast to the outside - the only true way to clean the internals of any make of carb is to use ultrasonics. The bright steel components can also be re-plated in-house - what you get is a re-build "as new" carb.


Call us for more details and pricing.


Wiring : Bespoke race car wiring - Aircraft / Military grade wiring harness. High quality low weight low voltage loss wiring systems for your race car - designed to your requirements and provided with full circuit diagrams and installed and tested in your Race Car - this can incude a separate fire up road cart - call for details.

Parts : We can supply virtually any performance part for street, strip or track and our pricing is very competitive! call for more details.

Fabrication : Specialist welding of ferrous and non-ferrous materials. All kinds of construction for performance vehicles.



  • come and chill out in our coffee bar while we show you who's really making the most power
  • virtual drag racing days or simply 0-60, top speed and top power shoot out you choose!
  • If you're not testing under real-world conditions - you're just spinning your wheels!!



holleycarb_sml.jpg VW air cooled performance engine building : RACE SHACK offers bespoke engine building for the VW community. We supply kits comprising every nut, bolt and screw required for a drive-away engine which is tuned for real-world performance using the RACE SHACK Mustang Dynamometer facility. From "mild" to "wild" - give us a call to find out more! - we are price competitive got a quote from elsewhere ? - come and see us before you order!

We offer a true one price - in your car and no hassle turn-key drive-away solution.



Engine break-in : If required, we can break in the engine on the Dynamometer using loads specifically designed to bed in your engine in the most effective way. You can then collect your car with it ready to enjoy - no more running in!

Quality system: RACE SHACK operates a quality system and provides you with full data and build records on all our engine builds and performance upgrades - we strive to maintain the highest level of quality in all that we do.