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Making you go fast is what we do best!

Welcome to Downs Engineering

Home of Realm Runner Race Cars - outstanding competition cars and an outstanding track day car -and Race-winning Suzuki Hayabusa engines

06 turbo car

Downs Engineering is your complete source for race cars, custom cars, sand rails, dune buggies and race engine construction and development.

At Downs Engineering, we specialize in

  • designing and building high performance racing cars -either our design or customer specifications
  • performance modifications to existing race cars
  • engine development to increase performance and reliability

Downs Engineering owner, Mike Downs, has been building and driving race cars since 1966.

From Trans Am to Formula One cars, the company offers complete services for constuction, maintenance, repair, and restoration as well as mechanical engineering projects.

All projects receive Mike's utmost attention and are executed with the highest quality materials, proven technology, and quality assurance. His professionalism has earned him an enviable reputation in racing circles.

Suzuki Hayabusa Engine Development Continues

Downs Engineering has been building and developing the Hayabusa engine since the engine was introduced in 1999. In the last 8 years, we have built over 100 engines, both normally aspirated and turbo-charged. Our years of experience enable us to give you the perfomance you need with the reliability you want.

We have also developed many parts and systems to make the Hayabusa engine suitable for car conversions -- for kit cars, road racing, autocross, sand rail, off road, and oval racing. Our engines have won many races and SCCA Championships for their drivers.

We have developed the best Dry Sump Oil System on the market. It is the most tunable system on the market and holds the most oil volume of any Hayabusa oil system. Our wet and dry sump oil pans retain the most oil around the oil pump pick up to ensure oil pressure in hard cornering uses.

We have also developed fuel systems for delivering all the fuel you need, when you need it. Our fabrication shop enables us to make exhaust installations to suit your needs. Custom parts we make to order include motor mounts, exhaust systems, suspension systems, water and oil tanks, and turbo plumbing.

Dyno Room Now Open

After months of development, the dyno room is now up and running. The Stuska Dyno runs with software from Performance Trends and gives us all the performance data you need to get the most out of your engine.

Line Card Available OnLine

After many requests for information about the parts and services we can provide for your racing car, we have finally gotten the line card added to the web site! Please check it out, and let us know what you need. If you need something you don't see listed, please give us a call so we can add it to our site.

turbo exhaust

DR-6 TURBO Ready to Race

Our Realm Runner Race Car has been competing successfully in SCCA C-sports Racing, winning races and championships for years. 2006 brings some further improvements to the successful race car.

New bodywork, new frame, lighter weight overall and more rear weight mark the changes in the 06 DR-6Turbo Sports Racer.

In addition, changes to the available engine packages mean your choices range from 1300 cc 180 hp to 1600 turbo-charged 375 hp.

The 2006 DR-6 Sports Racer is a perfect track car - minium maintenance, reasonable cost, fast, and fun!

Engine Conversions

Downs Engineering also specializes in conversions of Hayabusa engines to automotive uses. We can make complete cars or supply fabricated parts for your vehicle

Call Mike for more information.

Downs Engineering
19564 Eighth St East
Sonoma, CA 95476
707-938-1011
fax 707-935-0481
email: mdowns@downsengineering.com