The 850 is a great carburetor for the high power small block and moderate power big block racing engine.  Very capable of sufficiently feeding an engine up to 850 horsepower on gas, this carburetor still retains the capability of good low-end throttle response due to good air speed.  Many racers have found on their big block applications that taking a Dominator carburetor off and installing a VDL Fuel Systems 850HP resulted in significantly quicker lap times.

VDL Fuel Systems has done extensive dyno testing to establish the proper air/fuel circuitry producing a flat curve that results in maximum torque and horsepower while maintaining good horsepower numbers in the high RPM range.  Most racing carburetors can be jetted to produce big torque numbers or big top end horsepower numbers, but there is always a trade off between the two.  VDL Fuel Systems carburetors have a balanced network of metering systems that produce a superior performance curve from start to finish.  An added benefit to VDL Fuel Systems’ properly tailored fuel curve is that by taking out the excessive fuel on the top end (a typical characteristic of these carburetors), not only did the power curve improve but also there was a significant gain in fuel economy.

Assembly is done to tolerances unobtainable in high volume production.  Boosters are installed to within .001’’ on height, twist, and pitch.  The base plate is matched to the main body.  All gaskets are properly matched to the main body to prevent overhang.  And finally, the throttle plates are adjusted for optimum position angle on the flow bench.

Track testing has given VDL Fuel Systems an extensive database for producing optimum throttle response and drivability in specific applications.  VDL Fuel Systems produces a custom built; fully optimized carburetor built to your specifications and engine application – not just another “out of the box” carburetor.  You will notice the difference!