10/12/09 - National Press Release: 

Pro Systems develops racing carburetors for many levels of
competition.  Late last year the Billet metering block trend took off,
but our testing never revealed the power from the addition of billet
metering blocks UNTIL now.

According to company President Patrick James, previously tested Billet
blocks were built with "End Mills" in critical areas.  Using an end
mill reduces machining time but creates other issues.

Since a billet block is not a casting, exact required shapes are
difficult to achieve.  As a result the emulsion channels and other
passages were larger than required.  This process also required
compromises in port layout and some ports were just squared off to
simplify machining.  These processes saved time, but caused the
carburetor to be lazier during shift recovery and launch.  A condition
that would only show up at the racetrack.

After extensive back to back track testing we determined that if you
used epoxy to fill in the excess volume cut by these end mills and
hand ported off some of these abrupt edges made during the machining
process, we could make a billet block have the throttle response and
shift recovery that the cast metering block was always famous for.

The cast metering block previously had the advantage over billet
designs as by using a casting process the manufacturer could keep
these areas more compact and smoother in transition.  Two very
important features.

So we needed a plan, a new way to machine the billet blocks to reduce
these areas and remove these deep and/or squared off shapes so epoxy
and hand porting were no longer required.

PROBLEM SOLVED:  Our new Billet metering blocks use different
machining process to minimize the emulsion area volume and eliminate
the squared off shapes.  This offers us the increased throttle
response and shift recovery that previously we were not willing to
give up to enter this market.  This machining process makes it a bit
more difficult to build these blocks and a more expensive process, but
its the right way to do a billet block.

Our new 3 circuit billet metering block is now standard equipment on
all of our Dominator carburetors.

These Pro Systems designed billet blocks are an integral part of
improving the performance of our Dominator designs.

Click the Online Quote order form icon to your upper left for a quote today.

Prices start as low as $950.00