Carrillo Industries got its start in
1963 when Fred Carrillo saw a need for dependable, high
quality connecting rods for the high-performance racing
industry. Many parts of the internal combustion engine
are susceptible to failure, but one of the most susceptible
is the connecting rod. The connecting rod transfers
energy from the engine, to the crankshaft, and ultimately
to the final drive mechanisms. A failed connecting rod
can result in a lost race and the potential destruction
of a very expensive piece of machinery. Since the conception
of the connecting rod business, Fred and Carrillo Industries
have been dedicated to precision and quality construction.
Our design goal for every rod we make is to maximize
strength and durability while minimizing weight.
Manufacturing connecting rodsFred Carrillo's experience
with engines is based on several decades of active participation
in competition with motorcycles, dragsters, straightaways
and predominantly championship cars. Fred combined his
aerospace background with his years of experience in
competitive racing, to design and manufacture the most
durable and long-lasting connecting rod that would endure
even the most severe conditions produced during high
Fatigue is the major cause of connecting rod failure.
At Carrillo Industries, we use proprietary steel, manufactured
and forged to our own custom specifications. After experimenting
with virtually every other reasonable material, we have
found this chromium / nickel / vanadium / molybdenum
FORGED alloy to be the best product to meet our stringent
requirements for strength and durability.
Our connecting rods are fully machined to guarantee
the removal of all surface imperfections in the forging.
After heat treatment, each connecting rod is 100% magnaflux
inspected and hardness checked, then machined to final
size. Each set of rods is balanced and then shot peened
to achieve the ultimate in strength and fatigue properties.
One of the most susceptible points of failure in conventionally
designed connecting rods is the fastener system. At
Carrillo, we have exerted a great deal of effort into
developing rod bolts for specific applications. This
effort has led to the utilization of four different
bolt designs. The largest bolt available is a 7/16 inch
diameter thread, fabricated either from AISI H11 tool
steel or Multiphase® material. Many questions are
directed to us regarding proper bolt selection. Briefly,
the H11 bolt (WMC7 and WMC6) is a high quality, aircraft
standard fastener, applicable to most high performance
uses. Under racing conditions, we suggest that the H11
bolts be changed periodically. In comparison, the Multiphase®
bolt (SPS-CARR) is designed to be a non-replacement
Our manufacturing procedures at Carrillo Industries
are fundamentally simple in nature: we blend the accuracy
and repeatability of computer assisted machinery with
the craftsmanship and attention to detail offered by
qualified and concerned employees.