Bolt-On Performance Throttle Body
No TB Adapter Required
Fits Honda/Acura Chassis w/ K-Swap
The Hybrid Racing big bore K-series throttle bodies are by far
the most feature packed throttle bodies on the market. When we
designed this throttle body, we wanted to create a reliable product
that allowed as much flexibility in your setup as possible.
One simple, but very notable feature of this throttle body is
the dual bolt pattern. By incorporating two bolt patterns, this
throttle body is able to bolt directly to a PRB or
RBC intake manifold. By eliminating the need for an
adapter when upgrading from a PRB to RBC
intake manifold, this throttle body saves you as much as $75.
Another great feature on this throttle body is the ability to
delete or retain your factory cruise control. This is the only big
bore throttle body on the market that allows you to retain cruise
control. Who says you cant make serious power AND keep
your creature comforts
In the spirit of making this throttle body the most
setup-flexible on the market, we incorporated integral block-offs
for the IACV, Emissions Solenoid, and MAP
sensor. The IACV can be completely blocked off using
the four included 1/8 NPT plugs. The Emissions
Solenoid and MAP Sensor can be blocked off using the
included aluminum plugs. Better yet, the aluminum plugs can be held
down using the supplied retaining rings, meaning no worries of
plugs popping out if youre running boost! This throttle body also
retains the IACV coolant port that many manufacturers
hastily delete. This means that on K-swaps where
radiator/IACV clearance is an issue, you can still
rotate your IACV 180 and loop the coolant hose to
eliminate the interference with the radiator while keeping the
smooth idle offered by keeping the IACV.
Also notable are the dual, concentric torsion springs. Believe
it or not, this throttle body has 4 torsion springs built into it.
The throttle and cruise cables each get a dedicated torsion spring
to keep the cables taut, just like in the OEM design.
Two springs are used to shut the butterfly itself, making this
throttle body the only NHRA legal big-bore throttle
body on the market.
Last, but not least, the three bolts used to fasten the brass
butterfly to the steel center shaft are staked. Staking is the
process of deforming a bolt to prevent it from coming loose and
falling out. This means that even if one of these bolts were to
become loose, it would be unable to come completely out. If youve
heard of people blowing up motors from bolts falling out of other
manufacturers throttle bodies, then you know how important a
feature this is.
Our throttle bodies are available in 74mm and 70mm bores with a
76mm inlet. The proprietary knife-edged 76mm inlet design means
increased inlet velocities and lower inlet turbulence compared to
competing throttle bodies. They feature dual ball bearings, dual
needle bearings, integral O-ring seals, 6061-T6
aluminum construction, and a no-stick butterfly design. Each
throttle body is supplied with stainless steel mounting hardware
for all sensors and the throttle body itself. The kit also includes
a custom fit thermal insulating gasket to help you keep intake
temps down.
A note about boring your intake manifold:
It should be noted that a big bore throttle body should never be
used on an intake manifold that has not had the inlet bored out to
match the bore of the throttle body. A setup using a big bore
throttle body mated to an OEM sized inlet port will
yield lower performance than the OEM throttle body.
That said, when boring the inlet on an intake manifold, its best to
overbore slightly (about .25-.5mm is sufficient), to prevent the
chance of a lip that could create turbulence. While many people
will prefer to have a machine shop bore their manifold, if you are
familiar with forming metal using a die grinder and sanding drum,
you can bore your manifold yourself. If you are hesitant to bore
your own manifold, you should consult a machine shop first. Hybrid
Racing is able to supply prebored K-Series intake manifolds for an
additional charge. Also, note that the use of a 74mm throttle body
on a K-series intake manifold dictates that the boring process be a
bit more involved. Because of IACV port geometry,
boring a PRB, RBC, or RBB
manifold to 74mm requires boring a 74mm hole, then welding the
IACV passageway shut, and finally reboring the welded
area back to 74mm. A 70mm throttle body requires a single boring
operation only.
