The
stock fuel system on the 2nd generation Turbo II RX-7,
with an appropriate ECU upgrade, can support upwards
of 300HP* on the stock motor. The first component in
the system to need replacing is the stock fuel pump.
We offer an upgraded stock replacement pump which is
an easy bolt in and can support over 500HP*. Your
next limitation in the fuel system comes from the injectors
themselves. The stock Turbo II fuel system uses two 550cc
injectors for primaries and two 550cc injectors for secondaries
which come on a higher RPMs (Non-Turbos use 460cc). Those
injectors, maxed to their extreme limit (100%), will
support approximately 420HP* at stock fuel pressures.
You don’t want to push
the injectors beyond 80%-85% duty cycle though for reliability
reasons. To support more power on street driven cars,
we recommend using additional injectors.
Last but definitely not least, make sure you change your
fuel filter at least every 30,000 miles. No matter how
big of a fuel pump or how many injectors you have, you
won’t get the fuel you need unless you have a good,
fresh fuel filter.
*denotes
horsepower (HP) at the flywheel
SX
fuel pressure regulators are the most reliable, stable
fuel pressure regulators we’ve ever seen. They
are fully adjustable and can bypass enough fuel for
any size pump you can throw at them. They come standard
with dual fuel inlets for a variety of plumbing techniques.
The SX regulators are designed for use with -6 AN
fittings. For those using a standard 5/16" (8mm)
hose we offer a rubber hose adapter kit which includes
all the fittings and barbs necessary.
SX
Fuel Pressure Regulator - SX-6
Price: $164.95
5/16 Hose Adaptor Kit for SX-6
Price: $25.00
The
SX-10 regulators are designed for use with -10 AN
fittings. For those using a standard 5/16" (8mm)
hose we offer a rubber hose adapter kit which includes
all the fittings and barbs necessary. The SX-10 regulators
also have a 1/8" pipe threaded conection for
fuel pressure gauge connection or nitrous fuel tap.
This is the same one we use on our RX7.COM championship
drag car.
SX
Fuel Pressure Regulator - SX-10
Price: $164.95
5/16
Hose Adaptor Kit for SX-10
Price: $20.00
Fuel
Injector Connector - 84-87
Price: $15.00
Fuel
Injector Connector Only - 89-91
Price: $12.00
Fuel
Injector Resistor
Price: $10.00
The
stock fuel pump was designed to handle the fuel requirements
at near stock levels. Once you’ve upgraded
the car to a point where more fuel is required, you’ll
need to address this weak link in the system. We
use a special, high flow fuel pump, made by OE manufacturer
Denso in Japan, which exactly replaces the stock
fuel pump. This dual stage unit takes less than an
hour to install, doesn’t make any more noise,
is extremely reliable, requires no cutting, welding,
new lines, or anything else. It’s also the
highest flowing unit we’ve tested that doesnít
make the car run rich at idle, unlike other ‘bolt
ins’.
Introducing
our next generation fuel pump: it’s often hard
to make a good thing even better. Our previous generation
competition fuel pump has long been the standard
of the industry. Now we’ve made it even better.
The most important facts are still the same. It’s
still a direct bolt-in application and still a quality
Denso pump. Volume has always been the most of any
drop in pump, but now has been enhanced even more
(17% better than Walbro). To make it even better,
we’ve included an install kit. This kit includes
an OE inlet filter, o-rings, hose connections, hardware
and even a ground wire for a wiring supplement ($45
value). All these features and at the same price.
The pump has been tested
to support 500HP at the flywheel (at 40 PSI base pressure)
and is a good upgrade for those with upgraded ECUs and/or
those adding additional injectors.
| |
40psi |
50psi |
60psi |
| Walbro |
438 |
405 |
375 |
| Old RP Pump |
490 |
450 |
400 |
| New RP Pump |
490 |
475 |
425 |
RP
Competition Fuel Pump
Price:$296.00
The
engine computers on the Turbo II are programmed to
cut fuel to the rear rotor if boost levels are increased
beyond 8.6psi (87-88). To prevent this, we offer
a Fuel Cut Defenser which tricks the computer into
thinking it’s running
below that boost limit. This unit is a direct plug in
component and takes less than 5 minutes to install.
Tired
of poor mileage on your RX-7? Here’s a
solution. The oxygen sensor is out of sight and
out of mind. On many cars, it has never been
replaced. Unfortunately, O2 sensors lose accuracy
with time and eventually ends up hurting gas
mileage. Replacing this part every 30,000 miles
will keep this from ever becoming an issue. Many
have seen improvements of as much as 8mpg. Our
replacement is a direct fit and saves about $100
over the Mazda unit. Buy one today and save!
RP
Aftermarket O2 Sensor
Price: $40.00
Do
not starve your engine for fuel! One of the most common
maintenance mistakes we all make on our cars is not
changing the fuel filter regularly. Fuel flow is absolutely
imperative on any car, especially on turbocharged Wankels.
Old fuel filters allow debris to slip past and clog
injectors, impede fuel flow and put your engine at
risk. The recommended interval is 24 months or 30,000
miles. This RP aftermarket filter is a perfect fit
for the original and has been used on countless cars.
RP
Fuel Filter
Price:$19.36
