Lobby : Performance Tuning : Engine Parts
Mazda RX-7
12A, 13B, 20B performance engines
PowerFC, Haltech, AEM, wideband O2
cryogenics, coatings, rebuild kits, apex seals, pulleys
radiators,  Mazdaspeed, Fluidyne
injector upgrades, fuel cut defencers
spark plug wires
Intake options
Exhaust sytems, downpipes, midpipes, mufflers
flywheels, clutches, axle upgrades, differentials
Turbo upgrades, twins, singles
boost controllers, blow off valves, wastegates
Intercooler options
gauges
suspension kits, sway bars, brackets, bushings, etc.
brakes lines, cooling ducts, pads, rotors
Wheels and Tires
spoilers, wings, kits
interior options
 
 
 
 



 

 


If you have a high performance RX-7 but do not drive it hard, then you may not need cryogenics, or complete coatings, and such for the core engine. If you have a heavy foot or drive competitively, then you should consider your options to keep it under you and the road in front of you.

Engines built here are intended to be performance engines. Greater stresses are expected to be placed upon the motor to perform. So preparation of all components and utilization of technologies available are recommended if you want to increase power AND longevity.

Crogenics

Engine Coatings / Intake Coatings / efini piping kit coatings / Turbo Coatings / Water pump housing & Thermostat cover

Engine Rebuild Kits
Improved Steel Apex Seals
/ Ceramic Apex Seals

Pulleys / Oil Metering Pump Lines

 

Services are available to engines we build of course, but you can send us your components for cryogenic or coating treatments and we'll ship back to you for assembly. Keep in mind that treatments are intended to be applied to new or good condition parts to start with. Preparation and repair are meant to be kept separate in this instance.

Vendor / Item
Photo
Description
Coatings and Cryogenics

Cryogenic Processing

$call

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no photo

Cryogenics has been used in the racing industry for years now. When you have the demands of racing on high performance engines, engine components are subjected to great stresses. Increasing the strength and durability of the metal itself through cryogenics will make engines last longer. Simply put, the components are subjected to controlled freezing and warming process that further strengthens the metal. Racers claim 3-5 times increase in lifespan for wear on high performance engines.

Cryogenics available for alternators too! Increase voltage output. Call for details.

Engine Coatings Pkg

$call

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RotorSports Racing has teamed with Calico Coatings to offer coatings specific for rotary engines. Calico is a leader in engine coatings with customers in NASCAR, IHRA, and professional race teams throughout the US. If you have a rotary and interested in coating options, RotorSports has already done all research and development for you! These are NOT spray can painted coatings, but professionally applied custom coatings. Give us a call to place your order.

Coating specific components of the engine can have a variety of benefits with added performance and reliability. Highly recommended for performance engines. Rotors, oil pumps, main bearings, rotor bearings, and oil seals will receive different types of coatings to meet the specific demands of each. Reduce friction, provide heat barriers, resist corrosion, significantly reduce carbon buildup. Make power and keep that power longer!


A newly coated rotor on the left next to a used rotor. Excess carbon buildup on rotor faces can abnormally affect combustion and increase chance of detonation. Users have also indicated as much as 20% reduction in oil temperatures as well.

Upper/Lower Intake Coatings
Available in Coolkrome!

$call
Coat your manifold
(includes stripping, cleaning, and preparation)

 

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Teflon interior with ceramic exterior in Coolkrome or black! The teflon will improve fuel itemization, reduce carbon buildup, prevent icing, and improve airflow. The ceramic outer coating will provide a heat shield for intake temps and looks fantastic in Coolkrome or black. Polishing your intake looks great, but why not coat with ceramic coolkrome/teflon instead and enjoy the benefits that polishing does not.

Efini Turbo Piping Upgrade w/ coatings
Coolkrome outer/teflon inner

Efini Pipe Kit (uncoated)
$call

Efini Pipe Kit coatings
$call

Photos displayed show coated piping kit

The Efini Twin Turbo Piping Upgrade Kit Coatings - Functional and great looking! The two piece piping kit alone replaces the crack-prone plastic piping and y-pipe which connect the turbo outlet with the stock intercooler inlet piping. Controlling heat in the engine bay, we've taken the upgraded Efini Turbo Piping Kit and applied the same Coolkrome coatings as the upper and lower intake manifolds. Teflon interior with ceramic exterior in Coolkrome. Again, Functional with great looks! The ceramic barrier resists heat transfer between the engine bay and the air intake mixture. The teflon inner coating resists carbon buildup and improves air flow.

Purchase the Efini Piping Kit alone or with coatings applied. If you have the Efini Piping Kit already, send us your 2 piece piping kit and we'll apply the coatings for you. Coatings can be applied to an already polished pipe, but it's not necessary. The Coolkrome coating looks great either way.

Water Pump Body & Thermostat Cover Coatings
Coolkrome outer/teflon inner

Water Pump Body
Thermostat Cover
$call

WaterPump Body
$call

Thermostat Cover
$call

Also available are coatings for the water pump housing and the thermostat cover - These coatings look GREAT on your engine. For the customer who simply wants the best. The same Coolkrome outer coating and teflon inner coating will provide no significant power gains, but will resist corrosion and assist in keeping underhood temperatures down and keeping the engine bay looking clean. Nice touch!

Turbo/Exhaust Coatings

Twins with rebuild - $call

Twins w/o rebuild - $call
(call for details)

Single Turbos - $call

Downpipe - $call

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Exhaust and turbo systems emit a lot of heat. Keep the heat in the turbo(s) where it benefits power and reduce engine bay temperatures. Inner and outer coatings are applied. Use in conjunction with coated intake manifolds to further reduce rising intake temperatures caused by heat.

Twins - intake compressor and turbine housings, center housing, exhaust manifold, heat shield, wastegate cover. Some components require complete rebuild.

Single Turbos - intake compressor and turbine housings.

Coolkrome available for outer coating only on intake compressor housings.

Transmission Coatings
(call for pricing)
no photo
Coatings for transmission and differential components available. Call for more information.
Engine Rebuild Kits

Master rebuild kits are available. Inner and Outer Coolant Seals are improved over stock with teflon encapsulated silicon. Various o-rings are viton instead of rubber where beneficial. Stronger apex seals are used as well in both 2mm and 3mm sizes.

Part
Qty
86-91 Master Kit
93-95 Master Kit
Price >
$call
$call
Inner Water Coolant Seals - TEFLON ENCAPSULATED SILICON
4
Y
Y
Outer Water Coolant Seals - TEFLON ENCAPSULATED SILICON
4
Y
Y
Inner Rotor Oil Seal 0-rings - VITON
4
Y
Y
Outer Rotor Oil Seal O-rings - VITON
4
Y
Y
Dowel Pin O-rings - VITON
4
Y
Y
Rear Stationary Gear O-ring - VITON
1
Y
Y
Front Cover O-ring
1
Y
Y
Nylon Washer for Front Cover Pulley
1
Y
Y
Oil Metering Pump O-ring
1
Y
Y
Oil Filter Base O-Rings - VITON
2
Y
Y
Tension Bolt Washers
18
Y
Y
E-shaft pulley bolt o-ring - VITON
1
Y
Y
Injector Diffuser O-rings
6
Y
N
Crank angle sensor O-ring
1
Y
N
Oilpan gasket (shipped separately)
1
Y
Y
Front cover gasket-metal (shipped separately)
1
Y
Y
Front Main Seal
1
Y
Y
Rear Main Seal
1
Y
Y
Corner Seal Springs
12
Y
Y
Side Seal Springs
12
Y
Y
Corner Seals
12
Y
Y
Side Seals
12
Y
Y
Apex Seals w/ dual springs / 3mm seals come with single springs
6
Y
Y
Waterpump to Block gasket
1
Y
Y
Oil Tube Gasket
1
Y
Y
Hylomar
1
Y
Y
Brushable
1
Y
Y
Grey 999
1
Y
Y
Thermal Plug
1
Y
Y
Oil Pump Chain
1
Y
Y
Rotor Oil Seal Sets
4
Y
Y
Rotor Oil Seal Springs (Inner)
4
Y
Y
Rotor Oil Seal Springs (outer)
4
Y
Y
Instruction Set
1
Y
Y
Apex Seals

Apex Seals
with springs
(Steel)

$call 2 piece 2mm w/ custom dual springs

$call 2 piece 3mm w/ stock single springs

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Improved Steel Apex Seals - 2mm or 3mm

There always seems to be some discussion going on somewhere about apex seals; which to use, which not use, what size, what material, etc. Since a broken apex seal is often the problem found with low compression engines, a common misconception is that they are simply inferior, weak or worn out, and thus the seal failed by itself. Before going too far, let us first say this. Even the best made ceramic and steel apex seals are not indestructible. Proper tuning, fuel management, ignition timing, temperature control; they are all key to allowing any apex seal to function properly. Under adverse conditions, we can extend the limitation point at which a seal will break or warp. But proper tuning and diagnostics are the first concern to producing a reliable engine, not necessarily just using a "stronger" apex seal.

With that said, we offer both 2mm two-piece steel apex seals with dual springs and 3mm two-piece steel apex seals with single springs for forced induction (turbo) cars. Both sets are designed for performance engines intended to be broken-in properly and last. These are the same apex seals that we use in all of our custom built performance engines. Recent refinements in the manufacturing process, along with continuous improvement research and development, allow us to now offer even better apex seals than before. With perhaps the exception of very expensive ceramic apex seals, we believe our apex seals to be the best seals for competition, high horsepower, high boost applications, as well as all non-turbo engines.

Every "turbo" seal is sodium-nitrided, chemical and heat treated. Careful consideration to manufacturing processes and tolerances maintain consistency with every seal. The two piece physical design of the seals are similar to stock Mazda seals, but the material and treating processes are different. The 2mm seals include dual springs for each seal. The smaller spring is about 20% stiffer to ensure spring pressure is sufficient in higher boosted turbo cars, and also reduces the flattening of springs seen over time. The 3mm seals use Mazda apex seal springs.

We also offer 2mm 2-piece non-turbo apex seals that are heat-treated, hardened, and stress relieved throughout the entire cross section. Perfect for non-turbo rotary engines. Non-turbo rotaries experience different conditions than turbo cars. These seals also use the dual spring setup.

We cannot devulge any proprietory information on the alloy or the process for obvious reasons, but rest assured we trust the same seals in our own engines. We've seen these apex seals surprisingly survive in situations where other seals have failed.

Note: 2mm or 3mm apex seals? Keep in mind that the apex seal selection itself does not contribute significantly to power increases. 2mm seals do seal better than 3mm seals and allow less blow-by. 3mm seals have more material to resist against breaking under adverse conditions. If you plan to run 15psi of boost or less, then consider staying with 2mm seals. If you plan to run 15-20+ psi of boost, then you're more likely to experience detonation and as such we recommend the 3mm seals. Again, tuning and proper setup is key to longevity, but a good strong seal is great insurance when things go bad.

Ceramic Apex Seals

2mm or 3mm
Ionetti

Call for pricing

no photo

Ceramic apex seals are the best solution overall, but pricey at as much as 8 times that of steel seals. Are they necessary for a high performance engine? They are a benefit for longer reliability and more resistant to detonation failure. They can however still fail under exteme conditions.

The best overall solution is proper tuning to avoid detonation all together. With effective tuning, 2mm or 3mm steel apex seals will work fine. On the other hand, in repeated race conditions pushing the limits of power, ceramic apex seals will likely extend the running hours of usage between complete engine rebuilds. 2mm apex seals seal better than 3mm apex seals due to clearances required. We believe 2mm ceramics to be the best overall choice.

Pulleys

GReddy Pulley Kit
FD3S 93-99 RX7
(air pump removal)

$call Kit w/belt & pulleys

$call replacement belt

The GReddy Pulley Kit is designed to allow you to remove the air pump while retaining the factory main drive pulley. It is designed to work with the STOCK main pulley only. Two blue anodized pulleys replace the factory water pump and alternator pulleys and comes with a new belt. Greddy spare belts are available.

FD3S 93-99 RX7
Underdrive Main Pulley

$call

Designed to underdrive all belt driven accessories by 25% and safely extract more horsepower for your FD3S. Made of anodized billet aluminum. Includes new belts, grade 8 hex bolts w/ washers, and instructions. Removal of factory hub and eccentric shaft bolt is not required.

 

FD3S 93-99 RX7
Triple Race Pulley Kit
(air pump removal)

$cal

Kit includes Underdrive Main Pulley, and two billet aluminum pulleys that eliminate the need to run a belt to the air pump. Also includes belts, high grade bolts, and instructions. Allows less parasitic drag with up to 15HP gain. The kit still provides enough drive for alternator and water pump, however lights dimming may occur at idle. Note: Catalytic converter must be removed to use this kit. Recommended for race applications only.

FD3S 93-99 RX7
GReddy Pulley Kit
(air pump removal)

$call

Belt only
$call

Designed for the removal of the air pump but retaining the factory main drive pulley. The kit includes two anodized pulleys that replace the factory water pump and alternator pulleys. Kit comes with new belt. Replacement belts available.

FC3S 86-91 RX7
Underdrive Main Pulley

$call

Designed to underdrive the waterpump and alternator by about 15% and safely extract more horsepower and reduce cavitation of waterpump at high rpm's on your FC3S. Made of anodized billet aluminum. Compatible with the stock AC pulley. Includes timing marks at 10 and 0 degrees ATC and 10 and 20 degrees BTC. Easy installation. No belt included.

FC3S 86-91 RX7
Alternator Dual Belt Pulley

$call

Designed to reduce the alternator RPM by 20%. Made of anodized aluminum and compatible on cars with or without the air pump. No belt included.

Note: If you have removed the air pump, use both the underdrive pulley (above) and this alternator pulley in a dual belt configuration to avoid belt slipping at high rpms.

Racing Beat 74-92 RX7
Main Drive Dual Pulley

11469
$call

The aluminum Main Drive double sheave pulley is designed for high performance/RPM street and moderate racing use, slowing the water pump and alternator 13-15%, thereby reducing cavitation and power loss. If used with the Racing Beat Alternator Dual Pulley (below), you can have a true dual belt system. The stock AC pulley is accomodated. Includes timing marks at 10 and 0 degrees ATC and 10 and 20 degrees BTC. No belts included. (3/8" width required)

Racing Beat 74-92 RX7
Alternator Dual Pulley

11479
$call

The aluminum Alternator double sheave pulley reduces alternator RPM approximately 20% from stock RPM, and is intended for high performance and moderate race use. It is compatible with either the stock main pulley, or assuming you are not using the air pump, the Racing Beat double sheave aluminum main drive pulley. No belt included.

Racing Beat 71-92 RX7
Alternator Single Pulley

11492
$call

This Mazda Factory Race (MFR) single sheave aluminum pulley reduces alternator RPM approximately 20% from stock for street high-performance and racing use. It is intended for use with the 11470/11471 single sheave main drive pulley, although it can be used with the stock main drive pulley. The pulley is bored 15mm for use on small shaft alternators, although it can be bored larger if necessary. No belt included. 3/8" belt required.

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