Rotary Engine
This catalog has not been updated since 1996, except for some minor editing to correct some part numbers or show items which are definitely no longer available. Any numbers which are still available, would still be good in this catalog.
You can click directly on the VIEW CART button when logged into the Motorsports site to enter these numbers. They will NOT in some cases show up on the keyword search box.
If you see an item which has a different description on the
Mazdaspeed Motorsports website, than in this catalog - believe the website. Some part numbers have been 'recycled'.
Open the bookmarks tab on the upper left for an index.
R OTARY E NGINE
Competition Apex Seal Information
Engine — Rotary
Carbon apex seals and Iannetti Advanced Carbon seals are recommended for any engine that will see 8000 rpm and above. They weigh significantly less than the stock (cast iron) apex seals and provide lower mass, keeping the apex seal in contact with the rotor housing face at high rpm. At high rpm, the stock (cast iron) seal overcomes the spring, causing the seal to skip across the rotor housing surface, reducing engine performance. Cast iron seals also can warp at high rpm.
Iannetti Advanced Carbon Apex Seals
Design
The two (2) spring design allows for a higher spring pressure which helps improve chamber sealing. This design feature allows the engine to be run with a higher degree of timing before “ TDC,” retarding the onset of pre-ignition or detonation and effectively increasing the engine’s horsepower capabilities. The insignificant wear characteristics of the material allows the use of almost double the apex spring pressure than could be used with other stock or carbon apex seals. This capability also contributes to better sealing, thereby improving the containment of the combustion chamber pressures, which in turn, assists in preventing the onset of detonation.
Material
The apex seal material exhibits the following qualities:
You can click directly on the VIEW CART button when logged into the Motorsports site to enter these numbers. They will NOT in some cases show up on the keyword search box.
If you see an item which has a different description on the
Mazdaspeed Motorsports website, than in this catalog - believe the website. Some part numbers have been 'recycled'.
Open the bookmarks tab on the upper left for an index.
R OTARY E NGINE
Competition Apex Seal Information
Engine — Rotary
Carbon apex seals and Iannetti Advanced Carbon seals are recommended for any engine that will see 8000 rpm and above. They weigh significantly less than the stock (cast iron) apex seals and provide lower mass, keeping the apex seal in contact with the rotor housing face at high rpm. At high rpm, the stock (cast iron) seal overcomes the spring, causing the seal to skip across the rotor housing surface, reducing engine performance. Cast iron seals also can warp at high rpm.
Iannetti Advanced Carbon Apex Seals
Design
The two (2) spring design allows for a higher spring pressure which helps improve chamber sealing. This design feature allows the engine to be run with a higher degree of timing before “ TDC,” retarding the onset of pre-ignition or detonation and effectively increasing the engine’s horsepower capabilities. The insignificant wear characteristics of the material allows the use of almost double the apex spring pressure than could be used with other stock or carbon apex seals. This capability also contributes to better sealing, thereby improving the containment of the combustion chamber pressures, which in turn, assists in preventing the onset of detonation.
Material
The apex seal material exhibits the following qualities: