SMG/K FA20 T=0.5
Opposed Bead Stopper Type Metal Gasket for the FA20 engine of 86/BRZ provides higher bore sealing durability than a stock gasket.
2 types of the gasket are available. One is t0.5 increased compression ratio type for an NA engine (ε12.6←12.5, supercharger installable, Endurable approximately 300ps)and another type is t0.7 high engine output type for a supercharged engine (ε12.4←ε12.5, Endurable approximately 600ps with supercharger)
＜POINT-1＞ With t=0.5mm gasket, NA engine's compression ratio increases compared with the stock!
The durability of the bore seal of this gasket t=0.5mm for NA engine is improved, and the compression ratio increase compared with the stock that makes this gasket ideal for one-make race. (This gasket can be installed to a supercharged engine.)
Stock Thickness: t=0.6mm (ε12.5) HKS Thickness: t=0.5mm (ε12.6)
＜POINT-2＞ Maintain a high seal with high pressure!
Both types are endurable against high engine output. Stopper structure of the bore seal is separated type so it prevents leakage even under high gas-pressure at high engine output.
＜POINT-3＞ Contact surface pressure is improved!
Special coating was applied on the head side and cylinder side to improve sealing performance when tightening the bolts.
＜POINT-4＞ Bore seal pressure was confirmed in figures. (See the diagram below.)
(Contact Surface Pressure Measurement)
* Comperd to stcok, bore seal is independent and has higher seal surface pressure, therefore same amount of stopper, bore seal is stronger.
* Thinner than stock and compression ratio is 0.1 highe
* Comperd to stcok, bore seal is independent and has higher seal surface pressure, therefore bore seal power is much stronger.
* Thicker than stock and compression ratio is 0.1 less than stock
* Bore stopper is similar to the other seal and ther surface pressure polymerize, it has lower seal ability than the independent type
|Engine||Thickness (mm)||Compression Ratio||Bore||Code No.||Manual||Remarks|
|FA20||0.5||ε=12.6||D89.5||23001-AT002||For NA, LH/RH each, opposed bead stopper type|