the type of pistons in your engine are the standard ones
why do you want to know, you arnt puttin GSL pistons in a GSR are you.
Hypereutectic piston
From Wikipedia, the free encyclopedia
Hypereutectic pistons are cast internal combustion engine pistons made from aluminum with over 16% silicon content for strength and durability. The term 'hypereutectic' comes from eutectic. Special melting processes are necessary to ‘supersaturate’ the aluminum with additional silicon content. Special molds, casting and cooling techniques are required to obtain finely and uniformly dispersed silicon particles throughout the material. This produces pistons that are very hard, thus brittle. They have proven to be un-forgiving with engine knocking. For this reason they are great in naturally-aspirated engines, but should be used with caution for 'nitrous', super- or turbochargers. Generally speaking, forged pistons are a better choice for high boost.
Hypereutectic pistons are used in many original equipment engines. They are favored because of reduced scuffing, improved power, fuel economy and emissions. The reduced thermal expansion rate allows the piston to be run with reduced clearance, which reduces losses due to gases escaping past the sealing rings.
Retrieved from "http://en.wikipedia.org/wiki/Hypereutectic_piston"
_________________ 2009 Black Xr8 Ute. Boss 290 2001 TM Racing 250EN 2T, HGS, Ohlins, brembos etc 1985 AB GSR. VR-4, LSD, Wolf, 188KW at the wheels FTW! 1984 AB GSR all in bits. 1982 JA Starion 1973 Yamaha RD 250 project cafe racer
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