PISTON KIT L15A/LEA D73

21003-AH001

■Feature

PISTON KIT

• Factory replacement & standard bore size piston kit.
• Billet pistons are made from the 80mm-L60mm Aluminum rod material.
• Honda factory piston pins (18mm Semifloating pins) are required.
• Honda factory piston rings are required.
  The compression ratio when using the pistons with HKS Head Gasket is as follows:
  HKS Head Gasket t=0.8mm Gasket Bore: 75.0mm 8.7
  HKS Head Gasket t=1.2mm Gasket Bore: 75.0mm 8.4

 

CONNECTING ROD SET

• Semifloating pins on the connecting rod small end.
• The durability is improved by 186% comparing to the factory's durability with the 158.8(mm²) minimum cross-sectional area of the rod.
• The M8x1.0 sized connecting rod bolts are used for better rigidity.

* In-house test at 336PS/43.78kgf･m confirmed the durability and safety (including the Supercharger drive loss).

 

 

■Specifications

		HKS	Stock
Bore x Stroke		φ73 X 89.4mm	φ73 X 89.4mm
Comp. Ratio		ε8.7/8.4	ε10.4
	Gasket thickness	HKS t 0.8/1.2	t 0.80
	Displacement (cc)	1496	←
Piston	Bore dia.	φ73	←
	Compression height	26.0mm	←
	Concave portion capacity	17.5cc	8.7cc
	Material	φ80-L60 AL	Casting
	Ref. weight	178.5g	198.9g
Pin	Size	φ18	φ18
Ring	Top size	φ73 X 1.0 X 2.3	←
	2nd size	φ73 X 1.0 X 2.3	←
	Oil size	φ73 X 2.0 X 1.9	←
Connecting rods	Material	SCM440H	-
	Ref. weight	380g	314.5g
	Bolt	M8 X 1.0	M6 X 1.0
	Ref. capable torque	43.8kgf-m	30.47kgf-m

 

 

■Graph (300ps spec.)

 

	Power	Torque
GTS7040 80φ	300.5ps/6,100rpm	35.9kg-m/5,800rpm
GTS7040 85φ	285.5ps/6,300rpm	32.8kg-m/6,100rpm
GTS7040 90φ	253.1ps/6,300rpm	29.5kg-m/5,900rpm
Normal	143.4ps/6,100rpm	19.8kg-m/2,700rpm