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Big Block Chevy Ross Pistons
 
Comp Ratio base on: .050 piston to head clearance (deck & gasket)
Block Height: 9.800
Forced Induction: No
Nitrous: Yes - Up to 250 HP
Pins: .990 dia. x 2.930 lgth x .150 wall
Ring Grooves: 1/16, 1/16, 3/16
Tech Tip: Pistons feature hollow dome forgings for max strength and min weight
Ross Pistons
Chevy Big Block
Open Chamber Hollow Dome Pistons
12 to 1 Moderate Compression Ratio
Includes: Pistons, Pins, Spiro Lox
  • ROSS moderate compression ratio Big Block pistons listed in this section feature special hollow dome forgings for maximum strength with minimum weight.
  • Suitable for nitrous systems of 250 HP or less.
  • Pins included are .990 dia., 2.930 length, .150 wall, 149 gram weight, aircraft quality and are retained by double spiro lox or can be press fitted in rods.
  • Compression ratio is based on .050 piston to head clearance (with deck and gasket combined).
  • Ring grooves are 1/16, 1/16, 3/16
Bore Stroke Rod
Lgth		 Dome
CC		 Comp Ratio
w/Head CC of:		 Dome
Height		C.H.  Gram
Weight 		Part # Price
109 118 124
4.280  3.760  6.135  51.0 12.3 12.0 11.2 0.700  1.768  648  83762 $659
4.280  4.000  6.135  36.0 11.8 10.8 10.3 0.700  1.648  615  83064 $659
4.280  4.000  6.135  38.7 12.1 11.0 10.4 0.500  1.648  607  83063 $659
4.310  3.760  6.135  51.0 13.5 12.0 11.3 0.700  1.768  661  86762 $659
4.310  4.000  6.135  36.0 12.0 11.0 10.4 0.700  1.648  625  86064 $659
4.280  4.000  6.135  38.0 12.2 11.1 10.6 0.500  1.648  603  86063 $659
4.320  4.000  6.135  36.0 12.0 11.0 10.4 0.700  1.648  628  99556 $659
4.350  4.000  6.135  36.0 12.1 11.1 10.5 0.700  1.648  630  99557 $659
4.375  3.760  6.135  36.0 11.6 10.6 10.0 0.700  1.768  685  88764 $659
4.375  4.000  6.135  36.0 12.2 11.2 10.6 0.700  1.648  661  88064 $659
 
 
 
 
 
 
 
 
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