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Comp Ratio base on: .050 piston to head clearance (deck & gasket)
Block Height: 9.800
Forced Induction: No
Nitrous: Yes - Up to 150 HP
Pins: .990 dia. x 2.930 lgth x .150 wall
Ring Grooves: 1/16, 1/16, 3/16
Tech Tip: Made for intake valves up to 2.300 dia. & exhaust valves up to 2.050 dia.

Ross Pistons
Chevy Big Block
Closed Chamber Hollow Dome Pistons
13 to 1 High Compression Ratio
Includes: Pistons, Pins, Spiro Lox
  • Ross high compression ratio Big Block pistons listed in this section feature special hollow dome forgings for maximum strength with minimum weight.
  • Designed for intake valves up to 2.300 dia. and exhaust valves up to 2.050 dia.
  • Suitable for nitrous systems of 150 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).
  • Ring grooves are 1/16, 1/16, 3/16.
Make Bore Stroke Rod
Lgth		 Dome
CC		 Comp Ratio
w/Head CC of:		 Dome
Height		C.H.  Gram
Weight 		Part # Price
106 112 116
427  4.280  3.760  6.135  36.000  11.8 11.1 10.7 0.700  1.768  637  83764 $659
427  4.310  3.760  6.135  36.000  12.0 11.2 10.8 0.700  1.768  657  86764 $659
427  4.375  3.760  6.135  36.000  12.3 11.5 11.0 0.700  1.768  685  88764 $659
454  4.280  4.000  6.385  36.000  12.5 11.7 11.3 0.700  1.398  563  82011 $659
454  4.280  4.000  6.135  36.000  12.5 11.7 11.3 0.700  1.648  615  83064 $659
454  4.310  4.000  6.135  36.000  12.7 11.9 11.4 0.700  1.648  625  86064 $659
454  4.310  4.000  6.385  36.000  12.7 11.9 11.4 0.700  1.398  574  82012 $659
454  4.320  4.000  6.135  36.000  12.7 11.9 11.4 0.700  1.648  628  99556 $659
454  4.350  4.000  6.135  36.000  12.9 12.0 11.6 0.700  1.648  630  99557 $659
454  4.375  4.000  6.135  36.000  13.0 12.2 11.7 0.700  1.648  661  88064 $659
 
 
 
 
 
 
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