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Comp Ratio base on: .042 gasket, .017 down in the hle w/64cc heads
Block Height: 9.599
Forced Induction: No
Nitrous: Yes - up to 250 HP
Pins: .984 dia. x 2.500 lgth x .150 wall
Ring Grooves: 1/16, 1/16, 3/16

Ross Pistons
Chrysler Small Block
"A" Block Pistons
Includes: Pistons, Pins, Spiro Lox
  • ROSS "A" block pistons are ideal for many applications.
  • Ring grooves are 1/16, 1/16, 3/16.
  • Designed to have .017 deck with uncut block.
  • Compression ratio based on .042 gasket and piston .017 down in the hole with 64 cc heads.
  • Part numbers 99626 & 99628 will work with factory open or closed chamber heads only. Balance of part numbers will work with Mopar open and closed chamber, Edelbrock and Indy heads.
  • Pins included are .984 dia., 2.500 length, .150 wall, 128 gram weight, and are aircraft quality.
  • Made on special ROSS forgings for maximum strength with minimum weight.
  • 340 stock bore is 4.040, stock stroke is 3.310.
  • 360 stock bore is 4.000, stock stroke is 3.580.
  • NOT RECOMMENDED FOR SYSTEMS OVER 250 HP OR BLOWERS PRODUCING MORE THAN 5 PSI.
Block Bore Stroke Rod Length Dome CCC.R.  C.H.  Weight Part # Price/Set
Notes
340  4.070  3.310  6.123  -5.5 9.8 1.804  514  99625 $535 1
340  4.070  3.310  6.123  12.6 12.5 1.804  560  99626 $575 2
340  4.070  4.000  6.123  4.2 13.1 1.459  509  99788 $575 1
340  4.070  4.000  6.123  -21.0 9.5 1.459  488  99786 $575 1
360  4.030  3.580  6.123  -5.5 10.4 1.669  484  99627 $535 1
360  4.030  3.580  6.123  10.5 12.5 1.669  510  99628 $575 2
360  4.030  4.000  6.123  3.0 11.5 1.459  479  99789 $575 1
360  4.030  4.000  6.123  -21.0 9.5 1.459  470  99787 $575 1

Notes: (when applicable)
  1. Will work with Mopar open and closed chamber, Edelbrock and Indy Heads.
  2. Will work with factory open or closed chamber heads only.
 
 
 
 
 
 
 
 
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