Chevrolet Performance Small Block Chevy Bowtie Race Blocks - JEGS

Chevrolet Performance Small Block Chevy Bowtie Race Blocks


Chevrolet Performance
Chevrolet Performance Small Block Chevy Bowtie Race Blocks

Chevrolet Performance Bowtie Race Blocks take the guesswork out of what you need to make big horsepower. These blocks feature the very best materials throughout, 4-bolt splayed main caps and full race-prep CNC-machining with tighter tolerances than standard Bow Tie Blocks. Competition proven in NASCAR and NHRA-sanctioned races, a one word description for these blocks is "Precision", they are designed for you to depend on, from start to finish, to get you to the finish line first! When your competitors fail on the race track, you'll still be in the show thanks to your Bowtie Race Block!

Features:
  • Precision CNC-machining means +/- 0.001-inch tolerances.
  • Cylinder bore wall thickness is 0.225" minimum at 4.155" bore. A sonic bore check data sheet is provided with block
  • Nominal wall thickness of cylinder bores is 0.340"
  • Cylinder decks, front and rear of case, oil pan rail surfaces and head dowel pins are blueprinted
  • Extra-thick deck surfaces have blind-tapped head bolt holes for superior head gasket sealing
  • Enlarged cam bosses allow custom machining for larger bearings
  • Non-standard cam bearings are required (see each block for details)
  • Extra-thick main bearing bulkhead is machined at 5°
  • Bearing cap inner bolts are spread 0.210" to allow machining for 400 journal crankshafts
  • Premium quality main studs and SAE 8620 steel main bearing caps
  • Priority main oiling system
  • Billet wet sump rear main cap can be adapted to dry sump with plugs
  • 2-piece rear main crankshafts and pre-1986 oil pans are required
  • Use of some aftermarket mechanical roller lifters may require clearancing top of lifter bores
  • Timing system clearance should be checked before engine assembly
  • Lifter valley oil scavenging boss below bell housing flange is not drilled or tapped
  • Oil dipstick holes are not drilled



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    2 Products View All
    Small Block Chevy Cast Iron Bowtie Race Blocks

    		809-24502503
    		Cast Iron Bowtie Race Block
  • 350 Main
  • 3.980" finished bore
  • 4.155" max bore
  • Standard Deck 9.025"
    More info on Chevrolet Performance 24502503
    $119
    		• $2,831.99
    Ships
    06/25/13

    		809-24502650
    		Cast Iron Bowtie Race Block
  • 283 Main
  • 3.980" rough bore
  • 4.190" max bore
  • Short-Deck 8.325"
    More info on Chevrolet Performance 24502650
    $119
    		• $4,356.99
    Ships
    06/25/13

    2 Products View All