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Ed Rinke Performance

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Chevrolet Performance Race Blocks

Chevrolet Performance Race Blocks
Chevrolet Performance Race Blocks are all about serious horsepower.
Precision is the operative word for them, from start to finish, so you can
depend on them to get you to the finish line first. Chevrolet Performance
Race Blocks use only the highest-grade materials and machining techniques.
The blocks are CNC-machined1 with closer tolerances than Bowtie blocks.
Race blocks feature full race-prep machining and 4-bolt splayed2 main caps.
Chevrolet Performance Race Blocks have proven themselves repeatedly in
NASCAR and NHRA-sanctioned races. Chevrolet Performance race blocks
have the power and reliability to put your car in the winner’s circle.

Chevrolet Performance Race Block Technical Notes:
• 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