Detailed Internal Component Analysis
At 31:17 in
Lake Speed's Ford C3 NASCAR Engine: Time Capsule of 90s Technology! (Dyno & Full Teardown)
What happens here
The inspection reveals that the engine is built with good quality components, including an H-beam connecting rod and CP (CP-Carrillo) pistons, and a Hank the Crank crankshaft, indicating solid internals. However, the piston tops show evidence of being 'reverse dish,' meaning they are designed to lower the compression ratio to approximately 9:1. This significantly reduced compression (compared to a typical 13:1 for a NASCAR engine) is identified as the primary reason for the engine's low horsepower output. Further inspection using a profilometer reveals that the cylinder walls have very low valley depth (24.43), indicating a very smooth surface finish that may not retain enough oil for optimal piston ring sealing, potentially contributing to the high blow-by observed during dyno testing.
Goal: Identify specific components and measure critical engine parameters.
Tools and materials
- Calipers — Measuring piston dimensions
- CP Pistons CP-Carrillo — Internal component, identified as reverse dish
- H-Beam Connecting Rods — Internal component, noted for strength
- Hank the Crank Crankshaft Hank the Crank — Internal component, identified as a premium racing crankshaft
- Profilometer Mitutoyo — Measuring cylinder wall surface roughness (Ra) and valley depth (Rvk)
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What they say
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