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Cylinder Wall and Surface Finish Analysis

26:13
43:59
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At 26:13 in

This NASCAR Engine Was Built 20 Years Ago and NEVER Used! How Much Power Has It Lost? (Ford C3)

What happens here

The cylinder walls, previously observed to have rust, are now closely examined using a specialized digital microscope and a profilometer (surface roughness tester). The microscope projects a magnified view of the cylinder surface onto a laptop, allowing for precise measurements of roughness, cross-hatch angles, and the depth of rust pits. The profilometer measures surface texture in microns, providing numerical data for comparison. The rust pits, despite being visually significant, are quite shallow (around 0.6 thousandths of an inch or 15 microns), suggesting they didn't significantly impact ring seal. The analysis focuses on understanding how these imperfections affect overall engine performance and longevity.

Goal: Analyze the microscopic surface finish of the cylinder walls, including rust pits and honing patterns.

Tools and materials

  • Digital Microscope — Magnified visual inspection of cylinder walls
  • Honing Machine — Precisely honing cylinder bores
  • Honing Stones — Abrasive material for honing cylinders
  • Laptop — Displaying microscopic images and profilometer data
  • Profilometer — Measuring surface roughness metrics (Ra, Rk, Rvk, etc.)

What they say

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yeah down to like one number yeah it just it just doesn't I don't know the only thing I could think of is maybe maybe this did hurt a little bit of power but having a more modern lighter weight oil in it brought it back up and kind of walking I mean there could be I've washed it a little bit that's fair that's fair the modern synthetic race oil is going to be better than what they had back then for certain that's so that's the the weight watch this now we can get to the near Zoom that's that's like a crater yeah it looks like the moon yeah so why this new camera Pro kilometer setup goes with me everywhere I go I can't you can't beat this thing it's too incredible this just bothers me more that we never figured out why the other one made so little power because they're a massive vacuum leak we didn't know about where all the spark plugs screwed in the whole way what was the deal so it doesn't make any sense at all are you following this here like does this make sense to you this is some deep dive stuff you're not finding this in other places so that's the fresh area yeah so this is the bottom of this cylinder uh I'm not good at Ford numbering um I think this is one two but whatever bro that's that one that one the bottom of that one where the Piston doesn't go or the Rings didn't go this is what that surface was brand new so the pink area is the Peaks and then the blue area or the valleys and the area in between as they call that the core roughness so the rpk was like an 18 RK was a 46 our VK the valleys are 32. when we did the other engine it was the RV case were like 50. and The RK was around like 30. and then the rpk the Peaks were about 10. so it was much smoother yeah way different that's how much it changed just from that little bit of running so kind of what we're looking at here is all the Peaks being knocked off by yeah it went from what an 18 down to a two The RK was 46 it's down to a 13 and then the rvk is now the 23. so it has that same plateaued effect now that we're trying to do with the hone but the reality is you don't have as much Valley that's really what we're doing with the modern hunting process is we're starting off closer to here but we're adding more value to it that way we have more oil that way you have better lubrication and better seal so did the rust in here kind of like Plateau hone itself oh absolutely yeah I don't I've not seen it that quickly so is this not bad no that's not terrible it just won't last very long because…

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