400 MILE CHECK UP: 1990 Toyota Pickup rebuilt 22RE motor & spark plug heat range w/ ceramic pistons

Just a quick update on the Toyota 22RE - Changed from the Denso W20EXR spark plugs to the factory spec Denso W16EXR-U plugs and also adjusted the factory AFM (air flow meter) to 2-clicks more rich. WOW! The truck is a rocket ship now. Runs great, idles super smooth and has a ton of power from 3000 to 6000 RPM's. The Toyota factory ECU still goes a bit leaner than I'd like to see under WOT, but everywhere else it seems to be keeping the air/fuel ratio pretty decent (between .80 and .95 for the most part). The factory heat level plugs definitely seem to make a big difference over running the colder Denso W20EXR plugs.

Running this oil now:

Liqui Moly 2043 MoS2 Anti-Friction 10W-40 Motor Oil - 5 Liter :
https://www.amazon.com/gp/product/B00CPL952G/

Lucas ZDDP Oil 10063 Engine Break-In Oil Additive - 16 oz.
https://www.amazon.com/gp/product/B001DKN8ZU/

Break-in oil I used for the first 100 miles to seat the piston rings:
https://www.amazon.com/gp/product/B00INXYZH0/

Information on adjusting the factory Air Flow Meter (AFM) more rich or lean:
http://old.lcengineering.com/LCTechPages/fueltech19.html

I buy my Denso W16EXR-U plugs here and then modify the ground strap:
https://www.amazon.com/gp/product/B0012QBWBW/

Piston to cylinder wall clearance data:

KB Piston sizes as measured using Kanon 3-4 micrometer (from dot to dot) [measured with anti scuff coating which adds .0007")

Piston diameters - Cylinder bore A CWC / Cylinder bore B CWC / Cylinder A CWC w/ scuff coating:

Piston 1 - 3.6397 [3.6404"] .0038 .0026 .0031
Piston 2 - 3.6397 [3.6404"] .0038 .0033 .0031
Piston 3 - 3.6397 [3.6404"] .0035 .0029 .0028
Piston 4 - 3.6397 [3.6404"] .0039 .0032 .0032

NOTE: Cylinder bore measured half way down bore. "A" direction across major/minor thrust walls / "B" direction front to back. CWC = cylinder wall clearance as measured using Peacock 2-6" bore gauge calibrated to piston diameter (not counting .0007 anti scuff coating).

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