It's not a miscalculation in either case. The single piston force is not doubled, and the 4 piston calipers have 2 pistons per side of the caliper. Only one side is used for the calculation. This is explained earlier in the paper I linked in post #34 about how to do the brake force calculations, it's common practice for the calculation. Most of the available calculators for brake force include an explanation as well.
You could use the area of all 4 pistons for the fixed Wilwood calipers, but then you would also double the area for the single piston sliding calipers (opposite and equal reaction). Instead, one side of the caliper is used for the calculation so the results are easily compared and no doubling or halving needs to take place.
I didn't do the calculation wrong as I explained above. The way I calculated it using a single side of the caliper is a common practice, that's why the calculators are set up that way. If you use both sides of the caliper for the fixed multi-piston calipers you must also double the area for the single piston sliders. There are plenty of examples of the calculations being done in that manner.
Your characterizations of my qualifications, and me personally, are inaccurate and not worth addressing further.
Thank you. Hopefully this post is straightforward enough not to be misconstrued as bashing.
I apologize for letting myself get dragged into the personal attacks.
