Test out our new calculators
Snap a photo of any port with a ruler laid flat beside it, tap two points to set scale, then tap inside the opening. The tool floods outward from your tap point and measures the actual cross-sectional area from the pixels themselves — no formula, no assumed shape. That means it works just as well on a straightforward rounded-rectangle port as it does on siamese, kidney, or any other irregular shape a spreadsheet can't touch. Built for a quick field reading against your calipers, not a replacement for them.
Compares two valve seat angles side by side to show how much perpendicular seat gap each one opens at a given valve lift. Pick a lift (0.050" or 0.100"), set an angle for Seat A and Seat B, and it calculates the perpendicular gap for each using basic trig, then shows the percentage and absolute difference between them. Useful for quickly sanity-checking how a seat angle change (say, going from a 30° to a 58° seat) actually affects flow area at the seat before committing to a valve job.
Enter cross-sectional area readings at 3, 4, or 5 zones along a port — stock and ported side by side — and it plots both profiles on the same graph so you can see exactly where and how much material came out. Automatically calculates MCSA (the choke point, i.e. the smallest reading) and average CSA for each side, then shows the percentage gain at both the minimum and the average between stock and ported. Switch between mm² and in² on the fly. Built to turn a set of port measurements into a clear before/after picture rather than a spreadsheet of raw numbers.