Add hotter cam or Add hotter head ?

318willrun said

Cam is the throne of all the timing events that is so important to an engine. Heads are the throat leading to the lungs, and we all know what happens when you squeeze the throat, you get a hung lung.

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Catch 22. If you can only do one, the right cam to match the rest of the combo will make a bigger difference I think. I had my heads done and kept the compression and cam relatively the same. It runs about like it did before. (seat of the pants dyno)