I don't know if it's too much but it's kind of alot. It's only too much when they start to pull out and all your rocker arms start flying off. 300lbs is usually the bench mark. I, personally, run around 320@.520LIFT but then I don't put many miles on the car and I realise at that pressure my cam is living on borrowed time. That's why I have two more sitting on the shelf just in case.