Compression Test Result ?'s

[Alpine TSi]

Recently I did a compression test and got 155's across the board. About 3K ago I had the head redone and valve seals replaced. I am not sure as to what all was done besides some healthy port work and stock valvetrain, Mike at QPR did it for me.

Now what boggles me is that the shortblock has 172K on it with no signs of being rebuilt, I am nearly 100% sure that it has never been touched. Normally I could just brush all this off as someone before me taking good care of the car and it is still holding up, even after 172K miles.

But the thing that bothers me about it all, is that if my hood wasn't shut while I made a full boost pull, I would launch the dipstick into orbit. Under approximately 20 psi I get nasty blowby coming from anywhere it can(valve cover breather, dip stick, valve cover, etc..). And then comes the oil spray from the dipstick. It is a nearly brand new stick too. I had to zip tie the thing down just to keep it from flying out(crimping the tube didn't work either).

I don't understand that how with nearly perfect compression why I am encountering so much blowby.

Any ideas?