I would say it's pretty much a sure thing the valves are bent. Because as already discussed, 14* of cam timing will not have the pumping pounds down 100psi from where it should be

Monte, that's my feeling as well..... But "never say never"

"If" the ex valves aren't tweaked(and that's a big if), then moving the cam a tooth with get the intake c/l close to where it should be...... And then the cranking pressure would be whatever it is.
It's not going to gain 100psi, but at least you'd know what that number was.
That being said, as I mentioned before ....... I feel you'd need at least 180psi cranking pressure to really make good use of that cam. If it's only 140-160 or so(without bent valves), then I'd probably look at installing something a little shorter.

But, I think the results of a leak down test would point the direction on what to do next.

Edit: I just used the Wallace cranking compression calculator.
A 14:1 470 with a 287@ .050 cam in at 108 should pump 181psi at sea level.
Move the cam to 122 and it drops to 126psi, so a 55psi difference.

What #`s do you come up w/Fast on my 12.1.1 470 w/276-281@ .050 in at 105 at 2500-3000 ft elevation.............thankxxx..........

Or not............. I`ll figure it out.........

It's one of the Wallace on line calculators........punch in the numbers..... See the results.

I found it but need my cam card for opening/closing events so I`ll dig it up later just got a grip of carbs...........

so one tooth brought it in to 108. Thats the only good news. I installed 100 psi on the leak down and it only has 80 on the other side. Pretty much all the valves are bent. Thanks for all the help. Birdtracker

Honestly....... That's 20% leakage....... I would have thought it would be worse than that.

Did it seem like there was a lot of air going by the exhaust valves?

Sorry to hear this man but maybe you can get some better valves w/a nice back cut and rock n roll unless you already have good ones............

I agree if you have bent valves it would be pouring out the exhaust...I my experiences highly audible/noticeable.

Many times when there is light contact between the valves and pistons, with the valves hitting the pockets nice and square, it will barely tweak them..... To the point where you can't even see it, but they leak. When you reface them you notice they have been tweaked.

Apparently there was quite a bit of p/v clearance, otherwise it should have tagged them harder, which would mean a higher leakage %.

Just cuz I'm curious, I would have stuck a pair of lifters and rockers back on it and done a compression test on a couple cyls........ Just to see.

Take heads off, poor gas in chamber. If it leaks past valves you have trouble, if not then your ok

Rubbing Alcohol is better, with some red food coloring.

Setting the input pressure at 100 and getting 80 lbs on the outlet calculates to be 20 % leakage, not good but not horible either Where the pistons at TDC? If not redo them with the pistons at TDC and see what you get I have seen over 6% differences on the same cylinder when leaking them cold by slightlly rocking the crank 1 to 3 degrees either way Another way to verify the sealing on the valves is to pop the top of the valves so they open a little bit under pressure with a soft blow hammer when the air is in the cylinder I've seen a gain on the readings that way also Same thing on a cold leakdown and then retesting it with the motor warmed up If you get it to test better than 12% I would run it until you can get the motor out and check the ringlands to ring side clearances and see if the ring ends show signs of butting