extremely frustrated after new head gasket, I have at least one or cylinders missing now. Compression on all 4 cylinders is 155-160 psi. Checked spec, should be 199 with service limit of 170psi. 
 
 What I'm trying to figure out is head gasket thickness variance. The first head gasket I changed several months ago was very thin metal ( changed due to overheat). This last time I pulled the head, ( due to timing chain breaking and pistons kissing valves) my ebay head gasket kit had a much thicker composite head gasket, ( very noticeable). I kinda scratched my head then thought..." surely it won't make that much difference, it must compress a bunch when installed or something".

   So 2 big questions,

 #1 is compression 10-15PSI below service limit enough to make it miss?

 #2 are there supposed to be different head gasket thicknesses for these engines? If so how do I track down the thinnest one?

 I've already tried changing plugs and coils to home in on the miss, only other thing I haven't tested yet is fuel injectors to see if they're working but they were fine about a month ago and they're all plugged in.   


  Please and thanks for any help       

So, no one has offered a suggestion, so here are my thoughts.

I'm thinking if the normal compression is supposed to be 199psi (in great condition) and the minimum is allowable compression is 170psi... and your engine is now pulling 155-160psi across all four cylinders then your compression has effectively tanked and a head gasket probably isn't going to cure the compression problem. 

You didn't mention if you had your head machined after you pulled it to ensure it was milled flat and that your valves were properly replaced and seated.  You stated your timing chain broke.  This causes havoc on the valve train.  You could be losing compression from a warped head or from a couple valve seats or bent valve stems if they weren't properly repaired and replaced a trusted machine shop.

I would skip the e-bay deals and purchase an original OEM head gasket to answer your compression issue question AFTER you are sure your head is not the source of your lost compression problem/s. 

A thicker head gasket will decrease your compression reading.  (You have increased the volume to be increased.)  But a broken chain on an interference motor is BAD news, and bent valves are usually the result.  You could have slight damage on all valves resulting in leakage during compression readings, and missing while running.  Not to mention damage to head from overheating. 
Then again a miss aligned timing chain replacement could put timing off enough to allow small leakage and cause missing from valves slightly open at wrong times.  I have heard of issues during alignment of timing chains in 2.0 motors, so that is what I would double check first.