ok im trying to check my piston to valve clearance on my build. i know i can do it without taking the head off by using dial indicators on the retainer, setting the cams to the overlap position, and setting the piston to TDC. then loosen the cam gear bolts and turn the cam til the valves touch the piston, zero the guage, then turn the cam back til im at my minimum allowable clearance. and that will tell me how far i can safely go for cam gear tuning purposes. now i just need an easy way to lock vtec. i really dont want to disassemble the head. ive never pulled the rockers out and im a tad scared to. head is already installed on the block and toqued down, dont want to take it off as ill have to get another HG. i checked how far it would go til it hit the piston on the non vtec lobes (pointless i know) but it tops out the cam gear (full advance intake, and full retard exhaust) and the skunk2 gears do something like +/- 12 degrees. so its looking promising. the head/block has been milled but i dont know how much. i calculated the degrees that the crank was off when the cams were at TDC, not the other way around. and the crank moves twice the amount the cams do right? so the 3.4 degrees i got the crank being off by would then mean my cams would only be off by 1.7 degrees correct? also need piston to valve specs for skunk2 stage 2 cams... or is it general to use the specs mentioned in another thread .050 intake .080 exhaust ? and a little OT, i know the exhaust clearance it going to be bigger anyway since the exhaust lobes (generally) have less lift and duration but why would you not want it tighter? like what would be the big deal if you had .050 on the exhaust side? ive pretty much figured all the cam stuff out now and how to do this without taking the head off, but im looking for easier ways to lock vtec, without taking the rockers apart, and if possible without using air. the main reason i want to avoid the air thing is because people have been saying that you loose pressure very fast since it just leaks out. but someone from h-t said something about being able to keep it in vtec without having a ginormous compressor, something about moving the cam back so that the pins stay still.. any ideas?