Boost Leak Checking Clarification Needed

[Onefast99gsx]

Having been into DSM's for 5 years now, I feel stupid for even asking this but I'm not finding consistant information. The vfaq doesn't state anything about it. Some say to put #1 at TDC. I found a report that someone puts theirs at 10* ATDC and even another person who puts his at 30* ATDC.

Last night I borrowed the neighbors air comp to do some checking. Couldn't finish because the dam belt blew on the air comp. I put #1 at TDC and I couldn't even get a rise out of the boost gauge. So.. I cranked the motor clockwise about 4 teeth on the cam gears. I got the boost gauge to rise to 10psi but it would fall within seconds.

So because I'm really unclear on where to have the pistons during the test, I don't know if I have boost leaks or the if the valves aren't in the right position to even perform the test.

I have HKS 272's if that makes any difference.


Thanks for any help.