Compression test?

Ok, so today I rented a compression tester from Autozone, and tried it, however I was unable to tighten it into the spark plug socket and get a seal, because of a really crappy design. So when I cranked over the engine, I only built up about 60 PSI. My question is what brand or style of compression tester do you guys recommend?

 

I guess I have a question first. Why are you compression testing?

 

I has snap-on

 

I'm doing a compression test because I never have. I have had the car around 3 months, and it has been great, but before I start modding, I want to know where I'm at. I also need to do a boost leak test, but I don't have an air compressor or the tester.

 

if anything do a leak down test it will tell more whats up

 

How do you do that?

 

With a leak down tester LOL