Okay I'll be the first to tell you I know some engine stuff but not nearly as much as I would like to know. I have a 02 camaro that started life as a v6. The previous owner dropped a 5.7 into it with a cam and PRC stage 2.5 heads. It has long tube headers going to a single pipe back to a dual through Borla mufflers and a 200 shot of nitrous. My issue is when we put the car on the dyno it had low numbers. I can tell something isn't quiet right with the setup you would think it would be a pretty decent street car. But in fact it isn't quiet where it should be. Not sure where to start looking or what it's missing. For one I am changing the exhaust to a x pipe with duals. The main issue is I bought the car and the guy I bought it from is away on vacation at one of our fine government establishments for a few years. So I was not able to speak to him like one would want to. So I have been left to figure it all out myself. It has a 78mm TB on a LS6 intake.

 

What were the numbers? About AFR and timing?