I'm doing a nitrous system on my car this week, and I need to know how big of a shot I can safely run. I'm planning to do a 300hp direct port, and I think I'll need to kick up the fuel system a little. What's the limit, and what upgrades do I need to look at? Will the Sean Roe fuel pump booster do anything for me? BTR says 580rwhp is the max, but I'm not sure if I believe that. I think that may be his ploy to help sell propane. What do you guys think?