When you start to go past 20 psi boost, you are going to max out your fuel supply system. Some members get by with a fuel pressure regulator and pressure boost to about 66 psi. Some do not, probably due to location, atmospheric differences, etc. The problem is that at max boost with OE fuel system, the duty cycle of the stock injectors is extreme. Best answer is SL55 pump, adj. regulator and 550cc injectors, not all that much $ all in all. Good insurance to avoid catastrophic disasters.