At idle it's 30psi, and when I step on it, the guage spikes to about 38psi and looses about 2 psi above 5000rpm. My engine combo is in my sig. Will I gain much power by increasing FP to say 40? The car seems to pull good down low but not like it should at high rpms, especially in 3rd and 4th gear. Any input would be great.