the m4me (e4me for 1981) 800 cfm rochester quadrajet, unique to the 301 turbo, had super rich "dx" secondary metering rods and a remote vacuum source for the primary metering rod enrichment circuit; the "pevr" or power enrichment valve regulator. boost was regulated by a wastegate, and was delivered to dealerships with a standard factory limit set to 9 psi (+/- 1 psi), although measured real-world factory default settings ranged from around 7 to 10 psi. the wastegate could be safely user-adjusted to 15 psi by adding alcohol or water injection, or even higher with heavier modifications.