Was wondering if you think an 871 is enough blower for a 586" blower moter. 8.8:1, it has fully ported pro1 345's, two 1150's done by pro systems, bullet cam .750 lift cant remember duration exacly but like [email protected] 050, lee intercooler. my problem is i cant get the rpms. took it out today 5900 at 5psi of boost. Use to run 6200 w 8psi of boost. boat has an agressor A. am i dreaming to think this thing should make 1100 to 1200 hp and i should see 6600 to 6800 rpms? My builder sid i should see about 6800 to 7000 rpm with an A cut.