mike tkach

iTrader: (3)

you guys with prochargers,what size engine do you have,which procharger unit are you running and how much boost are you making?im mainly wanting responses from pump gas users.

sppbler222

502mag mpi
M-3 Procharger
5 1/2psi with 4 1/2 pulley and 30 pitch prop.

CNC

572
M-4 Procharger
13 lbs on 93
MEFI

tcnomoney

what horsepower does your 572 make

Griswald

509 MPI, M1, 5-6lbs

articfriends

iTrader: (1)

540 w m-3 sc, with 3.85 pulley I dynoed at 12-13 lbs of boost on 92/93 octane pump gas (1057 hp), run 14 lbs with 20% race gas with 3.70 pulley (1115 hp). With these smaller pulleys it makes boost EARLY and FAST too if you lean on it anywhere above 3000-3200. It also made about 10-11 psi with 4.00 pulley and just over 1000 hp, Smitty

mike tkach

iTrader: (3)

smitty,what would you concider maximum boost with 93 pump gas?

articfriends

iTrader: (1)

IF a Prochargerd marine motor has EFI, afr's verified/tuned on water at wot, aluminum heads and compression close to or around 8-1 along with 75-80 MAX degree lake water for innercooler 12-13 lbs is easily reliable, I have ran that kinda boost for quite a while and haven't hurt a motor yet, Smitty

mike tkach

iTrader: (3)

12 or 13 is what i was thinking,that is what i run with my 8.3L whippled 588s.

Turbojack

Had, 540, M4, 10 lbs, fast efi, Boat was sold from person I sold it to. He or I did not have any motor problems.