Why is the fuel injected 454 only 310 horse power? When the fuel injected 350 is 300..just wondering?

Basically, it's a very under stressed big block, designed to run.... well.... forever. It's basic function in life is to provide a lot of torque at low revs, and have minimal maintenance. Small ports, small cam, and low compression give the 310 a long life span.


Darrell.

The 310hp version is called the 7.4. It has a lot more torque than the 300hp/350. It is low powered with longevity and low maintenance in mind. Most of the 7.4's have 2 bolt mains and cast internals.

The 454 magnum mpi has 385hp. They have 4 bolt mains and forged internals.

Heads up! i just went through a set of gen 6 310 hp for a friend..they were 4 bolt mains..

Thats why I said "most"

Actually, I think a lot of the Gen VI's are 4 bolt.

I agree everyone i have seen have been 4 bolts..the 310 hp version are gen 6 from what i have delt with..

so what your sayin is that the 454 carb motor that was in my buddies baja that I think im buyin will run better then the fuel injected 454 that he wants to put in it?

There are several different versions of BBC, with the 454 there have been carb versions anywhere from 330 to 365 HP (mag) at the crank. The fuel injected engines had to versions 310 and 385 HP (mag) at the prop. Or you can build your own and make whatever you want.

they made a 320hp 350 for a few years I have them in my boat all forged internals and 4 bolt mains

Fixall, wat did you have to do to your buddies 7.4? Did you leave them stock?