Small Block & Big Block Chevy Specific - 8.1 liter

:read: Do anyone know if the 8.1L vortec come with a forged crank and pistons

Well no response so I'll post my guess - I don't see why it would. Its a stump puller, cast iron can easily handle what its designed to do.

From the interwebs:


The "first" marine 8.1L 496's came with a forged crankshaft... They later changed to a cast crank... Cant remember if it was just on the H.O version or not, but for sure there was a forged steel one made and run in production for the marine engine in the Mercruisers for a while


http://www.nautic-motors.fr/Engines.html

Look's like it was only the boat-moters that got forged crankshafts in the 8.1L. The L21 did get forged crank/pistons however.

L21 = 7.4L = electronic throttle coil near plug M.P.I. 454

L21 = 7.4L = electronic throttle coil near plug M.P.I. 454

And? Could it be the OP maybe misheard which motor came with the forged assembly and I was throwing it out as to maybe clear it up for him?

http://www.ls1tech.com/forums/small-block-big-block-chevy-specific/794968-8100-vortec-lets-talk.html

There's a good thread thats on this forum even haha.

Why buy a 8.1 truck engine?
Its a better idea to get a standard deck height 454 and go from there.
If I am not mistaken the 8.1 is a tall deck block which cost more to build and could cause a lot of problems depending on the car its going in. Just my 2 cents..

As far as it being forged I doubt if they are. Not meant to exceed 6000 rpm so there is no need from the factory.

Are you wanting to build off one or just asking?

Why buy a 8.1 truck engine?
Its a better idea to get a standard deck height 454 and go from there.
If I am not mistaken the 8.1 is a tall deck block which cost more to build and could cause a lot of problems depending on the car its going in. Just my 2 cents..

As far as it being forged I doubt if they are. Not meant to exceed 6000 rpm so there is no need from the factory.

Are you wanting to build off one or just asking?

Gen VII engines are their own animal (they're all metric too, iirc). I would go for a Gen VI or Mark IV to build.

You should investigate the connecting rod options before going very far with this, I believe the stock rods use 10 mm rod bolts.

After reading the thread I posted I would stay away from that 8.1L as well.. heck you can even use a Gen 5 block if you can't find a Gen 6. The gaskets for mounting older/newer heads is the same cost as regular ones and it works fine.