3900 V6 Info also 6spd manual

[KnightZeroOne]

Ok im looking at swapping to a bigger motor from a 3.1 trying to get some info on the 3900 V6 in the G6. Has anyone worked with these yet. I know its a relatively new motor, just trying to decide if i would be better going with a 3400 or 3500. Main main questions are Does the 3900 have an aluminum block. I plan to build this motor from the ground up and an aluminum block is desirable. Also I have a 5 speed manual now. What 6 speed fwd trans are available? I know the G6 has an available 6 speed, but i havent really seen it available before in a fwd gm car.

The car to be modified is a 1994 Chevy Cavalier Z24 Convertable
Current setup is a 3.1 MPFI and 5spd Trans, Right now the rough plan is going to a built 3900 60° V6 with turbo's and a 6 spd any input is appreciated

[bszopi]

I'd say start here...

http://www.60degreev6.com/showthread...highlight=3900

And then here...

http://www.60degreev6.com/showthread.php?t=37640

[Superdave]

the 3500 non VVT is an easier swap, there is even a front mount for the Jbody in the design stages for that specificially. With a few upgrades it'll out-perform that 3900.

there are only 4 running 3500 swapped Jbodies known right now.. and 2-3 more in progress.

[Nightingale]

The 3900 is still has the iron block I believe. Also no one that I know of has swapped a 3900 into anything yet. I have one coming but I plan to rewire the car for the g6 equipment since no one has a working solution for the vvt other then locking in the cam phaser at the desired timing, altough Joseph Upson is working on a standalone using a basic stamp I believe.

[KnightZeroOne]

Thanks much, gotta do some research i know they made an alum block for these

[bszopi]

There is a GM Performance aluminum block that you can buy for ~$3k. But it won't really support any of the hardware from the 3900. There is also the new 3.6DOHC that is an aluminum block.

[Joseph Upson]

The 3900 is still has the iron block I believe. Also no one that I know of has swapped a 3900 into anything yet. I have one coming but I plan to rewire the car for the g6 equipment since no one has a working solution for the vvt other then locking in the cam phaser at the desired timing, altough Joseph Upson is working on a standalone using a basic stamp I believe.

It was also mentioned in the 3900 thread that resizing the pre 3900 cam journals to install non VVT cams is an option. CNCGuy took that route.

[KnightZeroOne]

Interesting, though i dont think the 3600 dohc will fit in the engine compartment