Pics of a real 3900

[Manitcor]

Just figured you guys might be intrested in seeing some pics of a 3900 actually installed in a car. I went to the New England Auto Show this weekend and they had a new G6 GTP sitting in the Pontiac booth, sure enough a 3900 was tucked under the hood.


More Pics Here: http://www.mymonte.com/gallery/thumbnails.php?album=3

Looks like this car is equipped with the new GM Lan hardware Notice the odd looking PCM module mounted to the front of the combination power distro center/battery box. Im not sure if that is the actual PCM (certainly possible) or some sort of daughter module.

[Guest]

RE: Pics of a real 3900

That looks like the actual PCM, they are tiny now. Most of the time I see them mounted on the firewall lately.

[sharkey]

RE: Pics of a real 3900

however being a gm, it wouldnt be mounted on the firewall, it would be mounted on the "bulkhead" (gm doesnt use the word "fire". l67 dont catch fire, they have a thermal event)

its actualy common to see a pcm mounted in the airbox aswell, as its good for cooling. that is either a pcm or could even be an ABS module.

[Hemet8]

So.......................when is somebody goona shove that into a J body? N body? W body? Anybody???

[burn]

At the JCO bash back in June GM Canada brought a new GXP. Infact they released the car to the public at the show. Here are some pics I took of the car:

http://j-body.derk.ca/?path=Burn%2F%2FBash%202005&img=IMG_1569.JPG

http://j-body.derk.ca/?path=Burn%2F%2FBash%202005&img=IMG_1570.JPG

[sharkey]

i thought the gxp was the 5.3l v8 fwd grand prix. i thought the 3900 6 speed was the new gtp.

mabey im completly wrong though

[Hemet8]

So can I shoehorn that thing in my '95 GA? Or maybe the 3500? Has anybody thought of using the 3900 crank and such on a 3400 block, so we could get a "stroker" engine??

[sharkey]

the 3500 and 3900 motors are a bunch different than the 3100/3400. the cranks wont just bolt in, and they are using a bunch of newer technology on them.

as for a complete swap, its possible i guess, one big thing would be overcomming the 56x reluctor wheels for the crank trigger (3400 and older uses 7x). other than that, i cant see many other huge issues for swapping, as the computer should be able to run everything else. mounts would be an issue, aswell as you would have to use the 6 speed (like thats a big downside) as it doesnt use a small gm bolt pattern.

[Manitcor]

you can poetentially swap in the older 3500 (the ones without VVT 05 and earlier) into a 3100/3400 however the newer ones would be a more difficut but not impossible swap. Due to things like electronic throttle, the new GMLan standard PCMs, etc.

[Hemet8]

How about taking a 3500 from the block down and putting a 3100/3400 modded top end on it? Are the crank, cam, sensors the same? If not, can you just take the 3100/3400 sensors and bolt them on top the 3500 block? Nobody has a 3500 in their car............................yet.

[matt_p]

you can poetentially swap in the older 3500 (the ones without VVT 04 and earlier) into a 3100/3400 however the newer ones would be a more difficut but not impossible swap. Due to things like electronic throttle, the new GMLan standard PCMs, etc.

You guys need to get this straight. There are TWO 3500's. Well the third is a minor difference. There is no older and newer 3500.


The LX9 which is the 3500 based off of the 3400.
3.70" bore x 3.31" stroke(213ci). No VVT. Has 24X reluctor wheel

The LZ4 which is based of the 3900.
3.90" bore x 3.00" stroke (214ci). Has VVT. Has 58X reluctor wheel.. No EGR. U-flow coolant design. Piston cooling oil jets.

And the LZE is the LZ4 but is E85 fuel capable.

Those are the 2006 engines.

edit: updated with new reluctor wheel info

[SappySE107]

Im pretty sure the one based off the 3400 came out a year before the other.

[matt_p]

Yes. The LZ4 is new to 2006. The LX9 has been around since 2004.

[bszopi]

Yes. The LZ4 is new to 2006. The LX9 has been around since 2004.

Hence Manitcor's reasoning behind the old and the new...

[Manitcor]

^^
werd

you can poetentially swap in the older 3500 (the ones without VVT 04 and earlier) into a 3100/3400 however the newer ones would be a more difficut but not impossible swap. Due to things like electronic throttle, the new GMLan standard PCMs, etc.

People should try reading a post all the way through before jumping me