LZ9 ( 3900 ) cam specs?

[TR]

Hi, I saw the engine specs for the 3900 LZ9, which showed the cam lift ( at lobe ) but was wondering what the actual cam specs were in gearhead terms.

I was thinking along the lines of valve lift ( int/exh ) and duration ( int/exh ) and/or lobe center/overlap.

Thanks.

[Blackrider]

Re: LZ9 ( 3900 ) cam specs?

Hi, I saw the engine specs for the 3900 LZ9, which showed the cam lift ( at lobe ) but was wondering what the actual cam specs were in gearhead terms.

I was thinking along the lines of valve lift ( int/exh ) and duration ( int/exh ) and/or lobe center/overlap.

Thanks.

I've been looking for that for a wile. But no luck yet.

[Stevex]

this is going to be a hard one. your best luck is to remove one from an engine and have a cam company (comp cam) spec it out for you. I am pretty sure the aftermarket don`t even have core for this cam unless its a 3800 core gm is using.
your cam might be the same has the 3800 or not too far off. it will required a look at a stock car (g6) dyno sheet.

I can see Gm making another 40+hp hp on a 3900 motor with redesign intake/exhaust port (aluminum heads) , intake system and fuel management. are you guy running a wideband system for exhaust data or a four wire bosch sensor?.

[dre256]

Unfortinally GM hasnt offically released that info to my knowledge. Not many people have ripped a 3900 open to take accall specs or send it out for accual specs.

Another thing atleast up to 6months ago, GM hasnt released the LBS on the fuel injectors are on the 3900. Again no one is giving that info out. I e-mailed several GM places on this before and even AC delco and no one will say. All the responses when I do get responses is sorry for any inconvence but that infomation isnt avalible at this time. Just part numbers. If you have any problems please contact your dealership for assistance