what are the differences in 3.1/3x00 crankshafts?

[no_doz]

throughout the different years what are the differences between crankshafts throughout the years?

i looked on the family tree & in the old articles & didnt come up with anything, so what are the changes/differences between cranks throughout the years?

[IsaacHayes]

3.1mpfi and 3100/3400. No difference. I think even the 3.4L RWD camaro motors and maybe the 3.1's were the same if those motors had DIS (which means they'd have the reluctor for the CPS)

[Superdave]

gen2 3.1, 3.4 DOHC, 3.4 (Camaro), 3100 and 3400 all have the same cast iron "981" crank.

[IsaacHayes]

Oh yeah the DOHC. Yeah it was shared between a lot of motors.

[no_doz]

i heard something about some of the 3x00 cranks being aluminum, is this true?

[IsaacHayes]

uhm... no.

[robertisaar]

i heard something about some of the 3x00 cranks being aluminum, is this true?

absolutely not.

[Superdave]

yah, that would last about 30 seconds.. haha

[no_doz]

thats what i was thinking, so would the steel crank from a 3500 be stronger than the cast iron cranks used in all the other 3x00's? and is it true that the TGP cranks arent any different?

[robertisaar]

forged cranks are stronger, there is no denying that...

TGP: same crank. refer to above statements...

[pocket-rocket]

throughout the different years what are the differences between crankshafts throughout the years?

i looked on the family tree & in the old articles & didnt come up with anything, so what are the changes/differences between cranks throughout the years?

They are in different blocks (with the forged cranks being the exception)

[no_doz]

did any of the 60* engines come with a forged crank?

[pocket-rocket]

Most of the 3500's did. I've heard of a small amount getting cast iron cranks instead of the forged steel cranks, though. I don't remember if the VVT 3500 and the VVT 3900 are forged steel (I imagine they are).

[Superdave]

the TGP crank is different, still a cast iron crank though.

the 3500 crank won't work in the older blocks without alot of clearancing to the block and/or machine work to the crank. But yes, it's forged steel (the 7484 casting).

[1988GTU]

the TGP crank is different, still a cast iron crank though.
.

How have you determined that info to be true?