2001CamaroGuy

iTrader: (6)

what are all the differences? I know the 6L has a solid center while the 5.7L is drilled. There was also something (if I remember correctly) about the legth of the rear section being longer and it causing problems with tranny mounting.

BLK02WS6

iTrader: (2)

The length is only an issue on the older ones (forgot the years, but someone will post up). If you are getting a new one, not an issue. The weight/strength/hole issue is one I've seen lots of answers on, and they all vary and sound like they have their points. I have one in my new motor that is on the way. Guess I'll see how it works out for me.

Country Boy

iTrader: (24)

Some complain about the weight, blah blah blah The extra weight is in the CENTER of the crank meaning its neutral and doesnt affect the throws.

2001CamaroGuy

iTrader: (6)

but it has to affect to engines abbility to speed up.....

LS171Malibu

the years that have the long/short(nonusable) rear are 2000 and earlier. I built an engine with an '01 6.0 crank and it runs great.. also, I had the rotating assembly balanced and the machine shop was impressed that it was so closs I'd never been able to tell. Pistons and rods were new OEM.

Country Boy

iTrader: (24)

Its neutral as its in the center. It doesnt affect anything. Kinda like the fair ride "Gravatron" if you guys have it. It an enclosed spaceship that spins in circles while you lay on the sides and theres a guy that sits in the dead center. Same deal

1999_SS_M6

Carl, I understand the point you're trying to make, but I don't agree with the physics. Mass is mass, and although the rotational mass we're talking about is dead center in the crank centerline, it still takes more effort on behalf of the engine to turn it, than if it weren't there at all.

Granted, the effect of the extra weight would be multiplied signigicantly as it moved out from the centerline, but just being in the centerline alone doesn't make it's mass=zero. I'm not trying to beat a dead horse. Even though there IS more mass, I don't think in this case it's going to matter to much when engine performance, or sluggishness is concerned, and in that respect, I agree with Country Boy.

mbaskett

Here's some threads where alot of the differences and similarities have been discussed:

https://ls1tech.com/forums/generation-iii-internal-engine/118105-crank-weights-6-0-vs-ls1.html
https://ls1tech.com/forums/generation-iii-internal-engine/119546-6-0l-crank-w-f-body-flexplate.html

Very good reading in both threads, especially the latter half of the second one..