Lurius

iTrader: (7)

Alright, I was reading this book on ls1s/ls6's and they mention that the gen 3 truck blocks have different crankshafts. nearly identical excet the rear end of it is larger than the ls1/ls6 models. When building up a truck engine to be mounted in a truck, could I use any ls1 crank or do I have to use the ones meant for the trucks? Only one I could find to fit a 5.3l block on summit was $1050.. way more than the 400$ scat forged cranks. Anyone know what the deal on this is?

Thanks!
-Lurius

ArcticZ28

iTrader: (14)

The pre-2002 truck engines had a different crank like you stated. Any of the newer ones are the same as the LS1's.

Randy WS6

iTrader: (69)

The truck cranks are call heavy cranks and the 5.7 ls1 are gun drilled witch is called a light weight crank

Rhino79

iTrader: (7)

The 99-00 model 6.0l cranks and 4.8l manual transmission cranks ad the wider flange at the rear. The 99-00 6.0l crank was designed for use with the 4l80e. The 5.3 cranks are the same as the ls1's except for the ls1's are gun drilled as stated above. The 01-present 6.0l cranks are the same as the Ls1's but the bobweights are heavier to compensate for the heavier pistons. And the 01-newer 4.8l cranks are the same in stucture as the ls1's they have a stroke of 3.267.

Lurius

iTrader: (7)

So then I could use an LS1 crank in an 02 5.3l block? I was worried because all I found listed under 5.3L was one for $1050 on summit lol, im loking more 400$-500$ range

Thanks guys,
-Lurius

Rhino79

iTrader: (7)

Sure can!

The stunningman

iTrader: (47)

wouldn't that also require balancing?

orangeapeel

iTrader: (18)

Yeah, that 1050.00$ is for a forged one.

Cop Car

iTrader: (14)

yes, but its the same stroke as the 02 5.3 crank... why would you change it?

Lurius

iTrader: (7)

Not going with stock stroke, was just checking on interchangability of aftermarket cranks. I'll likely be going with a 4".

-Lurius

Cop Car

iTrader: (14)

dont start with a 5.3 block, that would be a huge mistake

spend an extra couple hundred bucks and get a 6.0 block

Lurius

iTrader: (7)

Ive heard it was a pretty good block to work with. Im not going too crazy with the engine, just looking for more power, and the capacity to spray a little more.

-Lurius