DarkCloud

I know im probably going to get **** for posting this, but i have had trouble finding any definite answers. I have always been under the impression that the ls2 is a better starting point (bare block vs bare block) than an ls6, due to the larger displacement, but upon browsing through various sites, i found the ls6 block tends to sell for more than the ls2 block.. So basically my question is.. why is this?? and is the ls6 a better block than the ls2 for some reason?

blocc monster

The ls6 is cheaper.

DarkCloud

anyone?

Mongoose WS6

on that note, i heard you cannot run the f-body OEM knock sensor on the ls2 and have to tap the side?
is this true

89LS1RS

iTrader: (1)

think ls2s have knock sensor location on the sides instead of valley.
and cam sensor relocated to the front cover.

i have a new ls6 block, but would trade it for a ls2 block

ChucksZ06

iTrader: (9)

Ls2 has some differences that I believe are better for performance. The larger bore is obvious cause it helps heads breath better and more displacement. I like the siamesed bores also which makes the block stronger and helps with cylinder distortion.

DarkCloud

see thats what i thought.. im just confused as to why lg motorsports has the ls2 listed for cheaper than the ls6.. i mean its only by like $150.... but i figured it would be the ls2 thats more expensive...

rjparth

I'm reading Motorbooks Workshop's book on LS engines right now so I can answer from that:

- Gen IV LS2 vs Gen III LS6
- LS2 uses a 4.000" bore, max 4.030" vs. LS6 3.898", max 3.910"
- LS2 camshaft sensor reluctor moved to the upper timing gear so it uses a different front timing cover and timing gear. Camshaft and knock sensor harness wiring extensions are available.
- LS2 knock sensors are on the external sides of the block vs. LS6 sensors under the intake manifold. Sensors aren't interchangeable.
- LS2 has provisions for DoD. LS2 lifter trays are required.

DarkCloud

Thank you very much!Which kinda helps along with my question.. The ls2 seems like its def. a better block.. so why would it be cheaper than an ls6 block.....

rjparth

Summit and Pace both have the LS2 priced slightly higher. Might just be a supply/demand issue depending on the vendor you look at.

kinglt-1

iTrader: (26)

because the ls6 block is getting alot harder to find these days...which is driving the price up on any that are still left out there= Supply and demand. last year sdpp was closing out there ls6 longblocks for 3200.00. Now I see them back up around 5k if you can find one.