WECIV

Did the GTO get the LS6 block or an LS1 block???

ChiefBrody

LS6, they stopped making the LS1 block at the end of 02 I believe. So all the new blocks are the LS6 design.

WECIV

Then why not just call it an LS6 (a detuned LS6)???

demonspeed

iTrader: (7)

Because it still has LS1 internals, heads, and cam.

ChiefBrody

They still call it an LS1 block because it still uses the LS1 internals.

WECIV

Out of stupidity (on my part) what are the differences in internals???

Deckhand

iTrader: (1)

the head design, cam specs, etc

DANSLS1GTO

As near as I can tell (still waiting for my car and haven't been able to confirm some of this) the gto has:
LS6 block
LS6 intake
LS1 Heads
An LS1 cam - but different than other LS1's - specs:
196/207 degrees duration at .050, .479/.467 lift, and a 116-degree LSA.
It also is supposed to have the updated pistons without the piston slap.

WECIV

"196/207 degrees duration at .050, .479/.467 lift, and a 116-degree LSA"

Out of sheer stupidity, what do those #'s mean???

DANSLS1GTO

http://www.ls1howto.com/index.php?article=23#camhelp

Here's a site that will explain a lot about cams. Searching some may find more. I'm by no means an expert.

WECIV

Thanks, Fan!

demonspeed

iTrader: (7)

Fbody LS1 cam '01-02:
198/197 intake/exhaust degrees duration
.466/.478 inches lift
115 LSA

WECIV

Thanks, for the info, Y'all. That site Fan gave really helped me out. Thanks again.