LS1 vs LS6 block

**UKXK189** · 07-25-2007, 11:26 AM

So I know that some of the '01's and '02's came with LS6 blocks. Is there any performance differences with those cars and how can you tell if yours is one of them?

**Rhinohuey** · 07-25-2007, 11:43 AM

1168 is the last 4 digits of the LS6 block casting number. I don't think there were any performance differences between the LS1 and LS6 block, except that the LS6 block was supposedly stronger or something.

**2001NBMZ28** · 07-25-2007, 11:49 AM

Yup, the casting number on the LS6 is 12561168 - driver's side deck, above the transmission flange.

**shady milkman** · 07-25-2007, 11:50 AM

the ls6 block had bigger windows for oil circulation at high gs and ect. that is about the gist of things

**greatwhiteZ28** · 07-25-2007, 01:48 PM

since the ls6 motor was made in mexico, i have some mexican labels on some tape around my motor does that mean i have it

**greatwhiteZ28** · 07-25-2007, 01:49 PM

i also heard that the ls6 block is darker then the ls1

**Hot Black Trans-Am** · 07-25-2007, 01:54 PM

Originally Posted by greatwhiteZ28

i also heard that the ls6 block is darker then the ls1

I guess it got a tan in mexico.

There are circles on the front of the block on the flat part under the passenger side head for the LS1 block and none for the LS6 block.

**35thAnniZ28** · 07-26-2007, 12:36 AM

Originally Posted by greatwhiteZ28

since the ls6 motor was made in mexico, i have some mexican labels on some tape around my motor does that mean i have it

my block is a wetback

**INMY01TA** · 07-26-2007, 05:47 PM

makes no difference

**greatwhiteZ28** · 07-26-2007, 05:50 PM

Originally Posted by 35thAnniZ28

my block is a wetback

lol, they take our jobs now engine blocks.....

**shady milkman** · 07-27-2007, 06:45 AM

Originally Posted by INMY01TA

makes no difference

**ntimid8r** · 07-27-2007, 07:16 AM

Originally Posted by shady milkman

the ls6 block had bigger windows for oil circulation at high gs and ect. that is about the gist of things

Correct answer!!! Wow Shady, you surprise me that you actually know some technical stuff.

Originally Posted by Hot Black Trans-Am

There are circles on the front of the block on the flat part under the passenger side head for the LS1 block and none for the LS6 block.

Also correct sir.

**shady milkman** · 07-27-2007, 08:00 AM

Originally Posted by ntimid8r

Correct answer!!! Wow Shady, you surprise me that you actually know some technical stuff.

oh rich you know i know tech stuff.

**patricksd** · 07-27-2007, 08:54 AM

I had read on a sticky that there was no performance difference between the LS1 and LS6 block. However (the person who made the sticky) said that some engine builders believe the LS1 block is stronger for build-ups.

I'll see if I can find the post.

**shady milkman** · 07-27-2007, 08:56 AM

Originally Posted by patricksd

I had read on a sticky that there was no performance difference between the LS1 and LS6 block. However (the person who made the sticky) said that some engine builders believe the LS1 block is stronger for build-ups.

I'll see if I can find the post.

**INMY01TA** · 07-27-2007, 03:05 PM

Originally Posted by ntimid8r

Correct answer!!! Wow Shady, you surprise me that you actually know some technical stuff.

Blah, blah blah, heard that before.

**INMY01TA** · 07-27-2007, 03:06 PM

Originally Posted by patricksd

I had read on a sticky that there was no performance difference between the LS1 and LS6 block. However (the person who made the sticky) said that some engine builders believe the LS1 block is stronger for build-ups.

I'll see if I can find the post.

I've heard this before as well. Both have advantages/disadvantages. Like I said before, makes no difference

**patricksd** · 07-27-2007, 03:15 PM

Originally Posted by shady milkman

Its on the "other" LS1 forum lol

**secondgearscratch** · 07-27-2007, 03:17 PM

Originally Posted by Rhinohuey

1168 is the last 4 digits of the LS6 block casting number. I don't think there were any performance differences between the LS1 and LS6 block, except that the LS6 block was supposedly stronger or something.

weaker actually with the bay to bay oil passages. or so ive heard. no real difference, and i wouldnt go out of my way to find one.

**SScott** · 07-27-2007, 08:04 PM

Originally Posted by secondgearscratch

weaker actually with the bay to bay oil passages. or so ive heard. no real difference, and i wouldnt go out of my way to find one.

Why would they put a WEAKER block in the Vette LS-6? Just doesn't make sense to me. Yeah we have the halo chevy vette zo6 top dog hey I know lets put in a weaker block. I could be wrong, whatever.