engine differances

**02fbody35th** · 06-09-2008, 07:36 PM

this might be a stupid question but i am curious, what is the differance between GMs LS1,LS2,LS6,and LS7 engines if anyone knows please explain it to me, also is it possible to bore out a 350 engine to a 427. thanks

**Mr. Luos** · 06-09-2008, 07:59 PM

LS1 - 346 cubes
LS6 - 346 cubes (same basic block as the LS1, with some added features and better flowing heads and larger cam)
LS2 - 364 cubes
LS7 - 427 cubes

You don't want to bore out the LS1's without sleeving. Even then, it requires stroke and bore to get to 427.
Sleeves are very expensive.

**02fbody35th** · 06-10-2008, 02:25 PM

thanks man! good explanation, i knew it wasn't that hard to understand but just didn't know

**SVG210** · 06-10-2008, 04:38 PM

Originally Posted by Mr. Luos

LS1 - 346 cubes
LS6 - 346 cubes (same basic block as the LS1, with some added features and better flowing heads and larger cam)
LS2 - 364 cubes
LS7 - 427 cubes

You don't want to bore out the LS1's without sleeving. Even then, it requires stroke and bore to get to 427.
Sleeves are very expensive.

so Mr Luos you mean the Ls1 and 6 are the same block? Cool thanks man you just saved me about 5K, i was thinking of buying the crate engine but i use that money to beef up the bottom end.

**Mr. Luos** · 06-10-2008, 04:39 PM

Originally Posted by hurraquio

so Mr Luos you mean the Ls1 and 6 are the same block? Cool thanks man you just saved me about 5K, i was thinking of buying the crate engine but i use that money to beef up the bottom end.

They are very similiar.
The LS6 block has better oiling and cooling passages.

**SVG210** · 06-10-2008, 04:53 PM

Ohh I left that out but with those 5K i saved I can easily upgrade that on my Ls1 No?

sorry to hijack but utimiately I want to FI it wether it be a procharger or an APS kitt. Im looking at beefing up my current block, or buying the LSX block and building it from there.

**98 Stang Killer** · 06-11-2008, 04:12 AM

Why when you look up parts for the ls1 it always says 99-02 whats the main difference in the 98 that makes it different

**INMY01TA** · 06-11-2008, 07:19 AM

Originally Posted by 98 Stang Killer

Why when you look up parts for the ls1 it always says 99-02 whats the main difference in the 98 that makes it different

Main difference is the perimiter valve cover bolts. But here are most all differences.
http://www.ls1tech.com/forums/showpo...80&postcount=2

**98 Stang Killer** · 06-11-2008, 07:28 AM

Thanks man i appreciate it gets annoying looking for shit and im limited compared to 99 and up on programmers and control modules

**Mr. Luos** · 06-11-2008, 08:09 AM

Originally Posted by hurraquio

Ohh I left that out but with those 5K i saved I can easily upgrade that on my Ls1 No?

sorry to hijack but utimiately I want to FI it wether it be a procharger or an APS kitt. Im looking at beefing up my current block, or buying the LSX block and building it from there.

If you don't forge the internals, they are basicly the same strength. Block wise, the aluminum LSx blocks can handle a ton of power when built correctly.