2001WS6Vert

I won't respond after this...but. Why would GM make the change to the higher location in later designs? And why are people who are running 7 sec. 1/4s budget builds choosing LS2/3 blocks instead of LS1's? Is there a 7 sec. LS1? So, I disagree about your statement that, "it's always preferable to secure the stud at a lower location".

stevieturbo

Because the liners in the bores on an LS1/6 are ****.

Basically the LS2+ platform is a better block design.

Its not uncommon on some engines where the studs screw into the top deck, to drill on through and tap the lower regions to create a long stud setup on some smaller high powered engines.

And some other engines like Subarus are already threaded at the base of the block for its fasteners.

TheFallen

its not just LS2/Ls3 that run the shorter studs.

04+ plus blocks run the shorter studs, this includes the iron blocks as well

stevieturbo

Its maybe due to necessity with the larger bore sizes. Maybe just not room for a stud or bolt to go right to the bottom of the block. Or probably just cheaper, and the stock engine head gasket seals fine anyway.

TheFallen

or the fact that gm made it simpler and cheaper to have bolts produced that are all the same lenght.

fatmat80

i think its all in what ur budget has room for. In the recent past most people have moved on from the old reliable ls1 for ls2 and newer platforms. that is not to say that ls1 platforms are junk, there just have been more strides made in the 4 inch bore motors. i have seen both platforms make 700+ rwhp. so basicaly if you can afford a ls2 you do get a wider range high quality head design, and if you go with the ls1 platform you get a proven performer! and save a little coin.. Good luck with your decision and project!!