I don't deny they're great engines. I just wish they weren't so much of a hassell to upgrade and put in your car. But that said, they're amazing powerplants and you can't beat the weight savings for competition.

I have built acouple Ls style engine's and they are no cheaper to build,and I think a little more to build than a SBC.

How many of use guy's on here are going to drive the car hard enough to notice having an alumunin block.And there's only 70 pd's differnet in a steel block and aluminum block.


I have never seen a Lsx engine in stock form rwph 400hp.the best i have seen was 348rhwp in a 01 vette.My zo6 didnt rw 400 and the Ls6 is the 2nd best Ls engine next a Ls7.

I am not saying there bad they are good engine's,but they aren't as cheap as people think.and IMO not worth changing out a current SBC set-up just for a LS

SBC's and BBC's aren't going anywhere, LSx's are just another option. Depending on what needs to be done to a car it may be logical to stick with the SBC's or BBC's but in other cases it might be reasonable to go with a LSx. It also depends on budget and personal taste. Someday (when I have more money :( ) I will get a LSx for my '56, but that is what I like and it makes sense because I have to have to fix/change things that the previous owner and time had done to the car anyway (motor mounts, radiator, gas tank, etc).

David

Doesn't look like the LS1 has a weight advantage. Even with an aluminum block.

Posted by Steve1968LS2:

457.6 lbs, LS1 auto; 497.2 lbs, LS1/LS6 manual

From Chevy2only; http://www.chevy2only.com/index.php?..._position=54:8

Weights are from carb to oil pan with HEI dist, harmonic balancer, and iron water pump.

SMALL BLOCK
All iron small block 520 lbs.
Alum heads w/iron small block 480 lbs.
All alum motor 389 lbs.

BIG BLOCK
All iron BB 754 lbs.
Alum heads with iron block 660 lbs.
All alum BB 501 lbs.