Does anyone know the weight of a LS1 engine compared to an iron smallblock? Cant find info on that anyware, hope you can help me.

 

90lbs more for the iron Thats all I got.

 

LS1=91lbs
LS1 heads=20lbs each
iron block=183lbs

This according to the GM service manual. (Bare block and head castings)

Actually it is around ~92 pounds of extra weight

 

All your questions answered and more.

 

Cant read it.

 

Alum. Gen III V8 = 92.5 lbs.

Iron Gen III V8 = 210.4 lbs.

Alum Gen III Cyl. Head = 18.9 lbs.

Iron Gen III Cyl Head = 49.2 lbs.

 

hehe, I have Will Handzel's book "How to build high performance ls1/ls6 v-8's" and it says the aluminum LS1 is 103 but also says 107 lbs in another spot, and the iron blocks are about 88lbs more. the iron block is more sought after for performance, especially the 6.0L since you can bore it out and it's soooo much stronger, and bigger anyways. Think, it's designed for aluminum, but made out of Iron, it's ridiculously strong. the aluminum block is already strong as it is

 

Well, who to believe
I got mine from the GM official manual. At least we know the ballpark

 

i think the alum block BARE w/ out sleeves is 107 pounds. that came out of a similar book to will hanzels'. i forget the name of it. hold on i'll google it. it was EXTREMELY helpful to me when i put my new motor in.

 

chevy ls1/ls6 performance by christopher p. enders from HP books. i think that has more technical data that the "how to build a high perf. gen3" book.