svg210

iTrader: (1)

hey guys, quick question

whats the weight diffrence between a 6.0 Aluminum LS2 and a 6.0 LQ9 Iron?

TIA

silverz28camaro

iTrader: (20)

I beleive its about 80lbs block for block.

silverz28camaro

iTrader: (20)

OK, just looked it up in one of the ls1/ls6 books I have and it said the ls1 is about 107lbs and the iron block is 88 more lbs.

silverz28camaro

iTrader: (20)

I don't see why the aluminum ls2 would be anything more lbs. then an ls1, still same structure with steel sleeves. And the later blocks post 99 i thhink had windage windows in the blocks, so maybe they are even lighter by a few ##'s?

svg210

iTrader: (1)

Thank you Very Much, SilverZ28!

I have heard people tell me there was a 300lb difference, and nearly scared me out of considering an Iron block for my build, In which I am currently in the research process.

silverz28camaro

iTrader: (20)

maybe is you were comparing the ls1 to and old 440 chrysler big block..LOL

some of the older lq9 or lq4's came with iron heads, whitch that would add another 50 on top of the 88, but thats still 138lbs. Most any motors now from gm all have aluminum heads, it must have been a budget thing in the earlier years.

svg210

iTrader: (1)

LOL or they probably gave the full assembled weigh of the Iron vs the bare block LS1

eseibel67

iTrader: (10)

This excerpt is from the "Anatomy of the GM LS1 V8" article:

"The block weighed just 48.85kg, some 48 per cent
lighter than an equivalent iron block"

I did the math:

Aluminum LS1 block: 107 pounds.
Iron equivalent: 207 pounds.

Similar ratio for 6.0l would apply.

claytonisbob

iTrader: (1)

That's assuming the casting is exactly the same, but I *thought* the aluminum blocks have a bit more material for strength.

PREDATOR-Z

I weighed my stock 01 LS1 shortblock Vs a 370 ci with stock crank and forged rods pistons. Difference was 92lbs

southpaw0314

iTrader: (5)

so if its only 80lbs why does everyone complain about the weight difference