Carterboi05

Im planning a ls swap but dont know which engine to go with cause i want to twin turbo it.

redtan

iTrader: (5)

Can't go wrong with either a 4.8, 5.3 or 6.0 low comp iron block.

The 4.8 will be the most reliable, while obviously the 6.0 will make more power on the same boost levels.

Blackpanther99

iTrader: (8)

Indeed^^ Either will get the job done.

What are your goals?

Transam9973

6.0 lq4 or lq9 for reliable power both have fairly low compression ratios

blue89irocz

Is the only difference between the LQ and LS motors iron and aluminum blocks? I am looking to also build a turbo motor for a third gen so Im curious

blue89irocz

Also would it be wise to buy a complete motor or just buy short block and build up. Not sure how heads flow or are aftermarket better?

A.R. Shale Targa

iTrader: (2)

You could get in good with the fellas @ Speed Inc.; They have done every
possible turbo combo. Jim Moran who tuned my Vette has a pair of GN twins
on an LQ9 in a plain black 70 Malibu...thing is quiet and runs like mid tens.
I believe he has worked there for quite a long time.

zracer323

iTrader: (12)

How much power are you trying to make and what is your budget. It's impossible to answer your questions without knowing these two things.

LS-ONE_DAY

I'd say a 5.3 or 6.0 iron block. Yes the LQ are the iron truck blocks...99% sure that is the major material difference between the LQ and LS

bears416

4.8s have been proven to laugh at stupid amounts of boost stock and are a dime a dozen im bettin a 4.8 in youre case would be a good route

Blackpanther99

iTrader: (8)

OP never came back in... Lol