So whats the strongest aluminum block?

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Dec 23, 2015 | 05:56 PM

#41

speedtigger

Old School Heavy

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From: Florida

Quote:

Originally Posted by jleews6

Whats everybody's opinion on this? I know the 5.3 has the thicker sleves but what about the LS3 or LS2 block?
Thanks

My money is on the new Dart LS Next full skirt block.

Last edited by speedtigger; Dec 23, 2015 at 06:14 PM.

Dec 17, 2017 | 11:29 AM

#42

cool breeze

Staging Lane

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After reading thru this theres a lot of talk about which is the best block to upgrade.
What about which is the strongest oem shortblock to add tons of boost thru?
Looking at finding them thru the pullnpay, ive seen many lm7's, a lq4 and now there is the occasional lm4 but those are gen3.
But i wouldnt mind buying a gen4 off ebay thats ready to go for 1000+whp. What is the strongest gen4 bottom end thats not an ls9 or ls3 aka $$$$?

Dec 17, 2017 | 01:14 PM

#43

Dian

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Joined: Nov 2016

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From: switzerland

can somebody enlighten me why the a319 would be a better alloy than a 356?

imo its cheaper and inferior, also hard to machine. as to higher rigidity, complete bs, all aluminum alloys have about the same modulus.

Dec 19, 2017 | 12:20 PM

#44

No Juice

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From: Minnesota Corn Fields

Quote:

Originally Posted by gnx7

The LS9 block is superior mainly due to the clamping force of the head bolts. 120 ft/lbs with ARP 12mm bolts can contain much more cylinder pressure than a 5.3. It is also cast from a better grade aluminum, billet main caps, plus piston squirters which evens out the temps in them vs more heat in the center without. Lastly you can run a larger valve being 4.065" bore.

Is this the same with the LSA blocks? Do they also have the 12mm head bolts?

Dec 19, 2017 | 12:56 PM

#45

truckdoug

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From: Portlandia

Quote:

Originally Posted by Dian

You answered your own question. 319 is cheaper.

Dec 19, 2017 | 01:01 PM

#46

Dian

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From: switzerland

so, urban legend or what? (i might be missing something after all.)

May 13, 2018 | 08:07 PM

#47

Dead Hook

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Joined: Dec 2010

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From: So Cal

Quote:

Originally Posted by rotary1307cc

Late 5.3 aluminum much stronger than ls3

What is considered a Late 5.3 aluminum block? I'm looking at a 2013 Aluminum 5.3 with plans for boost. Will this block and stock internals hold up to 800rwhp?