INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

4.8 to 5.3

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Old 06-11-2016, 11:52 AM
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Originally Posted by 1FastBrick
Actually the 4.8/5.3/6.0 Block does exist But they are very rare and hard to find. I have never come across one But W2W and LPE have worked with them and documented there existance. There are a few pictures in the How to build LS1's Book. Page 115 and again on page 116 for example. You have to look close at the few pictures but it is there. W2W is long gone but you can contact LPE about them.
So i might contact LPE but figured you might be easier to reach first and since this popped after a search id ask, know anything more about these blocks now that you didnt back then in 2010? I picked up a bare block today and sure enough it has 6.0/5.3/4.8 all cast on it..
Mainly would like to know if the cylinder thickness is any bettter or worse im wanting to do a 370 with boost..
Old 06-11-2016, 12:09 PM
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Originally Posted by skolman91
So i might contact LPE but figured you might be easier to reach first, know anything more about these blocks now that you didnt back then in 2010? I picked up a bare block today and sure enough it has 6.0/5.3/4.8 all cast on it..
Mainly would like to know if the cylinder thickness is any bettter or worse im wanting to do a 370 with boost..
I do not, I have have yet to see one in person although I have been looking for one.

I almost bought a complete engine but I couldn't justify the price just to get the block.

What is the casting number on the block?

I believe I spoke with Jason Haines regarding this.

They wouldn't be any worse for boost that's for sure.
Old 06-11-2016, 12:15 PM
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Here is the CL add which has a few pics and numbers..
LQ4 engine block for sale
And yea i saw jason's name mentioned in an article on hot rod i found, sent him a pm on tech will see what he says if he responds..
Old 06-11-2016, 12:42 PM
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Interesting. Looks like the casting date indicates it may have been cast real early on.

I would still like to see some more detailed pictures of one.

Not a bad price for a standard bore block either.
Old 06-14-2016, 05:00 PM
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Sorry only 2 pics i took before i wrapped it up and sat it in the corner. Do all iron blocks not have the recess on the top back for the oil galleys, just two holes?

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Old 06-15-2016, 12:33 AM
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Thanks for the pictures! If you dig it out any time soon I would like some more.

I am not sure what you are referring to when you ask about "the recess on the top back for the oil galleys, just two holes?"

If you're asking if its just 2 oil galley holes in the back of the block, Yes. All the iron blocks are like that.
Old 06-15-2016, 07:51 AM
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Yea this pic shows what i was asking about
http://image.hotrod.com/f/79455172+w...-rear-face.jpg
Old 06-15-2016, 11:35 AM
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Originally Posted by skolman91
Yea this pic shows what i was asking about
http://image.hotrod.com/f/79455172+w...-rear-face.jpg
Yes, All the gen III Iron blocks are like that with just 2 holes.

Only the later LS1 or LS6 aluminum blocks received that pocket.
Old 04-27-2019, 04:26 PM
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Default Casting numbers

Does Anyone have block casting numbers for the early block stamped 6.0 4.8 5.3? Also would it be stamped the same on the front drivers side ?
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