5.3 lmg to 5.7 help
TECH Senior Member
Joined: Jun 2016
Posts: 22,298
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From: Central Cal.
Iron or aluminum block? The iron block can be bored to 5.7 specs, but I'm not sure the aluminum one can. Besides that, 5.7 pistons and rings are all you need. Call WS6store for this stuff. They'll give you a good deal and great service. They are a vendor/sponsor of this site. You will need a new tune after this, too.
TECH Senior Member
Joined: Jun 2016
Posts: 22,298
Likes: 3,619
From: Central Cal.
TECH Senior Member
Joined: Jun 2016
Posts: 22,298
Likes: 3,619
From: Central Cal.
They're good guys, and as long as you show that you're just not stringing them along they'll bend over backwards to help you. They know a lot of guys want to get a good idea of what to do in their heads before they cut loose with the long green, lol.
BTW, I hope you know that 799 heads are identical to 243's, so you know you already have pretty decent heads on that engine.
BTW, I hope you know that 799 heads are identical to 243's, so you know you already have pretty decent heads on that engine.
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Why are you starting so many many threads? Im sure i gave you all the info you needed in your original thread plus emails.
One thread will make it way easier to keep track of and use as reference for all of your questions.
As far as the 5.3 to 5.7 build goes, we have all the parts for less than a set of forged pistons. ALL of the parts.
The only thing youll need is a bore to piston size.
One thread will make it way easier to keep track of and use as reference for all of your questions.
As far as the 5.3 to 5.7 build goes, we have all the parts for less than a set of forged pistons. ALL of the parts.
The only thing youll need is a bore to piston size.
TECH Senior Member
Joined: Jun 2016
Posts: 22,298
Likes: 3,619
From: Central Cal.
Teching In
Joined: Sep 2018
Posts: 7
Likes: 0
From: Yakima, WA
I've been sincerely trying to avoid thread-jacking or making a whole new thread, but seeing as I have yet to get a definitive answer I'm going to ask it here....
I acquired an LM4 w/ 243 heads. It's an aluminum block 5.3L.
I want to do a "poor man's" LS1 by punching it out to 5.7L. My one question is.... Is it possible to do it safely without hindering reliability?
I acquired an LM4 w/ 243 heads. It's an aluminum block 5.3L.
I want to do a "poor man's" LS1 by punching it out to 5.7L. My one question is.... Is it possible to do it safely without hindering reliability?
I've been sincerely trying to avoid thread-jacking or making a whole new thread, but seeing as I have yet to get a definitive answer I'm going to ask it here....
I acquired an LM4 w/ 243 heads. It's an aluminum block 5.3L.
I want to do a "poor man's" LS1 by punching it out to 5.7L. My one question is.... Is it possible to do it safely without hindering reliability?
I acquired an LM4 w/ 243 heads. It's an aluminum block 5.3L.
I want to do a "poor man's" LS1 by punching it out to 5.7L. My one question is.... Is it possible to do it safely without hindering reliability?
Teching In
Joined: Sep 2018
Posts: 7
Likes: 0
From: Yakima, WA