L92 Casting #'s - what's the diff?
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Teching In
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L92 Casting #'s - what's the diff? I'm looking at a couple different sets of L92 heads to put on a LQ4 6.0L, just wondering what the difference might be between the casting #'s ? ie. casting # 823 vs. 821 ? Is there a physical or performance difference? Is there a casting I should stay away from for any reason?
Thanks!
Thanks!
I'm looking at a couple different sets of L92 heads to put on a LQ4 6.0L, just wondering what the difference might be between the casting #'s ? ie. casting # 823 vs. 821 ? Is there a physical or performance difference? Is there a casting I should stay away from for any reason?
Thanks!
Thanks!
Andrew
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Joined: Apr 2008
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From: Right here, right now!
I'm looking at a couple different sets of L92 heads to put on a LQ4 6.0L, just wondering what the difference might be between the casting #'s ? ie. casting # 823 vs. 821 ? Is there a physical or performance difference? Is there a casting I should stay away from for any reason?
Thanks!
Thanks!
TECH Enthusiast
Joined: Jan 2010
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From: REALITY
I'm looking at a couple different sets of L92 heads to put on a LQ4 6.0L, just wondering what the difference might be between the casting #'s ? ie. casting # 823 vs. 821 ? Is there a physical or performance difference? Is there a casting I should stay away from for any reason?
Thanks!
Thanks!
823= L92/ Steel intake valve/ stock springs..
Some say the 821's have a smoother finish....
reality both are the same castings, and both had some not so smooth areas but in different locations.... Nothing crazy.... I did not even touch em(port em or polish em), I just popped em on... besides milling and spring kit....
Bozz
Is it #5364? I was thinking it was #3564. Either way the difference between these and the #823 are the #5364 were cast in green sand and have a smoother finish in the ports and combustion chambers. SLP grabs all of these smoother heads from production. I tried to get a set when I bought my #823's but they looked at me like I was stupid.
