The L72/L89 iron head/aluminum head big blocks had closed chamber heads.
Example would be the 1969 L72 and L89 427's rated at 435hp with 3-2 bbl.
carbs.
L88's (aluminum heads) had open chamber heads. Example would be the 1969
L88 with rated at 430hp with a single Holly 4-bbl carb.
Rick Brown
rbrown7@pacbell.net
(408)737-1986
-----Original Message-----
From: owner-ba-autox@autox.team.net
[mailto:owner-ba-autox@autox.team.net]On Behalf Of Jesus Villarreal
Sent: Thursday, May 03, 2001 12:24 PM
To: Bill Hamburgen 650-617-3329 FAX -3374
Cc: ba-autox@autox.team.net
Subject: Re: "closed deck" vs. "open deck"?
Bill Hamburgen 650-617-3329 FAX -3374 wrote:
>
> I've read about "closed desk" and "open deck" motors but can't find
> a definition of what this means. Any takers? Thanks,
>
> /Bill
How about "open chamber/closed chamber". This applies to the chevy big
block combuston chamber on the heads. Early(65-68) 396-427 cu. in.
motors were closed chamber design, later hi performance 427-454's were
open chamber design.
Jesus
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