Thanks Rick and Jesus,
But assuming "open chamber" = "open deck", I still don't know what
these terms mean.
The question actually came up in a discussion of current Subaru flat-4s.
The 2.5 l motors are described as "open deck", while the 2.0 l WRX gets a
different motor/block combo described as "closed deck". The implication
is that "closed deck" construction is stronger.
Further clarification welcomed!
/Bill
> 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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