Thanks, Mike. And to Jerry, for an earlier reply. Very clearly stated.
Now that I understand the difference, I can see a several possible
advantages to open deck:
1. easier to cast (fewer odd cores needed)
2. allows making the barrel of a different mat'l than the block,
and perhap allowing individual replacement
3. may allow better control of sealing forces by concentrating the
clamping load on the rim of the cylinder
THat said, closed deck seems like a generally beefier way to build a motor.
/Bill
> Closed deck vs. open deck refers to the construction of the block. The top
> of the block where the cylinder head bolts to the block is referred to as
> the deck. In open deck construction, the cylinders are attached to the
> block only at the bottom. When the head is off, you see the outline of the
> block an then you see the spigots of the cylinders standing proud, circular
> and un-attached to anything around them at the top. Frankly it looks kind
> of goofy if all you have seen is small block Chevys and older import blocks.
> A Chevy is a closed deck block, I believe that Acura Integra's are an open
> deck block Obviously the closed deck is stronger and more resistant to
> "ringing" but there are some advantages to the open deck too. I just can't
> remember what they are right now ;-)
> Mike Allendorfer,
> 96 Impala SS among others
> ----- Original Message -----
> From: Jesus Villarreal <jesvilla@gte.net>
> To: Bill Hamburgen 650-617-3329 FAX -3374 <billh@pa.dec.com>
> Cc: <ba-autox@autox.team.net>
> Sent: Thursday, May 03, 2001 12:24 PM
> 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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