An open deck engine is cheaper to manufacture, as the water jackets
around the cylinders are made by inserting a die that can be slid
straight out the top when the casting has cooled. When the head is off
of an open deck engine, you can see right down into the water jackets
all around the cylinders. This means that the cylinders are standing up
like cans, with little to support them. For highly modified Hondas,
they sell aftermarket blanking plates that fill all the open spaces at
the top of the cylinders serve to brace them from swaying and expanding.
A closed-deck Subary engine is made using the "lost styrofoam" (similar
to lost wax method) technique. When the head is off, you can see that
all the space between the cylinders is sealed off by a solid deck with
holes for the coolant passages, but otherwise solid. This method does
not allow for a casting die that can be retracted from the finished
casting and it requires a bunch of costly machining to achieve a
suitable mating surface for the heads.
The Subaru engines that were designed to be turbocharged have a number
of "bulletproofing features", such as an under piston oil spray system,
extra bracing of the crankshaft bearing areas, etc.etc. My son has a 98
Impreza RS with a Minnam Stage II kit and 5psi boost. He has already
lost a cylinder liner, because his 2.5 open deck engine was not built to
take the strain. That is one reason why I'm not interested in selling
one of my EJ20G engines, he will probably need one soon.
Bill Robinson
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Closed Deck Versus Open Deck
Moderators: Helpinators, Moderators
-
penty
Closed Deck Versus Open Deck
Thanks William I appreaciate the explanation, so which engine would my 92 UK 2L 4 cam Legacy turbo have ? and would it be Cast die or sand die ?
cheers
John
----- Original Message -----
From: William D. Robinson <mailto:vultureboy@mindspring.com>
To: BC-BFLegacyWorks@egroups.com
Sent: Sunday, November 19, 2000 8:17 PM
Subject: [BC-BFLegacyWorks] Closed Deck Versus Open Deck
An open deck engine is cheaper to manufacture, as the water jackets
around the cylinders are made by inserting a die that can be slid
straight out the top when the casting has cooled. When the head is off
of an open deck engine, you can see right down into the water jackets
all around the cylinders. This means that the cylinders are standing up
like cans, with little to support them. For highly modified Hondas,
they sell aftermarket blanking plates that fill all the open spaces at
the top of the cylinders serve to brace them from swaying and expanding.
A closed-deck Subary engine is made using the "lost styrofoam" (similar
to lost wax method) technique. When the head is off, you can see that
all the space between the cylinders is sealed off by a solid deck with
holes for the coolant passages, but otherwise solid. This method does
not allow for a casting die that can be retracted from the finished
casting and it requires a bunch of costly machining to achieve a
suitable mating surface for the heads.
The Subaru engines that were designed to be turbocharged have a number
of "bulletproofing features", such as an under piston oil spray system,
extra bracing of the crankshaft bearing areas, etc.etc. My son has a 98
Impreza RS with a Minnam Stage II kit and 5psi boost. He has already
lost a cylinder liner, because his 2.5 open deck engine was not built to
take the strain. That is one reason why I'm not interested in selling
one of my EJ20G engines, he will probably need one soon.
Bill Robinson
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cheers
John
----- Original Message -----
From: William D. Robinson <mailto:vultureboy@mindspring.com>
To: BC-BFLegacyWorks@egroups.com
Sent: Sunday, November 19, 2000 8:17 PM
Subject: [BC-BFLegacyWorks] Closed Deck Versus Open Deck
An open deck engine is cheaper to manufacture, as the water jackets
around the cylinders are made by inserting a die that can be slid
straight out the top when the casting has cooled. When the head is off
of an open deck engine, you can see right down into the water jackets
all around the cylinders. This means that the cylinders are standing up
like cans, with little to support them. For highly modified Hondas,
they sell aftermarket blanking plates that fill all the open spaces at
the top of the cylinders serve to brace them from swaying and expanding.
A closed-deck Subary engine is made using the "lost styrofoam" (similar
to lost wax method) technique. When the head is off, you can see that
all the space between the cylinders is sealed off by a solid deck with
holes for the coolant passages, but otherwise solid. This method does
not allow for a casting die that can be retracted from the finished
casting and it requires a bunch of costly machining to achieve a
suitable mating surface for the heads.
The Subaru engines that were designed to be turbocharged have a number
of "bulletproofing features", such as an under piston oil spray system,
extra bracing of the crankshaft bearing areas, etc.etc. My son has a 98
Impreza RS with a Minnam Stage II kit and 5psi boost. He has already
lost a cylinder liner, because his 2.5 open deck engine was not built to
take the strain. That is one reason why I'm not interested in selling
one of my EJ20G engines, he will probably need one soon.
Bill Robinson
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Gord
Closed Deck Versus Open Deck
Thzanks for the lesson Bill, i hope you don't mind i quoted you on "the Ultimate Subau Message Boads, some on asked if Subie turbos were any good.
boyo boyo boyo are they're not good their great
seeya
Gord
From: William D. Robinson <mailto:vultureboy@mindspring.com>
To: BC-BFLegacyWorks@egroups.com
Sent: Sunday, November 19, 2000 4:17 PM
Subject: [BC-BFLegacyWorks] Closed Deck Versus Open Deck
An open deck engine is cheaper to manufacture, as the water jackets
around the cylinders are made by inserting a die that can be slid
straight out the top when the casting has cooled. When the head is off
of an open deck engine, you can see right down into the water jackets
all around the cylinders. This means that the cylinders are standing up
like cans, with little to support them. For highly modified Hondas,
they sell aftermarket blanking plates that fill all the open spaces at
the top of the cylinders serve to brace them from swaying and expanding.
A closed-deck Subary engine is made using the "lost styrofoam" (similar
to lost wax method) technique. When the head is off, you can see that
all the space between the cylinders is sealed off by a solid deck with
holes for the coolant passages, but otherwise solid. This method does
not allow for a casting die that can be retracted from the finished
casting and it requires a bunch of costly machining to achieve a
suitable mating surface for the heads.
The Subaru engines that were designed to be turbocharged have a number
of "bulletproofing features", such as an under piston oil spray system,
extra bracing of the crankshaft bearing areas, etc.etc. My son has a 98
Impreza RS with a Minnam Stage II kit and 5psi boost. He has already
lost a cylinder liner, because his 2.5 open deck engine was not built to
take the strain. That is one reason why I'm not interested in selling
one of my EJ20G engines, he will probably need one soon.
Bill Robinson
To unsubscribe from this group, send an email to:
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boyo boyo boyo are they're not good their great
seeya
Gord
From: William D. Robinson <mailto:vultureboy@mindspring.com>
To: BC-BFLegacyWorks@egroups.com
Sent: Sunday, November 19, 2000 4:17 PM
Subject: [BC-BFLegacyWorks] Closed Deck Versus Open Deck
An open deck engine is cheaper to manufacture, as the water jackets
around the cylinders are made by inserting a die that can be slid
straight out the top when the casting has cooled. When the head is off
of an open deck engine, you can see right down into the water jackets
all around the cylinders. This means that the cylinders are standing up
like cans, with little to support them. For highly modified Hondas,
they sell aftermarket blanking plates that fill all the open spaces at
the top of the cylinders serve to brace them from swaying and expanding.
A closed-deck Subary engine is made using the "lost styrofoam" (similar
to lost wax method) technique. When the head is off, you can see that
all the space between the cylinders is sealed off by a solid deck with
holes for the coolant passages, but otherwise solid. This method does
not allow for a casting die that can be retracted from the finished
casting and it requires a bunch of costly machining to achieve a
suitable mating surface for the heads.
The Subaru engines that were designed to be turbocharged have a number
of "bulletproofing features", such as an under piston oil spray system,
extra bracing of the crankshaft bearing areas, etc.etc. My son has a 98
Impreza RS with a Minnam Stage II kit and 5psi boost. He has already
lost a cylinder liner, because his 2.5 open deck engine was not built to
take the strain. That is one reason why I'm not interested in selling
one of my EJ20G engines, he will probably need one soon.
Bill Robinson
To unsubscribe from this group, send an email to:
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Dave aka DLC/dackampf
Closed Deck Versus Open Deck
I'm going to make a minor correction but in reading Mike Shields'
explaination, Lost-Foam is very similar to die-cast.
All Closed-deck Subarus are Sand-cast.
Again, i'm going from what he's said, and that's a pretty good
source! I just hope i interpreted it correctly.
--- In BC-BFLegacyWorks@egroups.com, "William D. Robinson"
<vultureboy@m...> wrote:
> An open deck engine is cheaper to manufacture, as the water jackets
> around the cylinders are made by inserting a die that can be slid
> straight out the top when the casting has cooled. When the head is
off
> of an open deck engine, you can see right down into the water
jackets
> all around the cylinders. This means that the cylinders are
standing up
> like cans, with little to support them. For highly modified Hondas,
> they sell aftermarket blanking plates that fill all the open spaces
at
> the top of the cylinders serve to brace them from swaying and
expanding.
>
> A closed-deck Subary engine is made using the "lost styrofoam"
(similar
> to lost wax method) technique. When the head is off, you can see
that
> all the space between the cylinders is sealed off by a solid deck
with
> holes for the coolant passages, but otherwise solid. This method
does
> not allow for a casting die that can be retracted from the finished
> casting and it requires a bunch of costly machining to achieve a
> suitable mating surface for the heads.
>
> The Subaru engines that were designed to be turbocharged have a
number
> of "bulletproofing features", such as an under piston oil spray
system,
> extra bracing of the crankshaft bearing areas, etc.etc. My son has
a 98
> Impreza RS with a Minnam Stage II kit and 5psi boost. He has
already
> lost a cylinder liner, because his 2.5 open deck engine was not
built to
> take the strain. That is one reason why I'm not interested in
selling
> one of my EJ20G engines, he will probably need one soon.
>
> Bill Robinson
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explaination, Lost-Foam is very similar to die-cast.
All Closed-deck Subarus are Sand-cast.
Again, i'm going from what he's said, and that's a pretty good
source! I just hope i interpreted it correctly.
--- In BC-BFLegacyWorks@egroups.com, "William D. Robinson"
<vultureboy@m...> wrote:
> An open deck engine is cheaper to manufacture, as the water jackets
> around the cylinders are made by inserting a die that can be slid
> straight out the top when the casting has cooled. When the head is
off
> of an open deck engine, you can see right down into the water
jackets
> all around the cylinders. This means that the cylinders are
standing up
> like cans, with little to support them. For highly modified Hondas,
> they sell aftermarket blanking plates that fill all the open spaces
at
> the top of the cylinders serve to brace them from swaying and
expanding.
>
> A closed-deck Subary engine is made using the "lost styrofoam"
(similar
> to lost wax method) technique. When the head is off, you can see
that
> all the space between the cylinders is sealed off by a solid deck
with
> holes for the coolant passages, but otherwise solid. This method
does
> not allow for a casting die that can be retracted from the finished
> casting and it requires a bunch of costly machining to achieve a
> suitable mating surface for the heads.
>
> The Subaru engines that were designed to be turbocharged have a
number
> of "bulletproofing features", such as an under piston oil spray
system,
> extra bracing of the crankshaft bearing areas, etc.etc. My son has
a 98
> Impreza RS with a Minnam Stage II kit and 5psi boost. He has
already
> lost a cylinder liner, because his 2.5 open deck engine was not
built to
> take the strain. That is one reason why I'm not interested in
selling
> one of my EJ20G engines, he will probably need one soon.
>
> Bill Robinson
-------------------------- eGroups Sponsor -------------------------~-~>
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It's Easy. It's Fun. Best of All, it's Free!
http://click.egroups.com/1/9698/1/_/_/_/974701148/
---------------------------------------------------------------------_->
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-
Dave aka DLC/dackampf
Closed Deck Versus Open Deck
Look on the top of the block for a ###-type hash pattern. If you see
this anywhere, it's a closed deck.
--- In BC-BFLegacyWorks@egroups.com, "penty" <penty@n...> wrote:
> Thanks William I appreaciate the explanation, so which engine would
my 92 UK 2L 4 cam Legacy turbo have ? and would it be Cast die or
sand die ?
>
> cheers
>
> John
> ----- Original Message -----
> From: William D. Robinson
> To: BC-BFLegacyWorks@egroups.com
> Sent: Sunday, November 19, 2000 8:17 PM
> Subject: [BC-BFLegacyWorks] Closed Deck Versus Open Deck
>
>
> An open deck engine is cheaper to manufacture, as the water
jackets
> around the cylinders are made by inserting a die that can be slid
> straight out the top when the casting has cooled. When the head
is off
> of an open deck engine, you can see right down into the water
jackets
> all around the cylinders. This means that the cylinders are
standing up
> like cans, with little to support them. For highly modified
Hondas,
> they sell aftermarket blanking plates that fill all the open
spaces at
> the top of the cylinders serve to brace them from swaying and
expanding.
>
> A closed-deck Subary engine is made using the "lost styrofoam"
(similar
> to lost wax method) technique. When the head is off, you can see
that
> all the space between the cylinders is sealed off by a solid deck
with
> holes for the coolant passages, but otherwise solid. This method
does
> not allow for a casting die that can be retracted from the
finished
> casting and it requires a bunch of costly machining to achieve a
> suitable mating surface for the heads.
>
> The Subaru engines that were designed to be turbocharged have a
number
> of "bulletproofing features", such as an under piston oil spray
system,
> extra bracing of the crankshaft bearing areas, etc.etc. My son
has a 98
> Impreza RS with a Minnam Stage II kit and 5psi boost. He has
already
> lost a cylinder liner, because his 2.5 open deck engine was not
built to
> take the strain. That is one reason why I'm not interested in
selling
> one of my EJ20G engines, he will probably need one soon.
>
> Bill Robinson
>
>
>
> To unsubscribe from this group, send an email to:
> BC-BFLegacyWorks-unsubscribe@egroups.com
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this anywhere, it's a closed deck.
--- In BC-BFLegacyWorks@egroups.com, "penty" <penty@n...> wrote:
> Thanks William I appreaciate the explanation, so which engine would
my 92 UK 2L 4 cam Legacy turbo have ? and would it be Cast die or
sand die ?
>
> cheers
>
> John
> ----- Original Message -----
> From: William D. Robinson
> To: BC-BFLegacyWorks@egroups.com
> Sent: Sunday, November 19, 2000 8:17 PM
> Subject: [BC-BFLegacyWorks] Closed Deck Versus Open Deck
>
>
> An open deck engine is cheaper to manufacture, as the water
jackets
> around the cylinders are made by inserting a die that can be slid
> straight out the top when the casting has cooled. When the head
is off
> of an open deck engine, you can see right down into the water
jackets
> all around the cylinders. This means that the cylinders are
standing up
> like cans, with little to support them. For highly modified
Hondas,
> they sell aftermarket blanking plates that fill all the open
spaces at
> the top of the cylinders serve to brace them from swaying and
expanding.
>
> A closed-deck Subary engine is made using the "lost styrofoam"
(similar
> to lost wax method) technique. When the head is off, you can see
that
> all the space between the cylinders is sealed off by a solid deck
with
> holes for the coolant passages, but otherwise solid. This method
does
> not allow for a casting die that can be retracted from the
finished
> casting and it requires a bunch of costly machining to achieve a
> suitable mating surface for the heads.
>
> The Subaru engines that were designed to be turbocharged have a
number
> of "bulletproofing features", such as an under piston oil spray
system,
> extra bracing of the crankshaft bearing areas, etc.etc. My son
has a 98
> Impreza RS with a Minnam Stage II kit and 5psi boost. He has
already
> lost a cylinder liner, because his 2.5 open deck engine was not
built to
> take the strain. That is one reason why I'm not interested in
selling
> one of my EJ20G engines, he will probably need one soon.
>
> Bill Robinson
>
>
>
> To unsubscribe from this group, send an email to:
> BC-BFLegacyWorks-unsubscribe@egroups.com
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-
Dave aka DLC/dackampf
Closed Deck Versus Open Deck
Nevermind!
I was wrong, it is Lost-Foam!
Thanks Will!
--- In BC-BFLegacyWorks@egroups.com, "Dave aka DLC/dackampf"
<legacycentral@y...> wrote:
> I'm going to make a minor correction but in reading Mike Shields'
> explaination, Lost-Foam is very similar to die-cast.
>
> All Closed-deck Subarus are Sand-cast.
>
> Again, i'm going from what he's said, and that's a pretty good
> source! I just hope i interpreted it correctly.
>
> --- In BC-BFLegacyWorks@egroups.com, "William D. Robinson"
> <vultureboy@m...> wrote:
> > An open deck engine is cheaper to manufacture, as the water
jackets
> > around the cylinders are made by inserting a die that can be slid
> > straight out the top when the casting has cooled. When the head
is
> off
> > of an open deck engine, you can see right down into the water
> jackets
> > all around the cylinders. This means that the cylinders are
> standing up
> > like cans, with little to support them. For highly modified
Hondas,
> > they sell aftermarket blanking plates that fill all the open
spaces
> at
> > the top of the cylinders serve to brace them from swaying and
> expanding.
> >
> > A closed-deck Subary engine is made using the "lost styrofoam"
> (similar
> > to lost wax method) technique. When the head is off, you can see
> that
> > all the space between the cylinders is sealed off by a solid deck
> with
> > holes for the coolant passages, but otherwise solid. This method
> does
> > not allow for a casting die that can be retracted from the
finished
> > casting and it requires a bunch of costly machining to achieve a
> > suitable mating surface for the heads.
> >
> > The Subaru engines that were designed to be turbocharged have a
> number
> > of "bulletproofing features", such as an under piston oil spray
> system,
> > extra bracing of the crankshaft bearing areas, etc.etc. My son
has
> a 98
> > Impreza RS with a Minnam Stage II kit and 5psi boost. He has
> already
> > lost a cylinder liner, because his 2.5 open deck engine was not
> built to
> > take the strain. That is one reason why I'm not interested in
> selling
> > one of my EJ20G engines, he will probably need one soon.
> >
> > Bill Robinson
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I was wrong, it is Lost-Foam!
Thanks Will!
--- In BC-BFLegacyWorks@egroups.com, "Dave aka DLC/dackampf"
<legacycentral@y...> wrote:
> I'm going to make a minor correction but in reading Mike Shields'
> explaination, Lost-Foam is very similar to die-cast.
>
> All Closed-deck Subarus are Sand-cast.
>
> Again, i'm going from what he's said, and that's a pretty good
> source! I just hope i interpreted it correctly.
>
> --- In BC-BFLegacyWorks@egroups.com, "William D. Robinson"
> <vultureboy@m...> wrote:
> > An open deck engine is cheaper to manufacture, as the water
jackets
> > around the cylinders are made by inserting a die that can be slid
> > straight out the top when the casting has cooled. When the head
is
> off
> > of an open deck engine, you can see right down into the water
> jackets
> > all around the cylinders. This means that the cylinders are
> standing up
> > like cans, with little to support them. For highly modified
Hondas,
> > they sell aftermarket blanking plates that fill all the open
spaces
> at
> > the top of the cylinders serve to brace them from swaying and
> expanding.
> >
> > A closed-deck Subary engine is made using the "lost styrofoam"
> (similar
> > to lost wax method) technique. When the head is off, you can see
> that
> > all the space between the cylinders is sealed off by a solid deck
> with
> > holes for the coolant passages, but otherwise solid. This method
> does
> > not allow for a casting die that can be retracted from the
finished
> > casting and it requires a bunch of costly machining to achieve a
> > suitable mating surface for the heads.
> >
> > The Subaru engines that were designed to be turbocharged have a
> number
> > of "bulletproofing features", such as an under piston oil spray
> system,
> > extra bracing of the crankshaft bearing areas, etc.etc. My son
has
> a 98
> > Impreza RS with a Minnam Stage II kit and 5psi boost. He has
> already
> > lost a cylinder liner, because his 2.5 open deck engine was not
> built to
> > take the strain. That is one reason why I'm not interested in
> selling
> > one of my EJ20G engines, he will probably need one soon.
> >
> > Bill Robinson
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