
RE: Beginners question sorry
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RE: Beginners question sorry
- From: William Harrison <bbjt3@xxxxxxxxx>
- Date: Wed, 16 Dec 2009 08:38:19 -0800 (PST)
All this talk about poly motors has me regretting putting a 383 in my 65 Coronet 2 dr post.
I still have the poly motor that I took out and have promised the cam to Gary P.
If anyone wants something else, let me know.
It has sat for over 2 years with no cover on it so I don't know what the pistons or cylinder walls look at.
It ran very good when I removed it.
Later
Bill
--- On Tue, 12/15/09, Rich Kinsley <rlkinsley@xxxxxxxxx> wrote:
> From: Rich Kinsley <rlkinsley@xxxxxxxxx>
> Subject: RE: Beginners question sorry
> To: 1962to1965mopars@xxxxxxxxxx
> Date: Tuesday, December 15, 2009, 10:29 PM
>
> Yep, I have a 440 on a stand with $350 in maching in it.
> That was going
> in my '64 until my job went South. Then I thought it'd be
> cheaper to do
> the poly. I'm not so sure but I gotta admit it's a much
> more interesting
> car the way it turned out. I don't think I'd
> have all my "fans" without the poly. I'm even having evil
> thoughts about
> doing another poly but much bigger and badder :-) I've had
> a builder
> that wanted my poly and that just might finance another
> project! I gotta get this one maxxed out first though.
>
> Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies
> =====================================================================
> Dennis C. wrote:
> >
> > OK,
> >
> > I had plans for someday in the future to remove the
> 318 Poly from my 64
> > and put a big block in - I think you just screwed up
> my plans.
> >
> > You have me thinking really hard about stroking the
> old 318, rebuilding
> > the old automatic and having some fun with it. I
> knew the poly was a
> > nice engine but I guess I never really knew how nice.
> >
> > Thanks for the great information.
> >
> > Dennis C.
> >
> >
> > Gary Pavlovich wrote:
> > >
> > > Dave,
> > >
> > > The 318A "Poly" engine that many refer to
> is nicknamed a "Poly" because
> > >
> > > the
> > > head design is a Polyspherical combustion chamber
> with canted valves
> > > (angled
> > > intake & offset from the exhaust - not in the
> same plane and side by
> > > side as
> > > the Wedge chamber) as opposed to a HEMIspherical
> chamber.
> > >
> > > The Plymouth Poly was produced from 1956-66 as a
> 277, 301, 303, 313,
> > > 318,
> > > and 326 (1959 Dodge only) and shares many of the
> same parts as the later
> > >
> > >
> > > 273/318/340/360LA Wedge-head engines.
> Sometimes the aforementioned
> > > Wedge-head engines are mistakenly called "A"
> engines which can be
> > > confusing.
> > >
> > > Interestingly, the modern 4.7 Chrysler engines
> are a Polyspherical
> > > chamber
> > > design and not a wedge design; even the new
> HEMI's are not true 90degree
> > >
> > >
> > > Hemispherical valve layout.
> > >
> > > The BMEP, brake-mean-effective-pressure of a Poly
> engine is far superior
> > >
> > > to
> > > the Wedge chamber and slightly behind the HEMI;
> > >
> > > "...the poly engine had one absolutely unique
> feature: its volumetric
> > > efficiency. If the Mopar figures as found in the
> Plymouth factory manual
> > >
> > > are
> > > to be believed, torque of the poly 318 was 345
> lb.ft. Now, take torque
> > > and
> > > divide it by cubes, then multiply this by 151,
> and you get brake mean
> > > effective pressure (bmep). Try it for your self:
> bmep for the poly 318
> > > is
> > > 164 psi. (Again, that's the figure Plymouth
> gives). That is near to the
> > > theoretical limit for an unsupercharged engine
> (and that's with the old
> > > log-type exhaust manifolds too) and is very close
> to the 426 hemi's bmep
> > >
> > > of
> > > 173psi, which had all those performance-designed
> components. The bmep
> > > figure
> > > purely reflects breathing efficiency
> (proportional use of the charge
> > > coming
> > > into the engine), and is a product of the head,
> as opposed to the block,
> > >
> > >
> > > which just needs to suck/blow as rapidly as
> possible without flying into
> > >
> > >
> > > little pieces..."
> > >
> > > Gary Pavlovich
> > > ----- Original Message -----
> > > From: "Dave Isle" <mnwildpunk@xxxxxxxxx>
> > > To: <1962to1965mopars@xxxxxxxxxx>
> > > Sent: Thursday, December 10, 2009 8:56 PM
> > > Subject: Beginners question sorry
> > >
> > >
> > > >
> > > > I see a lot of you guys saying you have a
> poly this or a poly that. I
> > > > know
> > > > it is a type of engine but which one is it
> and what makes it a poly.
> > > >
> > > >
> Thank you for being patient and answering this
> probably
> > > > silly question.
> Dave
> > > > Sent via BlackBerry by AT&T
> > > >
> > > >
> > > > ----
> > > > Please address private mail -- mail of
> interest to only one person --
> > > > directly to that person. I.e., send
> parts/car transactions and
> > > > negotiations as well as other personal
> messages only to the intended
> > > > recipient, not to the Clubhouse public
> address. This practice will
> > > > protect
> > > > your privacy, reduce the total volume of
> mail and fine tune the content
> > > > signal to Mopar topic. Thanks!
> > > >
> > > > '62 to '65 Mopar Clubhouse Discussion
> Guidelines:
> > > > http://www.1962to1965mopar.ornocar.org/mletiq.html.
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
> >
> > 1996 Dodge Ram 3500 Van Conversion
> > 1964 Plymouth Belvedere 318 Auto
> > 1963 Plymouth Sport Fury 383 4-speed
> > 1949 Dodge Pickup 289/C4 soon to be changed
> > 1998 Honda Valkyrie Standard
>
>
>
> Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies
>
>
> ----
> Please address private mail -- mail of interest to only one
> person -- directly to that person. I.e., send
> parts/car transactions and negotiations as well as other
> personal messages only to the intended recipient, not to the
> Clubhouse public address. This practice will protect your
> privacy, reduce the total volume of mail and fine tune the
> content signal to Mopar topic. Thanks!
>
> '62 to '65 Mopar Clubhouse Discussion Guidelines:
> http://www.1962to1965mopar.ornocar.org/mletiq.html.
>
>
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