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. > >