Re: [FWDLK] 290HP FURY ENGINE AND "DOMED PISTONS'

[Eastern Sierra Adjustment Svc <esierraadj@xxxxxxxxxxx>]

> Gary, yeah, I eventually found the 'perfect' dual-point distributor, 
> with the required 28 degrees  of mechanical advancement,  (available 
> on only ONE FWDLK car: 55 Windsor!)
> but, its V.A. is too high for my project, so, I'm still looking for 
> the 'required' V.A. which will provide about 54 degrees of total 
> advancement.

There is one on the 'Pay, right now; it's a 9.5 (19 degrees) which 
SHOULD be ok, but, I'm waiting to hear back from Dave Homstadwith either 
his blessing, on it, or, an instruction to get a lower one :  9 or 8.5 
or 8....
> Gary Pavlovich wrote:
> > Neil,
> >
> > Did you get your distributor?
> >
> > I did find mine after searching through a few boxes;
> > 1956 Plymouth 277 V-8
> > Single points
> > Autolite #1688647
> > 1B 4301A 2L599082
> >
> > It comes with a NOS breaker plate assembly as well if you or anyone 
> > on the list is in need.
> >
> > Gary Pavlovich
> > ----- Original Message ----- From: "Eastern Sierra Adjustment Svc" 
> > <esierraadj@xxxxxxxxxxx>
> > To: <L-FORWARDLOOK@xxxxxxxxxxxxx>
> > Sent: Thursday, November 18, 2010 3:22 PM
> > Subject: Re: [FWDLK] 290HP FURY ENGINE AND "DOMED PISTONS'
> >
> >
> > > Not to say that I told-you-so, because I didn't, here, but
> > > over on the FWDLK website a similar question arose about
> > > the D500 pistons -vs-Poly pistons, and how/why their compression
> > > ratios were different.
> > >
> > > I don't have the Good (Parts-)Book in front of me, now, but
> > > the D500 pistons are physically taller than the Poly pistons
> > > (which even, IIRC, are of negative-deck-height), which produced
> > > their lower compression ratio---despite the larger volume of
> > > the domed Hemi heads--which would tend to decrease an
> > > over-all  c.r. .
> > >
> > > The Hemi pistons even feature valve-reliefs in them; the Polys are
> > > not 'notched'.
> > >
> > > There are different P/N's for the Dodge Pistons, and, I'll bet 
> > > different
> > > P/N's for the PLY's, too.
> > >
> > > BTW, it has been a common practice (deception) to install Hemi heads
> > > onto a Poly engine block.
> > >
> > > The Poly's compression ratio was 8.5:1; the D500's: 9.25:1 (even 
> > > with its
> > > 'domed' combustion chamber, and, with its 'tall' pistons).....
> > >
> > > Installing the 'domed' Hemi heads onto the negative-deck-piston-topped
> > > Poly engine probably REDUCES the c.r. to something like 8.0:1 !!!
> > >
> > > Neil Vedder
> > >
> > >
> > >
> > >
> > > DOLORES ECKERSON wrote:
> > > > Hello Members
> > > >
> > > > After much time and searching I finally can CONCLUDE the 'domed 
> > > > piston' questions involving the 'higher compression' pistons 
> > > > supposedly in the 290Hp engines.
> > > >
> > > > I HAVE A TRUE ORIG FP31 MOPAR PISTON,,,along side a regular 318 9/1 
> > > > compression piston of about 1960 vintage.
> > > > ALL POLY 318s were 9/1 compression except for of course the 290HP 
> > > > engine (supposedly)
> > > >
> > > > I am able to use a common wrist pin to locate both pistons at the 
> > > > same point that they would be on the same connecting rod.
> > > >
> > > > GUESS WHAT--The FURY piston is higher by .010 to .015 (depending on 
> > > > how and where you measure it.)
> > > > SURE DOESNT SOUND LIKE MUCH DOES IT??
> > > >
> > > >
> > > > ANYWAY---A little math based on 9/1 compression for the stock 
> > > > piston and using a .012 average higher FURY piston 
> > > > YIELDS-------------------
> > > > 9.23/1 for the FURY PISTON!!!
> > > >
> > > > So the FURY piston WAS A SPECIAL PISTON,,,yielding approx 9.25/1
> > > >
> > > > ED ECKERSON
> > > > LI  NY
> > > >
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