RE: piston side clearance

[William Harrison <bbjt3@xxxxxxxxx>]

The machine shop who is boring the block and align boring for a 440 crank suggested around .004 to .007 but I wanted to check with other Mopar guys.
I will tell him to go with what he thinks is best.
He knows that it will only be driven 1/4 mile at a time.
Thanks to all
Bill

--- On Tue, 12/22/09, Steven Charette <stevec@xxxxxxxxxxxxxxxxxxxx> wrote:

> From: Steven Charette <stevec@xxxxxxxxxxxxxxxxxxxx>
> Subject: RE: piston side clearance
> To: 1962to1965mopars@xxxxxxxxxx
> Date: Tuesday, December 22, 2009, 7:24 AM
> 
> Bill,
>     This is one of those questions best
> answered by the piston
> manufacturer and/or your machine shop.  Forged pistons
> are generally run
> loose (I've heard numbers as loose as .010" for drag
> motors).  If your
> machine shop doesn't use a torque plate (which simulates
> head bolt clamping
> loads on the block deck) you need additional clearance for
> that.  Without
> knowing all the details, I'd look for no less than .003"
> and no more than
> .007" (I think Dave might have meant .0055", not .055").
> 
>     Find a competent machine shop close to
> you.  This is one of those
> "separating-the-pepper-from-the-fly-speck" type things that
> really requires
> close attention to accurate measurement.  Stroker
> pistons generally have
> short skirts, which makes side clearance critical to
> minimize the piston
> rocking in the bore.  Too much clearance and the
> pistons will "slap" when
> cold, and can break a skirt.  Too little and you're
> scuffing the walls and
> skirts - until things seize up.
> 
> SC
> 
> -----Original Message-----
> From: William Harrison [mailto:bbjt3@xxxxxxxxx] 
> Sent: Monday, December 21, 2009 10:06 PM
> To: 1962to1965mopars@xxxxxxxxxx
> Subject: RE: piston side clearance
> 
> Dave
> They are forged TRW pistons.
> Any idea how much for this type?
> Thanks
> Bill
> 
> --- On Mon, 12/21/09, dwalters@xxxxxxxxxxxx
> <dwalters@xxxxxxxxxxxx>
> wrote:
> 
> > From: dwalters@xxxxxxxxxxxx
> <dwalters@xxxxxxxxxxxx>
> > Subject: RE: piston side clearance
> > To: 1962to1965mopars@xxxxxxxxxx
> > Date: Monday, December 21, 2009, 5:07 PM
> > 
> > 
> > William Harrison wrote:
> > > 
> > > Does any one out there have any info that applies
> to
> > the piston side
> > > clearance to a stroker motor.
> > > I know you need more for a quarter mile car
> versus a
> > street car but I
> > > don't know how much more.
> > > Thanks
> > > Bill H
> > > 65coronet 2 dr post.
> > > 
> > 
> >  Generally, .003" - .055". It really depends on
> piston material and 
> > application (N/A, nitrous, turbocharged etc. ).
> > 
> > Dave Walters
> > Aurora, Co.
> > 
> > 
> > ----
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> > 
> > 1962 to 1965 Mopar Clubhouse Discussion Guidelines:
> > http://www.1962to1965mopar.ornocar.org/mletiq.html and
> 
> > http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.
> > 
> > 
> > 
> 
> 
> ----
> 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!
> 
> 1962 to 1965 Mopar Clubhouse Discussion Guidelines:
> http://www.1962to1965mopar.ornocar.org/mletiq.html and
> http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.
> 
> 
> 
> 
>