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. > > > > > > ---- > > 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. > > > > > > > > > ---- > 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. > > > > >