Hey my Chevy has Ford Rods !!!!!!

[Tom Sharpe]

50%  Short rods move faster away from TDC, hence yank is correct and long rods
are more efficient on the power stroke. TWS

elcamino73 wrote:

> Agreed  100%
>
> ----- Original Message -----
> From: "Clint Corbin" <ccorbin at spinn.net>
> To: <diy_efi at diy-efi.org>
> Sent: Wednesday, January 09, 2002 9:52 PM
> Subject: Re: Hey my Chevy has Ford Rods !!!!!!
>
> > It's geometry guys.  A long rod WILL increase the dwell time at both TDC
> > and BDC.  And because the piston spends more time at the top and the
> > bottom, it WILL be moving faster between the two.  I think it is pretty
> > safe to say that if any rod combo is "yank"ing the air column, it would be
> > the long rod, not the short rod.  The scrub angle on a short rod will
> > increase the side loads on the piston and increase the wear on the rings
> > and cylinders.  In general, the longer dwell time at TDC helps with
> > combustion efficiency and gives a better "push" on the rod during the
> > stroke.  Long rod engines tend to be more efficient than short rod
> > engines.  Of course, as you make the rods longer, they have to get heavier
> > due to the increased beam length.  It also makes the whole engine taller
> > and heavier.  Like everything else, there is a happy compromise that you
> > have to find for YOUR application.
> >
> > Clint
> >
> > At 09:09 PM 1/8/2002 -0600, you wrote:
> >
> >
> > >Programmer wrote:
> > >
> > > > It's for piston dwell time at TDC and BDC--affects cylinder fill...and
> does
> > > > affect HP/torque curve. However--it's more reciprocating mass.
> > >
> > >Short rods tend to yank the air column to get it moving. Long rods tend
> to
> > >suck
> > >gradually and are generally a crutch for bad intake ports. the net effect
> > >depends upon cam timing and intake tract efficiency. 302 Fo^&*%(^&%rds
> run
> > >good
> > >(short rods) because of the combination of parts. 426 Hemis (all Chry)
> > >have long
> > >rods and run good because of good heads. most smaller motors and "work"
> motors
> > >are "long rod".  just another $.02  Tom S
> > >
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