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

[elcamino73]

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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