what are the advantages of using longer rods
12-15-2009, 07:13 AM
#11
Senior Member
RACING JUNKIE
Join Date: Dec 2008
Location: Sugar Hill, GA
Posts: 1,365
Originally Posted by ejm
does it not have less side drag on the cylinder wall, creating more power too
?
?
I run the longest rod I can.
Dave
12-15-2009, 02:20 PM
#12
Member
JUNIOR BUILDER
Join Date: Oct 2003
Posts: 84
My compression height on my short deck 565 is around 1.26. I have decided over the years that with a 4.600 bore the piston seems to rock to much so that one corner of the piston touches the head and the bottom of the skirt on the other side looks like it wears at a accelerated rate. I think Im going back to the .250long rod instead of the .400 in a short deck because of this. I dont think there will be a difference at the track.
12-18-2009, 05:32 AM
#13
Senior Member
MASTER BUILDER
Join Date: Jul 2006
Posts: 184
Its been said before many times by very accomplished engine builders. The rod connects the piston to the crank, period. My thoughts, the only real benefit from a longer rod, is the potential for a lighter piston. Certian situations may favor a shorter rod, and certain situations favor a longer rod. For example, a big unrestricted slower port, tends to like the shorter rod, as is accelerates the piston away from tdc harder, yanking on the intake charge, speeding it up. Limited stuff, or smaller higher velocity ports, respond a bit better to longer rods, as the piston dwells a bit, and doesn't accelerate as fast away from tdc, balancing everything
Frank
Frank
