In a message dated 6/22/2005 1:37:21 PM Eastern Daylight Time,
charly@mitchelplumbing.com writes:
I understand the 1 & 4 and the 2&3 thing, but where I get lost is what about
5&6?
Now I'm getting lost. The "opposite" method ie dividing the head in half,
front to rear, & setting a particular valve with its opposite valve fully
open,
is for a STOCK cam without a bunch of overlap. Race cams have completely
different ramps & this procedure isn't reliable. The MOST ACCURATE & EASIEST
method is as follows, starting with the intake.
Pick a cylinder to start with (#1) & rotate the engine in normal direction
until the #1 cylinder EXHAUST valve is just STARTING TO OPEN, just coming off
the seat. Set the intake. Continue rotating until the next cylinder in firing
order has its exhaust starting to open, again, set its intake. Repeat as
necessary. Exhaust is the same but you adjust the exhaust valve with the
INTAKE
on that cylinder FULLY OPEN & just STARTING TO CLOSE ie right past full lift.
Also any bumpstick with a base-circle out more than a few (VERY few) thou
likely isn't very accurately machined & probably doesn't belong in a race
engine to begin with.
try this at your own risk,
Glen
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