Re: Timing Chain Question
LEVE's absolutely right. Over 7 you are running the cam
pretty late and have already lost power. Much more than
that you are in danger if it jumping.
I've seen them as much as 18 - didn't have to take the gears
off to get the chain off! Would have gone any minute like that.
Those specs are maximun slop by the way. Turn the crank in
one direction to get all the slop on one side of the chain, stop,
then reverse direction of the crank.
However far you can move the crank back now is your number.
Interesting to note -- most late model engines are already
running a slow cam for emissions purposes. Most are already
3-5 degrees retarded straight from the factory.
Just the simple act of putting on new aftermarket gears and
chain gets rid of that (good ones,) back to "straight up."
Check into performance type true roller chains and gear
sets - they aren't really all that expensive.
Many have several keyways to select from.
Now think about it - say you aleady have 7 degrees of "slop"
in your chain - that alone will cause it to run late - maybe
by 2 degrees (remember, the "slowness" will be only 1/2 of
your measurement less the original stock slack.)
Add that to 5 degrees late original equipment and you really
True double rollers can get that slop as low, or lower,
than 2. And they don't have the "built in" retarded like the
Set at "0" it's eliminating the stock 5 degrees retarded,
so now you are 7 ahead of what you had before.
You can definately feel it!