<VV> No Spark Knock ?

[Harry Yarnell]

2° seems awefully low. Had to look it up, and you're right; 2°.
Since you're running 1/2 premium, you can use higher advance.
I use the factory spec as a starting point, and either raise or lower 
(knock) the timing for optimum performance.

harry yarnell
perryman garage and orphanage
hyarnell1 at earthlink.net
----- Original Message ----- 
From: "Allen Miles" <jallenm at comcast.net>
To: "Virtual Vairs" <VirtualVairs at corvair.org>
Sent: Wednesday, May 16, 2007 10:07 AM
Subject: <VV> No Spark Knock ?


I own a nice 64 Vair 4 speed with a 95HP Engine .  The GM shop manual says 
to  set Timing 2 degrees BTDC .  Corvair Basics says 6 Degrees . I am 
running 11 to 12 degrees with no spark knock , unless I am lugging at low 
speed in 4th Gear . I have a Ignitor I I from Clark's (no points) I run 
premium fuel 1/2 of the time middle grade other times about a 50 / 50 Mix . 
Why am I hearing so much about Spark knock (detonation) and I am running 
about 5 degrees above Std settings . My Vacuum advance is OK and Centrifugal 
Advance is working  in my Distributor .   My Vair is running perfect .  Just 
asking for Info .  Allen
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