>Have been investigating switching my ignition system over to a breakerless
>setup for my 74 V8. I'm intending on using a Mallory ignition control. To
do
>this it appears I will need to replace my Dual point distributor with
either
>a Mallory Magnetic distributor ($320) or a Pertronix device which will
>require me to lock out the mechanical advance. It costs $110. A big
>difference! Anybody with practical experience tell me whether or not there
>is any difference worth the extra $. Oh, I also don't want to lose the
>vacumn advance in the distributor - anyone know if the Pertronix affects
>this?
There is a great article in this month's Grassroots, where they take a
regular
MGBGT and put it on a dyno. Then they add "external" performance pieces to
the engine and measure it again.
Reprint from GRM:
Basleine 56.8hp
Add Petronix 61.1hp
Add MSD 62.7hp
Wires 62.7hp
Petronix/MSD +30deg advance 64.3hp
As above with K&N 65.9hp (+16% increase over baseline)
.
this is an ongoing exercise, and in the next issues they are going to make
more mods.
gerry
|