All -
I have installed a Pertronix 4 cyl distributor on my A90 and a 6 cyl
distributor on my Jag Mk IX with very good results. The only limitation
with these distributors is that the advance curve and vacuum advance are
fixed, unlike the 123 dizzy. Generally speaking I figured this wasn't a big
deal for my daily drivers, but I was still curious about the advance curves.
The curves do seem to roughly follow the Lucas curves for the Big Healeys,
although the Vacuum advance seems to be about 30% more agressive for most
applications except the BN1/BN2.
I've passed the charts to John Sims so that he can post on his website (if
he has the time!). Let me know if you want the data.
Best,
Alan
'52 A90
'53 BN1
'64 BJ8
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