Scott
I've got the same engine/distributor setup. However, I'm running an A-8
cam, so my power peak is around 7000 where I shift. I can and have run
the engine to 7500 on a really long straight and the chassis dyno with
no misfire. I do not run an alternator. The battery voltage can run as
low as 11.0 if I have not charged the battery for a couple of sessions -
again, no miss.
I do believe your alternator/voltage regulator may be faulty.
Alternator output should be 13.8 to 14.2 volts from my experience.
Not sure if this helps.
Jim
On 6/11/2011 12:31 PM, Barr, Scott wrote:
> I'm currently using a distributor with a Pertronix II Ignitor in it. A
> couple of weekends ago at Blackhawk Farms, the engine developed a miss
> at 7,000 revs - wouldn't pull beyond 7,000. This is a Spitfire 1296
> small-journal motor with Kas' A-10-A cam in it, so I could use some revs
> beyond 7,000.
>
>
>
> The battery voltage was low all day - something in the neighborhood of
> 12 volts. Would voltage at that level cause a Pertronix not to work
> properly? Seems to me that should be enough volts to make it work fine.
>
>
> The alternator seemed to be putting out plenty of charge, but the
> battery didn't seem to improve through the day. That was the first race
> of the year, so I've pulled the battery and given it a full charge off
> the charger. Will see how well that works out, but may need a new
> battery, too. This one's 4 years old now.
>
>
>
> If that doesn't help, I'll have to send my distributor off for testing.
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