<VV> Tune up questions

[Ken Pepke]

Spark plugs do not have a 'shelf life' either in the box or in your engine.  Properly matched to your engine [reach, thread length, and heat range] and driven with limited milage per year, as many of us do, a set of plugs will last for many years.  If you have a Petronix or other high voltage ignition system, you may NEVER have to change them.  

AC with their 'Fire Ring' design are best and Autolight are a good choice, Champion or other makes with an extended tip design; not so much.  [The flame front starts in the wrong place in the cylinder and under the most extreme conditions can hole the piston.]  A 'worn' plug can be renewed by filing the center electrode tip flat to make the edge sharp again.  At 2000 miles per year that will be every ten years  … or more.

Ken P
Wyandotte, MI
65 Monza 110hp 4 speed 2 door
Worry looks around; Sorry looks back, Faith looks up.

*****************************

On Jan 16, 2013, at 9:49 PM, shortle wrote:

> Hi Captain,
> I have no experience with Autolite (Ford) spark plugs in my Corvairs. But I do like Bosch spark plugs. As far as "how often" do I do a major tune ups, like Bryan, it is more based on time than mileage. On my regular long distance cars it is about every 20,000 miles. And I like my wires from Seth.
> Timothy Shortle in Durango Colorado 81301
> 
> -----Original Message-----
>> From: judynrandy at comcast.net
>> Sent: Jan 16, 2013 3:39 PM
>> To: virtualvairs at corvair.org
>> Subject: <VV> Tune up questions
>> 
>> 
>> 
>> I have a couple tune up questions.  1.  Are "Autolite " 275 spark plugs ok to use in a Corvair?   I got them at Advance and that's the number that showed up on their computer as my normal flaps was out of the autolite  425's i wanted. 
>> 
>>   2. How long do most people run a cap, rotor, and plugs these days?  
>> 
>> 
>> 
>> Randy (Cap'n) Hook 
>> 
>> '60 700 4dr., 84/4spd 
>> 
>> '63 ragtop 110/pg 
>> 
>> '65 monza 4dr 84/pg 
>> _______________________________________________