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Not sure yet!
Posted by Aaron Gilbert [Email] (more from Aaron Gilbert) on Wed, 3 Apr 2002 21:14:40
In Reply to: how often are you replacing plugs? (long), sleepy saaber, Wed, 3 Apr 2002 19:19:02
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I have about a year and four months on my Jacobs Ignition (inductive, not capacitative). In that time, I have replaced the plugs twice. The first was after about four months, to go to a colder plug when I upped the boost. The first set looked peachy, no need for replacing. The next time I replaced them was about five months later, just for the heck of it, as I was putting my car on a dynamometer. The plugs looked more or less brand new. I replaced them again, for the heck of it, three and a half months later, again going on the dyno, again they looked brand new.
I drive about 1500 miles/month, so respective mileages would be 6,000 miles, 7500 miles, and about 5500 miles. Like I say though, there's no real reason I needed to replace them. My friend at work has a higher powered Jacobs system (several times more spark energy possible), and he claims after six months his plug electrodes are totally worn down. I don't see any indication that this would be so in my car. I'm using Jacob's recommended Autolite plain copper core plugs, at $0.99 each, so replacement is no problem.
I realize none of this really applies to standard Saab ignitions, but thought it may be interesting nonetheless. My observations of the stock ignition and plugs, is just as Michael's, though maybe perhaps slightly longer intervals by a few thousand miles.
Only about 250,000 more miles to go, and my Jacobs will have paid for itself in plug costs alone.. :) It's the mileage that really pays for it, though..
Aaron Gilbert
1987 9000T 273k miles
posted by 207.202.177...
Posts in this Thread:
- how often are you replacing plugs? (long), sleepy saaber, Wed, 3 Apr 2002 19:19:02
- Every 40 - 50000....., VIKINGMAN, Thu, 4 Apr 2002 15:33:15
- Every 20K kms..., BillR, Thu, 4 Apr 2002 12:19:17
- At every service (6,000 miles) like my oil! (n/m), Bill Davies, Thu, 4 Apr 2002 10:47:35
- So what are the best plugs?, Mesopotamis, Wed, 3 Apr 2002 23:09:05
- Not sure yet!, Aaron Gilbert, Wed, 3 Apr 2002 21:14:40 <-- Viewing This Message
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