| Author |
Message |
Herbert Edward Gault (Irfgt)
| | Posted on Saturday, August 04, 2001 - 12:51 am: | |
As long as they are not too wide or too close there is a pretty big operating range. Most platinum plugs are preset and the factory gap is proper. It really depends on the type of ignition system that you have as to the plug gap. The higher the voltage your system puts out the wider the gap should be. Also a wider gap ignites a leaner mixture providing you have enough voltage to jump the gap. Older cars from the late 60s and early 70s had a low voltage ignition and a rich mixture and a small .025-.030 gap. when emission controls and fuel mileage came about in later years they went to higher output ignition and wider gap .045-.080 to fire the leaner mixtures and for more complete combustion. |
David Harris (Dakharris)
| | Posted on Friday, August 03, 2001 - 10:48 pm: | |
Gap should be .025. My car was missing, so I pulled the plugs to inspect and re-gapped them all. They were all over .03 and none were set the same. My car ran much better at the proper gap. I'm running the older NGK BP6ES plugs that were in the car when I bought it. Having said all of that, if your car is performing well, don't fix what ain't broken. |
Scott Gold (Scotttgold)
| | Posted on Friday, August 03, 2001 - 10:29 pm: | |
I changed the plugs in my 82' 308 GTSi yesterday to Bosch Platinums WR7DP. They came out of the box gapped at .035 and the box said that the gap was set from the factory and needs not to be set again. But the gap was not what the Owners Manual said it should be. Owners manual says
.024-.027
I didn't touch the gap and just installed them strait from the box.
Did I make a mistake?
Does the gap make that big of a difference?
Scott |
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