just wondering?
with a 2.93 pulley do you need to change the gap in the spark plugs?
- Thread starter 04mellowyellow
- Start date
It's a good idea, but not necessary. I used the stock gap until I swapped for a set of Densos. Never had a problem of any kind.
I would do as mentioned above by Doug. Drop them down to .036 or so. Worst case scenario is the idle will be a little rough occasionally, but the chance of spark blowout is greatly reduced.
Dana
Dana
Dana, why would he have an occasional rough idle? That's a new one.
The motor likes a wider gap. But with the boost pressure going up significantly with the smaller pulley, the chances of a misfire are greater. The spark can't jump the standard gap under the increased pressure.
At idle, the narrower gap does not produce a spark of sufficient intensity occasionally to ignite the leaner fuel mix.
It is not something that is really obvious, especially in systems that use
multi-spark, which I believe these cars do, but it is still there.
And the occasional misfire at idle is more than a fair trade off for no spark blow out on the top end.
Dana
At idle, the narrower gap does not produce a spark of sufficient intensity occasionally to ignite the leaner fuel mix.
It is not something that is really obvious, especially in systems that use
multi-spark, which I believe these cars do, but it is still there.
And the occasional misfire at idle is more than a fair trade off for no spark blow out on the top end.
Dana
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