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-   -   Spark Plug gap with MSD (http://forums.pelicanparts.com/porsche-911-technical-forum/876191-spark-plug-gap-msd.html)

Norm01 07-24-2015 02:04 PM
Spark Plug gap with MSD
 
This is on a 68S 2.0 weber carb engine. Using NGK BPR8ES with an MSD ignition. values for plug gap range widely from the Porsche manual which ranges from .012" to .018 for a factory ignition system to MSD which says .050" to .060 and from Wayne Dempsey which states .050" to .058". What would be recommended, can I really run .050" gap.

mreid 07-24-2015 02:25 PM
You didn't mention compression ratio, but I've found .045" to be about best.

BURN-BROS 07-24-2015 02:31 PM
.045 is about the max you want to run with a distributor. Gaps above this starts to stress the cap/rotor and shorten their lifespans.

Bob Kontak 07-24-2015 03:27 PM
Quote:
Originally Posted by BURN-BROS (Post 8724853)
.045 is about the max you want to run with a distributor. Gaps above this starts to stress the cap/rotor and shorten their lifespans.
As well as find every short coming in your wires and wire looming configuration.


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