Archived

This topic is now archived and is closed to further replies.

code red

Spark plug gap

6 posts in this topic

Was wondering what kind of plug gap to run with an MSD 6A ignition. Have been told up to .050 in. but that sounds like alot. Just curious what everyone else was running.

Share this post


Link to post
Share on other sites

I assume this is on a tractor?? The coil you use will have a lot to do with plug gap. With my 440 with a 6-AL and a HOT MSD coil I am at about .035. This seems to work good up to 7500rpm.

Share this post


Link to post
Share on other sites

The blaster and blaster 2 will jump a pretty big gap. Your compression ratio does make a difference, higher cylinder pressure generally wont jump quite a big a gap. I would assume that .040 would be maximum for a normal compression low RPM M engine. I hope that there are others more in tune to the lower speed use. I am sure some will chime in.

Share this post


Link to post
Share on other sites

Was wondering what kind of plug gap to run with an MSD 6A ignition. Have been told up to .050 in. but that sounds like alot. Just curious what everyone else was running.

i use .045 with autolite 3116 spark plugs with over 300# compression.

Share this post


Link to post
Share on other sites