Spark Plug Gap Factory or MSD

[chuckstirrr]

I set my spark plug (GAP) to factory sittings and installed them in my car, a couple of weeks later , I sat down and was reading the MSD instructions (6AL box) upon reading it, it said to (GAP) the plugs at 060 . I was wondering if anybody has found any power gains from a certain gap. thanks for any help

 

[stroked 340]

Been running msd systems for years..gap them at .040.....

 

[skybolt]

Been running msd systems for years..gap them at .040.....

Not doubting you stroked 340 but MSD engineered the system. Compression ratios, cylinder pressures, spark plug heat range? I doubt if one size fits all. Just a thought. Anyone else?

 

[Longgone]

I run mine at .045. I`ve tried everything from .035 to .055 and that`s what the car seems to like the most. Experiment with what you`ve got and see what works best for you.

 

[fishy68]

Not doubting you stroked 340 but MSD engineered the system. Compression ratios, cylinder pressures, spark plug heat range? I doubt if one size fits all. Just a thought. Anyone else?

My thoughts are they might have engineered the system but they didn't engineer the engines out there to work the same with the gap.

I had a MSD system on my 93 Dakota and tried different gaps and it worked best at .045". I have a Mallory system on my Cuda now and it likes .040"

And to the original poster the gains from wider gapping were minimal but were there nevertheless. With the Dakota I noticed it idled better mostly. Didn't really see much power gain.

 

[stroked 340]

Not doubting you stroked 340 but MSD engineered the system. Compression ratios, cylinder pressures, spark plug heat range? I doubt if one size fits all. Just a thought. Anyone else?

True,i'm speaking from personal use..tried other gap widths car runs best at .040..:-D:-D