digidocs
Well Known Member
Hi all,
I recently got access to a Vixen spark plug pressure testing machine that allows you to test how well your spark plugs fire under increased pressure.
So far I've tested half a dozen ~300 hour UREM40E and a couple UREM38BY. The plugs I've tested seem to start firing irregularly and then"flame out" between 90-115psi (~0.016" gap). Is this a "good" reading?
I can't seem to find any manuals or other references that explain what's a passing grade on this kind of test.
One other note is that this machine appears to be 50+ years old. It's possible that it could be arcing over internally as the pressure increases, but if that is happening it's not obvious.
Thanks for the help!
I recently got access to a Vixen spark plug pressure testing machine that allows you to test how well your spark plugs fire under increased pressure.
So far I've tested half a dozen ~300 hour UREM40E and a couple UREM38BY. The plugs I've tested seem to start firing irregularly and then"flame out" between 90-115psi (~0.016" gap). Is this a "good" reading?
I can't seem to find any manuals or other references that explain what's a passing grade on this kind of test.
One other note is that this machine appears to be 50+ years old. It's possible that it could be arcing over internally as the pressure increases, but if that is happening it's not obvious.
Thanks for the help!