A better fire extinguisher (less messy) are the Halon type .
They do not leave a corrosive chemicle behind that you need to clean up when used.
Halon type extinguishers cost more but a lot less mess.
The HEI is suggested so much because it is a better distributer than points.
Creates a hotter spark,pretty much maintenance free,no crossfireing w/that large distributer cap,more water proof (when steam cleaning engine) etc.
When the points distributer shaft bushings & shaft wears,that will make your dwell change,dont have that problem with dwell change w/an HEI.
W/an HEI, you just get more consistant spark.
I run an HEI on my Syclone & so far run up yo 25 psi,w/no spark blowing out yet,but I do run an MSD 6 box,I am sure that helps.
I always ran .035-.040" gap & ran up to 22-23 psi,never missed a beat.
It's not only till now I will close the plug gap to roughly .026",just because I will be spraying a lot of methanol & am increasing the boost pressure.
I have the gap now @ .030" injecting meth & running 23-24 psi & it has not missed yet,just want to play it safe.
MBHD
