I'm pretty sure you there's no reason to change the plug type depending on the source of the sparks - the construction, physical size and 'heat rating' of the plugs are dependent on the engine, its state of tune and what it's used for. I'd stick to the standard plugs for your engine and its state of tune.
The spark size from wasted coil setups is at least as big as, if not greater, than that from points (a wasted spark coil pack contain two coils so each coil runs 'haf as fast' as a points coil. Each coil therefore has a longer potential dwell time, leading to big sparks)
I opened my plugs up from 25 thou to 40 thou to take advantage of the stronger spark.
If an engine is not running as well on MJLJ as points, then the collective view is that there's something wrong with the install somewhere.
Bigger sparks?
Moderators: JeffC, rdoherty, stieg, brentp
-
strikermk2
- Posts: 0
- Joined: Thu Aug 12, 2004 5:08 pm
thanks
thanks for that Martin. while reading Practical performance car magazine this month they had a article where a tr6 had been converted to efi but would not run. Turns out they had to change plugs to a "Resistor" type due to running on coil packs , hence my question. Once again many thanks Bryan
-
Oliver Sedlacek
- Posts: 68
- Joined: Mon Sep 13, 2004 8:45 am
- Location: The Chalfonts
- Contact:
No change needed
As you may have gathered, I've fixed most of my problems. You shouldn't need to change plugs when going to EDIS, unless they weren't exactly the right ones beforehand. They should be resistor plugs, and I use NGK BP6ES. Many people fit a slightly colder plug like the BP7ES to a hot XFlow, but I've never had a problem.