by dave999 » Thu Jan 09, 2020 3:45 pm
NGK are ok in car use but i have found that once fouled they don't recover when cleaned as well as they used to. less of an issue with other brands. not sure what they did to the insulators/ceramic... potentially a problem with petrol these days
if i tune a carburetter equipped car especially with weber or dellorto (easy to be wildly over fueled initially, or have wrong heat range, when the motor is no longer standard) new plugs for tune then swap to a new set once all good.
which is fine if they are couple quid, purchased in retail multi packs. obviously i wouldn't if they were 70 quid a set, if that's the case I make use of a gunson colour tune first (its a handy thing....honest and easy to use) for idle mix and a lambda sensor set-up for mid and top end.
dave
PS champion went through a rough patch about 10 years ago, too many faulty out of the box. If you use 8 at a time, 2 or 3 sets of 8, with a dud in each quickly changes your mind.... quality control or poor handling before sale? dunno.... every batch had a "friday afternoon" lack of care Plug in it. confusing as hell on a multi cylinder multi carb motor, spend all afternoon gapping plugs chasing a misfire round and round.