l8ely my car has been jolting a bit here and there and missfiring , the spark plugs onli have about 500kms on them and i gapped them at 1.5 mm so i very much doubt theat the problem , i started pulling out lead by lead and the first 2 leads has bad restistances so i am pretty confident it is just the leads , what my problem is when i get new leads do i take off the aluminium things and put them on new leads ? , i also want to get top gun leads thougth they mite last a bit longer and are onli 30 bux more expensive , if i do get top gun leads will i have to use my holden aluminium heat protectors or are they totally unnecersary with high performace leads?
The leads I have don't have them. A lead is a lead, unless you are chasing consistent spark at 10 000 rpm and you have a high compression engine running methanol. There is no need to get big expensive high performance leads, they all do the same thing. And I wouldn't use Top Gun, a few people have had problems with them. I use NGK, always have, the current set are up to about 40 000kms now I think.
Leads basically deteriorate from the effects of heat and typically fail close to the spark plug as that's where most of the heat is, so put the shields back on the leads and it protects the plug as well from the considerable exhaust heat , you need a set that is specifically manufactured for the shields as the shields wont fit on a standard lead. Not sure if more expensive ones last longer, generally what you are paying for is greater insulation properties in the outer cover so the spark can not find another route to ground. Ive heard about problems with top gun leads too, but have run them myself on many cars with no problems.
everyone i know and myself run topgun or eagle 9mm ignition leads they dont come with the alloy heat sheild but as long as you by the holden kit the old ones slip straight on the eagle part number for vn is E96108-2 for upto 91 they do them for vt as well . now with the newer leads (both of these included) the size does count cause the new technology in the leads has a flexable ferite core with spiral winding so the spiral winding is closer to the outside of the insulation than a normal lead this is the bit with power in it .with 8mm arcing through the insulation is a problem with 9mm it is all good but over time they do arc .bigger is better
just pull them off if they are too hard lube with dishwashing liquid twist and pull the eagle leads came with the sheilds too i just found out.I presume they are like vn leads they should just pull off the end
if I bought leads right now ide go for the 10.5mm eagle they have two outer layers of silicon verses one layer on the 9mm
