yoeddynz Posted December 30, 2011 Share Posted December 30, 2011 My old 12A leads need replacing before I start mucking about changing plug heat ranges. (see my Viva thread) I know my dizzy is good, the coils are good (but I'll double check them again) but the leads are just old ones that a mate gave me ages ago. A while back I was about to buy a set of top gun leads when a autosparky friend who races a series 3 rx7 in the pro7 class told me to just get some Bosch leads as the actual carbon core is no bigger on the posh leads, just the insulation is thicker. Is this true? What should one look for with buying leads and has anyone got good experience with any brands? Is it just a bit of a scam- all these big 10mm leads etc? I may also look into changing the leading coil for a 2nd gen rx7 setup in the future but for now I just want the stock setup to be in good order. Quote Link to comment Share on other sites More sharing options...
KKtrips Posted December 30, 2011 Share Posted December 30, 2011 Just buy regular leads from repco/bnt - they are about $8-$12 each from memory.. You only need the fancier leads if you have a higher voltage ignition and want a tiny benefit.. Quote Link to comment Share on other sites More sharing options...
Valiant Posted December 30, 2011 Share Posted December 30, 2011 Eagle, Top Gun and Bosch are all good brands. Don't get the red Repco ones, they're crap. Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted December 30, 2011 Author Share Posted December 30, 2011 is there more to the posh ones than just having more insulation? resistance ? Quote Link to comment Share on other sites More sharing options...
DJZ Posted December 30, 2011 Share Posted December 30, 2011 They are mostly just more insulation, even the 10.5mm leads. Eagle ones from Repco/Appco are good, I have some on my Skyline. I got some made for the Z by Canterbury Auto Electric who reckoned his leads were better than the Eagle ones. Quote Link to comment Share on other sites More sharing options...
DavidTheCreator Posted December 30, 2011 Share Posted December 30, 2011 Eagle, Top Gun and Bosch are all good brands.Don't get the red Repco ones, they're crap. 2nd that. cant beat OE leads IMO Quote Link to comment Share on other sites More sharing options...
Dell'orto Posted December 30, 2011 Share Posted December 30, 2011 Yup, thicker leads are purely thicker from the jacketing. Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted December 30, 2011 Share Posted December 30, 2011 Those leads from canterbury auto electical are pretty good. I beleive they're called "cool cables". But they're only available in 7mm now I think. They have the lowest resistance of any leads I've ever seen. Quote Link to comment Share on other sites More sharing options...
ProZac Posted December 30, 2011 Share Posted December 30, 2011 Eagle, Top Gun and Bosch are all good brands.Don't get the red Repco ones, they're crap. But repco sells eagle leads? If you mean the Champion leads repco also stocks, they're just as good as the eagle ones, however red, instead of blue. Alex, hook me up with some lengths, and what style ends you'd like, and i'll sort it out for ya Quote Link to comment Share on other sites More sharing options...
Raizer Posted December 30, 2011 Share Posted December 30, 2011 Repco at least used to sell repco branded red leads, they were shit! Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted December 30, 2011 Share Posted December 30, 2011 the pre made bosch kits you can get from 40-150 dollars are identical to the bosch leads you buy individually for about $6.50. just saying Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted December 30, 2011 Author Share Posted December 30, 2011 I'll have a look, take some measurements and get back to ya Zac. My coil leads are a bit longer than standard rx7 ones as the coils are mounted further away. So if the insulation is the main difference then how do companies claim such great things of their products? I imagine resistance doesnt make fuck all difference when it comes to a 20,000 volt jolt? Quote Link to comment Share on other sites More sharing options...
ProZac Posted December 30, 2011 Share Posted December 30, 2011 Standard rule for checking leads is that anything above 8kOhm per 300mm of lead means its buggered. Less resistance does in theory mean a bigger spark at your plug... But the ratio of lead resistance (any lead within tolerance that is) to the resistance of the air gap of the spark plug tip means almost all of the voltage drop is at the tip of the plug, hence the location of your spark. I've heard it said, and I tend to agree that if your ignition system is working properly, I.e: no misses, or sparks jumping where they shouldnt be, everything on time, etc... Then upgrading to fancier components will net you exactly zero performance gain. Might gain some longevity however But come on, nothing is sweeter than a nice set of colour coded leads... Ive got a roll of 9mm blue eagle lead sitting here to make the leads for my mini, coz sick leads mean it will pull bettar driftzzzzz (and I'm a tard). Quote Link to comment Share on other sites More sharing options...
ProZac Posted December 30, 2011 Share Posted December 30, 2011 Anyone know the go with CDI systems? They spark at some pretty damn high voltages, maybe leads with thicker insulation might be handy there for avoiding death when inadvertantly holding them? Ask CUL8R about that, heh heh. Quote Link to comment Share on other sites More sharing options...
Yowzer Posted December 30, 2011 Share Posted December 30, 2011 Aren't there some form of leads that have a coil wrapped around the center conductor to create some more inductance? Coz CDI creates a massive but very short duration spark, so the leads are designed to lengthen the spark or some shit. I may be talking out my ass here though Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted December 31, 2011 Author Share Posted December 31, 2011 I remember spending bloody ages deciding between orange leads and black leads at Halfords. I went in to get a basic set and left brother out waiting in car. When I saw they had orange leads that would suit my orange 12a in the brown chevette it became the mega hard decision! I went orange and didn't look back. Eagle do them in black eh? I'll measure the resistance of my current leads too. cheers. Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted December 31, 2011 Share Posted December 31, 2011 I think thats what resistor type spark plugs are supposed to do. Quote Link to comment Share on other sites More sharing options...
Valiant Posted December 31, 2011 Share Posted December 31, 2011 Modern leads have a resistance value to increase the duration of the spark, I would explain it but pre trades was years ago aid I can't remember. it makes the electrons in the HT side of the coil oscilate back and forward or some such. The winding in the lead is to supress the electromagnetic field and stop interferance with radios etc. I could be wrong too. Quote Link to comment Share on other sites More sharing options...
kpr Posted December 31, 2011 Share Posted December 31, 2011 6 dollar each bosch leads from supercheap are all good, and cheap Quote Link to comment Share on other sites More sharing options...
shizzl Posted December 31, 2011 Share Posted December 31, 2011 my ae92 fxgt came from the factory with 9mm leads.. they were 10 years old and produce a better spark than some expensive 10mm leads. beyond performance checked them out and they were amazed at how effective they were,so i kept them on there, i was about to spend $250 on some flashy set with an earthing kit etc... Quote Link to comment Share on other sites More sharing options...
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