Kev I'm not sure the plug were a problem..I just changed them for those other one's
I'll be having a little play next week...Bash pot oil...new engine oil...new Ign leads and stuff and will try the other plug also

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Stop Licking the Dog...I Don't Care Who Started It

Those fancy plugs are like pretty fishing lures... they are to lure the buyer and separate them from their $$$.
OK some last longer- but if so good why do Mitusbishi use fancy ones in the rear bank of a Magna V6 and only cheapo ones in the front...??!

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Jimbo maate, plug leads, oil change and general tune up aint going help you against the tide of souped up small blocks at the dyno day. So save your money and effort and spend it on Sue!

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Lillee - 1969 Morris Mini K

^^ bah ha ha

Merry Christmas to all. I have a set of copper core plug/ coil leads, can I use these with electronic distributor. Do I have to use resistor plugs. Advice would be appreciated. Cheers Jim.

Kev, is GR still supplying top shelf plug leads

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"Show me the Mini!"

Well I bought 2 sets off him this year, black ones. Dunno if he still does red.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I have been playing around with resistor plugs on my car - swapping from BP5EY to BPR6ES and I can't see any difference. The both feel the same when driving, temperature is the same and they look the same when pulled out. I have a 45000v epoxy coil and bosch inductive core leads about 2k ohms each. I have also been playing with the plug gap and found 35thou to be the best for my setup.
If you are running low resistance copper leads then yes I would use the resistor plugs. You need a bit of resistance along the line somewhere to help with the spark discharge.

Absolutely. I have the original Lucas leads on my mini. I have a high energy coil (Bosch SU12R) with electronic module and Accuspark Stealth Blackbox. I have been using Bosch WR7DP (New Bosch part number: P8-4) platinum plugs. I've been running these leads, plug and module since 2009, with the Blackbox and high energy coil fitted in 2012. The plugs are BP6ES equivalent platinum and resistor plugs. About 25 dollars a set. I use a new lead between the coil and cap however. I didn't have one at the time so just fitted a similar looking Bosch lead.

After 45 years the leads are fine, and there is no breakover detectable from the insulation. The copper wires are no where near as fragile as carbon dusted cotton as they shake about. I was worried about non-suppressed harmonics damaging the electronics, but this has not been borne out by experience. The spark will kill a horse, but there's no breakover, and the setup is strong and reliable.

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

I run Bosch leads (1.8K ohm approx) with BPR6ES plugs. Coil is a Boach GT40R with an Accuspark black box, and Powerspark module in a 45D dizzy. I would use BPR5ES, but the C/R is 11.0:1 and the 6s stay nice and clean. I thought 5s may be a bit hot for it.
GR swears resistor plugs give a better spark.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Mines still has the original Lucas coil in it its stamped 74 on the bottom and its a 1974 mini