Which HT leads

[Adrian Williams]

I occasionaly get a slight misfire over 8K on my K series R500 and don't like the idea of that old fasioned distributor wizzing round trying to keep up.

 

I'm going to go wasted spark over the winter and fit a coil pack. At the same time I was going to treat the engine to a nice set of HT leads.

 

Should I buy a set from Magnacor, Silicone Blue or a.n.other 🤔

 

Adrian

[Peter T]

There is no evidence that standard leads are worse than Mega expensive 8mm or 10 or 12mm for standard applications.

It is your choice if you want your engine bay to be in blue or red.

If you have a missfire then a standard new set of leads will do.

 

 

[Adrian Williams]

Thanks Peter.

 

It had a new set of leads earlier in the year which will be about 400 miles ago so I'm not blaming the standard leads just looking for a bit of quality kit that I can fit and forget.

 

As for colour the Black is fine goes with evertything 😬

 

Adrian

[Johnty Lyons]

I use a Megnecor set and have done for years Never give any bother 😶‍🌫️

 

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jj

N.I. L7C AR 🙆🏻

Membership No.3927.

240BHP 1900cc K Series 40th Anniversary

 

[Shaun_E]

Adrian - I've just switched from Magnecor to a set of Halfords own brand due to the misfires I was getting at Aintree. Part of the problem for me is having a VVC head with distributor (EU2) ignition - the standard K-series Magnecor leads don't fit well as the VVC head is taller than a standard K16. I doubt you will have the same problem but it has put me off using Magnecor.

 

Yellow SL #32 - member of Drowned Rat Racing

[Simon.Rogers1]

I'm with Shaun on this one.

 

My troubles at the start of the year I can only deduce were as a result of poorly fitting Magnecor leads. Not questioning the quality of the lead but the fit to the plug was certainly poor on my set.

 

Once they slipped over the plug you could feel play in the connection. I made the metal tighter but as it slipped over the plug instead of springing over it just opened up and stayed loose again.

 

I think this may have contributed to the coil failure.

 

Reverted back to rover leads. No problem.

 

Management Team Member

 

[Adrian Williams]

Thanks for the input guys.

 

Adrian

[Rob Walker]

Magnecor leads are the best available The rf leakage/interference is extremely low. The stock graphite leads are rubbish in comparison. If you spec the correct connectors you cannot buy better HT leads. The VVC needs special plug connectors as the head is 13mm taller.

[Peter T]

The stock graphite leads are rubbish in comparison

 

Certainly not in price?

If standard leads are so bad then why do they fit them?

I have never had a problem with standard leads and i am sure that others have not?

Care to explain your reasoning why?

 

 

[Rob Walker]

The stock leads are made to a price and have a graphite core, this can break down with vibration and movement. The graphite cores resistance acts as a current limiter to reduce the energy transmitted through to the spark plug and hence gives supression. The Magnecor lead has a solid centre core this is then insulated then counter wrapped with a coil of wire as a screen to provide the supression, as a result more energy can get to the spark plug and there is less electromagnetic radiation that can corrupt the ECU and sensors. It is escential to use resistive spark plugs with the magnecor leads.

 

try getting a tacho pulse reading off a Mangecor lead its impossible as the leakage is too small.

[Adrian Williams]

Thanks for elaborating Rob, very interesting. What's a resistive plug 🤔

 

Adrian

[Stationary M25 Traveller]

R in the part number ..... with a higher resistance ?