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V8-250 Saloon: LED's & HT Leads

Ursa major
Posts: 86
Joined: Wed Jan 11, 2017 7:21 pm
Location: Eindhoven

Re: V8-250 Saloon: LED's & HT Leads

Post by Ursa major »

Glad to hear you are making progress, Richard.

I look forward to hearing of 100% success with the in-line suppressor :D. I may then follow your "lead" (apologies) so that I can get rid of the resistors and use the solid-state flasher

With best wishes,

Simon

classiclife
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Location: Ridgewood - East Sussex
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Re: V8-250 Saloon: LED's & HT Leads

Post by classiclife »

Hello Simon,

Inline suppressor arrived this morning and subsequently fitted. It is a 7mm push fit unit with a needle point at each end to insert in to the core of the HT lead. Having done that, I then smeared a trace of instant gasket at each end to seal the entry points.

I'm pleased to say that the LED indicators combined with the LED flasher unit now work perfectly at the correct flashing rate. The other benefit of the LED flasher is that it has an audible click in sync with the indicators.

Also added green LED flasher warning bulbs in place of the standard type, these combined with the green plastic film in the cowling really do provide an improved visual direction arrow.

All-in-all very pleased with the outcome and as mentioned I will at some stage remove the R plugs and try the suppressor with the non-resistor plugs. That will have to wait a bit, need to crack on and do some front valance bodywork on the Triumph Vitesse !!

Regards.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Branch Secretary
DLOC 2.5L V8 & V8-250 Registrar - https://www.dloc.org.uk/v8-250
DLOC 2024 International Rally - https://www.dloc.org.uk/rally-2024

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JohnM
Posts: 206
Joined: Thu Feb 11, 2016 1:31 pm
Location: N W London

Re: V8-250 Saloon: LED's & HT Leads

Post by JohnM »

Hi Richard,
Just picked up this thread - I had exactly this problem with my friend's Swallow Doretti, and followed much the same path as you. A set of silicon leads, inline suppressor and resistive plugs solved the problem ( although I had to use a voltage regulator to quieten the electronic tacho, but hat's another story!). BUT when I tried replacing the plugs with standard ones, the problem came back intermittently - so FWIW, I'd leave the R plugs in.......

Interestingly, I didn't have a problem with my SP's installation, and the only differences were I run an alternator, not a dynamo, so an electronic regulator rather than a dynamo and mechanical regulator, and I already had fully suppressed leads and resistive plugs. I did put a conventional capacitor suppressor on the feed to the relay just to be sure, though.

My nephew, who's into restoring Range Rovers etc, also put me on to a Land Rover relay which is meant to cope with a mix of LED and filament bulbs, so I may get one of those to see if it's less sensitive.
https://www.vehiclewiringproducts.co.uk ... asher-unit

As you say, though - an excellent upgrade to convert all the ancillary lighting to LED, I've a lot more confidence people can see our lights now!

Now all we need to have is the opportunity to drive the cars!

All the best,
John
John M in Middlesex, NW London
1962 SP250 "B" Spec
DLOC Herts Region Sec

classiclife
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Re: V8-250 Saloon: LED's & HT Leads

Post by classiclife »

Hello John,

Thank you for your reply, additional information and also outlining the steps you have taken. Interesting regarding the R plugs and saves me a job !!
It looks as though it has to be a coalition of a number of factors to overcome the interference issue.

My car has an alternator and I did consider this as a potential interference source, but I have ruled this out but not via any electrical testing - rather a gut feeling !!

However, as mentioned, I also think the proximity of the coil and the LED flasher unit being nigh on back to back {on the V8 saloon} may well warrant consideration. The further two areas of conflict are from each other the more likely conflict diminishes.

Out of interest, where is the flasher unit and coil situated on the SP250 ??

I doubt a car being predominately metal or glassfibre, exacerbates the interference either.

It would be interesting to ask other marque & model owners if they have encountered this protracted resolution or lucky enough to get away with just using suppressed HT leads and / or a suppressor - be it inline or otherwise.

Finally, my other observation is: does the LED flasher unit supplied need modifying to eradicate this issue. In fairness Classic Car LED's do say that it is very likely a suppressor will be required, but does not demand that their unit is used to solve this underlying problem.

It is an interesting conundrum, certainly.

As you say - great weather but no opportunity to use our classics.

Thanks again, John.

Best wishes.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Branch Secretary
DLOC 2.5L V8 & V8-250 Registrar - https://www.dloc.org.uk/v8-250
DLOC 2024 International Rally - https://www.dloc.org.uk/rally-2024

Ursa major
Posts: 86
Joined: Wed Jan 11, 2017 7:21 pm
Location: Eindhoven

Re: V8-250 Saloon: LED's & HT Leads

Post by Ursa major »

Hi, Richard.

My SP250 had an irritating misfire above 4,500 rpm and I was advised that the solid-core ignition leads may have been the culprits. Changed to a set of Magnecor leads and the misfire is gone AND the EMI/RFI that was affecting the flasher unit is also history, so that problem is solved. Appears to operate perfectly now and I have removed the resistive loads I had in parallel with the rear flashers.

The Magnecor leads are of a very high quality and I can thoroughly recommend them. Robert Grinter still has a few sets that he has had made up, including the correct boots and much better acorn fittings than the old ones had.

With best wishes,

Simon

classiclife
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Location: Ridgewood - East Sussex
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Re: V8-250 Saloon: LED's & HT Leads

Post by classiclife »

Hello Simon,

That is useful to know and I rate Magnecor highly. I am confident that the flasher LED etc problem I had is now sorted thankfully.

Should I hear of someone with similar issues, I will direct them to RG and I am grateful to you for flagging this and your previous thread updates.

Many thanks.

Best wishes.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Branch Secretary
DLOC 2.5L V8 & V8-250 Registrar - https://www.dloc.org.uk/v8-250
DLOC 2024 International Rally - https://www.dloc.org.uk/rally-2024

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