Niels,
Did you actually check the curve? There are an awful lot of cowboys
around in the automotive rebuilding world! I am not saying the
Distributor Doctor is one but it is worth your while to check to make
sure it is OK. The curve shown does not indicate anything drastic.
Was the head skimmed at some stage? Is there carbon build up in the
combustion chambers. Is the mixture set OK. All areas that need
attention. Remember these engines may be old but do have a relatively
high compression and originally needed high octane petrol, the old super
lead containing stuff. Modern HC cars can cope because of anti-knock
electronics. No such thing of course on a Healey. Use Super plus or
Excellium, Premium or what have you: 98 octane. This is available at any
pump I no everywhere in Europe incl. the UK.
Kees Oudesluijs
Niels Bengaard schreef op 22-8-2014 18:00:
> The distrubutor is refurbished and adjusted with the correct curve by
> Distributor Doctor in UK in 2012.
> I have some pictures here
> http://healey.850r.dk/albums/Picture%20Album/album/Distributor/index.html
> And the curve it has
> http://healey.850r.dk/albums/Picture%20Album/album/Distributor/slides/ignitio
> n.jpg .
>
> Niels
>
>
>
> -----Oprindelig meddelelse-----
> Fra: lists [mailto:lists@brits-n-pieces.com]
> Sendt: 19. august 2014 10:20
> Til: Niels Bengaard
> Cc: Healeys, Forum
> Emne: Re: [Healeys] BJ8 Ignition knocking
>
> Hi Niels,
>
> knocking is always a matter of multiple things. Octane, compression, ignition
> timing and load of engine (and maybe some more). So, if Tim Ward told you he's
> running his BJ8 on regular with no problems it is most likely that he had his
> ignition timing adjusted accordingly (i. e. retarded a bit).
> An ignition timing of 15 deg BTDC @ idle is not wrong, but more important is
> the ignition timing while revving up the engine. If the springs in the bottom
> of your distributor have weakened (likely after having done their duty for
> years) and the ignition timing is set on idle you'll get most likely knocking
> in higher revs (dangerous, because it's likely not to be heard and it causes
> serious damage to your engine).
> Possible solutions:
> a) Have the springs replaced with new ones and the distributor "recurved" (a
> good source is Jeff Schlemmer @ http://advanceddistributors.com/)
> b) Install an electronic ignition system like the 123ignition
> (http://www.brits-n-pieces.com/product-detail/123ignition-distributor-jaguar-
> austin-healey-aston-martin-triumph.aspx)
> If you decide in favor of b), use carbon core cables, which are a much better
> choice with electronic ignition, even for our old cars.
>
> Eric Frenken
> Germany
>
>
> Hi Josef
>
> I have the copper wires. I use 99 octane in Denmark, not sure what regular is
> in England, perhaps 95.
> I met an Englishman, Tim Ward, with a golden Austin Healey BJ8, he was running
> regular he said, with no problems.
>
> Niels
>
> -----Oprindelig meddelelse-----
> Fra: Healeys [mailto:healeys-bounces@autox.team.net] Pe vegne af
> josef-eckert@t-online.de
> Sendt: 17. august 2014 21:03
> Til: Healeys, Forum
> Emne: [Healeys] BJ8 Ignition knocking
>
> Hi Niels,
> Six cylinder Austin-Healeys usually need todays super petrol, better super
> plus 98 or 100 Octane, not Euro Super.
> Your shock may be causeed by using wrong ignition cables with high resistance.
> Don`t use carbon core cables. Much better are copper core cables for our old
> cars.
>
> Josef Eckert
> Germany.
>
>
>
>
> Was on holiday in UK this year with my BJ8. Have a couple of questions I need
> your help me with.
> I normally use super octane fuel but couldnt get it and filled up with
> regular. I guess and old car with low compression should be able to use
> regular, but big was my surprise when it started knocking under load at low
> rpm in third and fourth. Filled up with super again and the problem
> disappeared.
> Checked the ignition when I returned home, it4s set at 15 deg BTDC @ 650rpm.
> I recall having read somewhere thats the right number, so what is
> wrong.
> Have altered it to 13 deg now on the little wheel on the distributor, did that
> with the engine running, wow got a shock, high voltage in my arm. How can that
> be, dont recall having had problems with that on other cars.
>
> Niels
> Denmark
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