[Mg-t] RN4C vs RN5C

[Richard Lindsay]

Thank you Bob.

On Tue, Apr 16, 2019, 7:24 AM Robert's New iPad <mgbobh at gmail.com> wrote:

>     RN5 is what I always used, aside from experiments with NGK. They had
> the nice tan colour one wants.  Fuel in CT is 10% alcohol, and the engine
> ran very nicely.
>    BPR6 is approx the same heat range, also used in MGBs.
>    Either should work well for you. Just judge by the colour.
> Bob
>
>
> > On Apr 15, 2019, at 8:49 PM, Richard Lindsay <richardolindsay at gmail.com>
> wrote:
> >
> > Hello Friends,
> >    If using Champion spark plugs in a '53 TD with 89 octane petrol at
> (up to) 10% alcohol, is it advisable to use a slightly hotter plug (RN5C)
> versus the recommended (RN4C) plug? I also have NGK BPR6EIX platinum plugs
> in hand, in the correct heat range. Advice?
> >
> > Rick
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