RE: Unleaded

[Mike Buckham <MBuckham@domain.elided>]

Hi Richard,

I don't know specifically about the Stag (because I haven't got one yet)
but when I had a Ford Cortina, I had it converted to use unleaded. All
they did was to retard the ignition by 10 degrees and told me to put
leaded in every 4th tank full so that the valves would have at least a
little lead coating. If you use normal unleaded (which has a lower
octane rating than leaded) then it will affect the ignition point of the
fuel which causes the pinking (apparently). The timing adjustment
counteracts this octane difference. Before you do this, though, try
using super-unleaded. The octane difference might stop the pinking.

Cheers,

Mike.

>----------
>From: 	Richard Hudson[SMTP:richard.hudson@domain.elided]
>Sent: 	15 September 1998 09:50
>To: 	'Stag Digest'
>Subject: 	Unleaded
>
>I know we have all been over and over this subject. And it is driving
>everyone up the wall.
>
>I am now running my Stag on unleaded, I have the TR7 spec valves fitted
>and so far no problems. I have not noticed any less power from the
>engine and it doesn't seem to run any different. I have noticed however
>terrible pinking when the engine is labouring going up hills. I live in
>the Chilterns in Buckinghamshire so hills are rife. 
>
>I am running standard ignition timing, I will start to retard the
>ignition a degree at the time, does anybody have views on what I should
>be trying?
>
>Regards
>
>Richard Hudson
>73 Auto White Stag
>
>