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lrp in an unleaded?
Posted: Fri Dec 20, 2013 7:49 pm
by sierra3dr
The previous owner to my Cortina had told me that the cylinder head has been converted for unleaded use. As I have been driving from home to unit in the Cortina,it runs really bad,starts to judder when slowing down in each gear. Apart from that,when accelerating,it does ping. As I drive the Cortina to my unit,my intentions have been,to dial in the 285 piper camshaft,but my attempt to make a piston stop from an old spark plug has been unsuccessful. Having presented the issues with the engine before I ask,can lrp be used on a cylinder head for unleaded(if it is,not sure) use?
Re: lrp in an unleaded?
Posted: Mon Dec 23, 2013 10:53 am
by Richard Moss
If the head had been converted to unleaded then it should suit any type of petrol
Re: lrp in an unleaded?
Posted: Mon Dec 23, 2013 11:32 am
by Grease Monkey
Use a good quality 'Super Unleaded' petrol, most normal unleaded is rubbish!!
John.
Re: lrp in an unleaded?
Posted: Fri Jan 03, 2014 6:49 pm
by sierra3dr
Richard Moss wrote:If the head had been converted to unleaded then it should suit any type of petrol
True,but there's a possibility that it may not have been. The pinging maybe down to a bad ignition system,I think the motorcraft dizzy has had it's day
Re: lrp in an unleaded?
Posted: Sat Jan 04, 2014 7:30 pm
by Richard Moss
LRP should also be OK on an unconverted head. Pinking is most likely down to a weak mixture or incorrect ignition timing.