Mud-club
Vehicle & Technical => Series Land Rovers => Topic started by: cherokeegraham on November 26, 2006, 11:05:12
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I've been told that it's ok to run the series 2a on regular unleaded, is this right or should I use an additive?
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A standard 2 1/4 petrol is not designed for unleaded fuel . you can run this engine on unleaded but eventually you will burn the valve seats . you can use an additive or run one tank out of four with leaded petrol .
Alternatively you could fit hardend valve seats when you next have the head off .
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I agree with Al, but that said if you only do about a 1000 ayear it'll be ok for your retirement, but that said I'd go with unleaded and use the additives rather than super which seems to run a little lumpy sometimes...
yours currently switching from super to ordinary, 31 year block with unleaded head.
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Main thing for running on unleaded is to make sure your ignition timing is right for the grade of unleaded you run.
I can't remember off the top of my head, but I'll dig out the various timings for the engine (unless someone has them to hand :-))
As said, unless you are doing loads of miles, don't rush out and get an unleaded head conversion for it.. Run it on unleaded until you have problems... I haven't had any issues yet, even without additives.
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Cheers guys. Muddyweb, that would be really usefull, thanks.
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On the 7:1 engine the static timing for 90 - 95 RON fuel should be 6'BTDC
on the 8:1 engine the static timing for 90 - 95 RON fuel should be TDC.
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I use additive in my old MG and SIIa and haven't had any problems as yet. I was told additive in one out of four tanks would be fine and I haven't managed to prove that wrong so far!
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I fitted an inline fuel catalyst thingy I got from ebay for a fiver and stopped putting the additive in. I do around 8000 miles a year commuting to work every day in my 72 S3 petrol. I know this won't really lubricate the valve seats like lead/an additive, but no problems so far. I hope those aren't famous last words....