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Jun 17, 2009 10:50 am
Jun 17, 2009 10:50 am
Subject: Re: 2 Litre camshaft/valve timing manual
I have send copies of my 2 Litre valve/camshaft timing manual to a number of members, but would like to add that after some trial and error I discovered that the optimum timing for the Newman camshafts as supplied by the Lagonda Club is for the inlet valves to open at 15 degrees BTDC and the exhaust valves to be fully closed at 12 degrees ATDC (unchanged), resulting in an overlap of 27 degrees.
I have discussed this with David Newman himself and he agrees with these values, rather than the original specifications of 12/12. It makes a surprising difference; the engine runs much smoother with this setting and is significantly more economical on petrol.
I have send copies of my 2 Litre valve/camshaft timing manual to a number of members, but would like to add that after some trial and error I discovered that the optimum timing for the Newman camshafts as supplied by the Lagonda Club is for the inlet valves to open at 15 degrees BTDC and the exhaust valves to be fully closed at 12 degrees ATDC (unchanged), resulting in an overlap of 27 degrees.
I have discussed this with David Newman himself and he agrees with these values, rather than the original specifications of 12/12. It makes a surprising difference; the engine runs much smoother with this setting and is significantly more economical on petrol.