Steve Welton
Joined: 17 Oct 2013
Posts: 105
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 Posted: Thu Jun 22, 2017 8:30 am Post subject: Unleaded Fuel |
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In the Technical Manual the section on Fuel and Carburation B/P/5. I noted the info on leaded and unleaded fuel. It is now some years since adding lead to petrol was phased out and since the advice was published in the Technical Manual. I imagine that there has been some scrutiny of cylinder heads and their valve seats and the arrival at some conclusions.
Does anyone have any updated info on the prolonged use of unleaded fuel?
What fuel do Derby Bentley owners use? Do they use additives as suggested? |
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Christopher Carnley
Joined: 16 Nov 2007
Posts: 2746
Location: Yorkshire, United Kingdom
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| Posted: Thu Jun 22, 2017 9:07 am Post subject: |
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We have new deturbulated cylinder ali alloy cylinder heads with hard steel valve seats.
It is possible to fit them to iron heads facilitated by the removal of the turbulating lip, which subsequently was discovered to have a pronounced effect on pinking, ie pre-ignition. |
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