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8 & 10 cyl Bristol cars Type 407 onwards - restoration, repair, maintenance etc |
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Thanks for your contribution, but I am not sure what you are trying to say! Some twenty years ago I started to 'update' my 383 engine (from 12 miles per gallon). I replaced a lot of items and today I am getting 20 (+ or - 2) miles per gallon depending on the traffic and my temperment. Remember - the Canadian '383' was manufactured for use in California which then had very tight emission controls + lead free fuel. This engine was fitted with a Carter Four Barrel carburettor which met those emission controls by restricting the airflow through it. The Four Barrel Weber carburettor allows some 40% more air (cubic feet per minute). I have a 360 degree unrestricted air filter + new intake manifold fitted. No modification to the bonnet is/was required. The Edelbrock fuel pump was only part of that updating process. I have three 1950's Carter mechanical fuel pumps which broke down - the Edelbrock pump uses a different method of pumping and is self regulated at 6 psi as required by the Weber and is much quieter. Some years ago, the 'leaded' fuel disappeared from the market. To date, I have not re-tuned for that loss. My email is jevs@iol.ie if you would like more detailed info. JEVS |