Fuel consumption

[Nick Challacombe]

I travelled 290 miles today back from Wales. I brimmed my tank at the start of the journey with Shell Vpower and again after 210 miles . I used 51.8 litres which Is near enough 11.38 galls which equates to 18.45 miles per gall.
My engine though is the small 313 cu in although now 318 cu in after a rebuild with 40 th over size pistons. Ports have been cleaned up, head slightly planed , crank rebalanced but not much else. Normally we achieve between 16mpg and 17mpg. Today was mainly motorway work including normal British hold ups.
Shell V power is 99 octane. Your engine will of course use more but at twice as much seems excessive. I did reject the Carter carburettor, I increased the size of the radiator, I use a Facet Red top fuel pump and radial Michelin X tyres.
I expect this does not help much but as it was today I thought I would publish result. KR’s. Nick.