I must have an affinity for underdogs or hopeless cases as I have always been fascinated by the very unsuccessful Lotus 30/40.
The 30 was, of course the car Chapman built with backbone frame despite his designers saying it wont work; and the 40 was famously described as a “30 with 10 more mistakes".
There is a lot of data on the Lotus 30 which had the series 1 with 13" wheels and the series 2 with a revised backbone and, I think 15" wheels.
However there is very little detailed data on the Lotus 40 of which only three were built.
It had a bigger Ford 351 engine; I think a Hewland LG400 transmission instead of the ZF unit in the 30 and certainly 15" wheels. Some areo fixes were added to the 30's swoopy lines but remained a somewhat smaller car than th Lola T70.
From a picture of Clark’s car at Riverside in 1965 it seems to have fuel injection with tall ram pipes.
I know that Lotus used the UK Teclemit-Jackson (TJ) system on the Lotus 30 (just to add to its problems) but I am not sure if the Riverside car had TJ or some other injection. The tall ram stacks were not on the 40 that Jim Clark drove in the UK
I think the 351 engine was the Windsor block, a tall deck version of the original 289 Cobra engine.
The block mountings and bell housing would have been the same as the 289 engine used in the Lotus 30 which makes sense.
One thing which intrigues me is whether Ford racing helped Lotus with the 351 engine. Lotus had of course lost out to Lola on sports cars with Ford but by 1965 the preferred Lola T70 engine was probably the Chevrolet small block 327/350. I have never heard of Lotus having the sort of engine building capablity in the Uk to assemble and develop a special 450bhp 351 Ford engine. I would have thought that capabilty lay very much in the USA. The appearence of much taller ram pipes betwen the cars Uk debut and Rverside would support a US supplied engine I think.
Maybe Ford could see the beginnings of its virtual exclusion from big banger/Can Am racing and supplied something special to Lotus for the important Riverside race. That 1965 race was won by Hap Sharp in a Chevy - powered (and supported) Chaparral. Amazingly Jim Clark came second in the awful 40, one of his many great drives.
Edited by mariner, 01 February 2015 - 15:41.