Brabham BT35/Lotus Twincam

[smo17003]

This video popped up on my Youtube today https://youtu.be/WHO5K62TGLs?si=uDWNsgO994qmmxBO

Watching it got me wondering what was the fastest Twincam powered car that was produced? I thought someone here would be bound to know. Good video btw.

Mike

[StressCraxx]

Did some searching.

On water - 11/25/67 Class "L" Parker, AZ Harvey Stuska L-64 Metisse hydroplane Lotus-Ford/Stuska 113.374
https://www.vintagehydroplanes.com/apba ... ydros.html
I knew Stuska in Denver Colorado. He built dynos and built the Twincam with Lucas Tecalmet injection.

On pavement - likely the Piper GTR 1300cc Twincam. Clocked on the Mulsanne Straight at 164mph.
https://forums.autosport.com/topic/27885-piper-gtr/
https://www.ultimatecarpage.com/car/4134/Piper-GTR.html

[shynsy]

I wonder whether there has ever been a lotus twincam powered car run at bonneville?
Tim

[trw99]

The late, great Brian Hart developed a race version of the Lotus Twin Cam engine - the 416-B; by as early as 1972 he was getting 190 bhp out of it. Some were small valve versions (1.625" intake & 1.375" exhaust), most had big valves (1.69" intake & 1.44" exhaust); some had iron blocks, some had alloy. At first they breathed through twin Weber 40 or 45 DCOEs: with short trumpets, maximum revs were 8500; for the alloy block version the maximum revs were 9250 with long trumpets.

Later he developed the Lucas fuel injection system for the engine. Hart 416-B engines were popular in the USA and Australia for the US Formula B and Australian F2 during the 1970s. Engine spec's for a 1973 416-B with iron block were 200 BHP min @ 8500 RPM, torque of 130 lbs/ft max @ 7500 RPM; for a 1974 with an alloy block they produced 200 BHP min @ 8500 RPM, torque of 125 lbs/ ft @ 8500 RPM. The engine was fitted as original to the Brabham BT40.

In his book, Miles Wilkins wrote that ‘Hart managed to extract around 200 bhp from an all alloy block TC in 1974’.

Tim