Description

Nitrided, 81.33mm stroke, cross drilled, 1.625" "S" big end journal for 1275 S block. Forged EN40B steel nitrided cranks are considered the ultimate in specification, even over the "billet" type. This is mainly because the grain pattern of a forging follows the shape of the webs and bearings whereas the billet type is machined across the grain. We stock all the forged types as well as re-stroked standard material cranks and new cranks. Heated for maximum durability. these are machined to fit mains width of the Cooper S block only. All cranks have ben re drawn to benefit from latest technology by having the leading edge chamfered on the crank webs to reduce whip and resistance at high revs giving smoother running and easier balancing, plus being mass centre balanced.