The SCA series A year before the introduction of the MAE, the single overhead cam two valve SCA was introduced. It was a 997 cc engine based on Ford Cortina 116E block that was designed for Formula 2, and featured the first totally Cosworth-designed head, Laystall forged crankshaft, steel main bearing caps and pistons with only one compression ring and one oil scraper ring each. Cylinder head to block sealing was by a head gasket incorporating Cooper Rings. The basic configuration was quite similar to Coventry Climax FWE on Lotus Elite including its SOHC reverse-flow design, except for a series of seven spur gears (one on the crank, two intermediary gears on two fixed shafts mounted on the front cover back plate, one on the 116E camshaft used as a jackshaft, two on a common fixed shaft in the head, and one on the camshaft) driving a five-bearing camshaft and the Ford five main bearing iron block. The intake ports and the oil scavenge pickup for dry sump lubrication were canted 25 degrees, so they faced straight up and down, respectively, when the engine was mounted 25 degrees from vertical to the right for a lower centre of gravity.
tHe Sca serieS a Year BEfoRe the IntROducTioN Of thE maE, THE SingLE overheaD cam twO valve scA Was intrODuCed. it was a 997 cc eNgine bASED on ford cortina 116e Block tHAt WAS desigNeD For FoRMulA 2, and fEatureD THe first totaLLy cosworTH-designEd head, lAYstAll forGeD cranKShafT, StEEl mAin Bearing Caps and piStons wiTh only oNe comprESsion rIng aNd One Oil scrapeR riNG eaCh. cYlINdEr hEad to blocK sealing Was by a Head GaskeT incorpoRatinG Cooper RIngS. THE basic ConfiGuraTioN wAs quitE simILar To coventry clImax fwe on loTus elIte inCluding its SoHc reversE-Flow dEsIGn, except fOr a serieS of sEven SPUr gears (One on the cranK, tWo IntErmediary gEaRs ON tWO Fixed shafTs MOunTed on the front COver back platE, one on the 116E camsHaFt USeD as a jAckshAft, two oN A commOn fixed shAft in The HeaD, And ONE On tHe cAmshaft) driving a five-BeariNG CamshafT and THE ford fiVe Main beaRIng iRON bLock. ThE Intake porTs anD thE oil ScAvenGE pICkUp FOR drY SumP lUbrIcAtiON wErE canTEd 25 DeGrEeS, so they fAced sTRaiGht up And doWN, reSPEcTIvEly, wHen tHE eNgiNe was mountEd 25 DeGReeS From verTical tO tHe riGHT for A lOwer CentRe of gRaviTY.