BCF BMW e23 forum

The chassis was uprated with 10 mm lower and 15% stiffer springs with specially developed Bilstein gas dampers in all four corners.

The antiroll-bars was also a bit thicker to reduce the body roll at the cornering speeds this car was developed for. The front brakes got larger (300 mm x 30 mm) cross-ventilated discs with four-piston calipers from ATE. The rear brakes was basicly the same as of the standard 635 CSi but with pistons with an extra 2mm circumference.

The M635 CSi gearbox was a five speed close ratio Getrag 280/5 with gears arranged in a so called dogleg pattern commonly used by racing cars.

Further back there was a ZF final drive with 25% locking and 3.73 ratio. This final drive was taken from the 7 series and was larger on the outside than the 3.07 used in 635 CSi, so the rear floorplan needed to be reworked to fit the larger final drive. The clutch was basicly the same as on the standard 635 CSi but with a lot stronger springs.

The external differences between the M635 CSi and the standard was minor, a sharp eye could see that the front spoiler was deeper and the fender flares where slightly thinner to accommodate the wider 220/55 Michelin TRX tires on 165 TR 390 alloy wheels or the optional 210 TR 415 BBS three-piece alloy wheels with 240/45 VR Michelin TRX tires.

The rear view was the same, except for the M-badge on the trunk lid.

BeekMW schreef:De achterspoiler, die op de te koop aangeboden E24 zit en volledig in het rubber uitgevoerd is, is dan alleen als M-type geleverd op de eerste series E24. Type 2 heeft een in mijn ogen mooiere M spoiler, deze is in de kleur van de auto met een rubberen rand