MANUFACTURER: Cosworth Engineering
ENGINE MODEL: 4G63 EVO 8
CAMSHAFT PN#: KK3805
SPEC CARD#: N/A

INFO

The milder of the two Cosworth offerings, the M1s from Cosworth delivered a 20 percent increase in peak power over the factory bumpsticks. This camshaft set, touted as “264s” by Cosworth, raises peak power RPM to 8,300 RPM and requires a valve spring upgrade. Despite a slightly lopey idle, streetability of the vehicle is hardly affected. Past 4,000 RPM, the Cosworth M1 camshaft set made significant power gains. The loss in power from 3,000 to 4,000 may be attributed to the larger-than-factory AMS intake manifold with big runners.

RUNDOWN

544.74 WHP @ 8,300 RPM
409.05 LB-FT @ 6,000 RPM

Peak power checked in at 8,300 RPM, as the power curve flattened out from 7,000 to 8,500 RPM. Peak boost was reached at roughly 4,400 RPM. The torque curve remains flat from 5,300 to 7,200 RPM and tapers off slightly higher in the power band. Maximum torque of nearly 410 lb-ft was reached at 6,000 RPM. Highest VE values were recorded at 6,500 RPM, just barely reaching the 100.0 mark. Superior VE figures superior to the factory camshafts were recorded from 4,000 to 8,500 RPM.