Hi Madhu,
Dump the Piper 285 Cam, there's a company in S.A which makes bolt on cams for Rocam 1.6 engine & its been tried & tested with dyno results depicting gain on top end with out loosing torque at lower rpm, overall good gains when combined with good intake & headers (4-2-1) with free flow. that too on 9.1 c.r, get a good head job & raise the compression & results will be phenomenal.
Here's the link
Ford Performance Cams | Camshafts | Racing