Can anyone share their experiences with the Elgin modified S cam installed on a 2.4S engine? I'm interested in the before/after value for the money. My understanding is that it broadens the power curve by about 2000RPM and ups the top end ~10-15HP. I'm mostly looking for better relaxed driveability out of my S (the extra top end couldn't hurt either). Note: its my daily driver, not a dedicated track car (some AX & rally's).

Any general experiences about Elgin cams in general also welcome.