It is very noticable on cars with 'norrow' torque curves as it sometimes has a negative effect on the cars general performance.
Lightened fly wheels are really a mod for modified engines and shouldn't be one if the first things to get done.
Spend the money on some performance cams instead.
<span style='color:blue'>"So my BM makes me a flash bastard? Then I guess you're just keeping it real from the seat of your nova?"</span>
<span style='color:gray'>"...and the home of the brave..... is bravey 130bhp from a 7 litre engine? 100bhp/litre or don't bother building it!"</span>
<span style='color:red'>"Aaahh the UK; where every road is jammed, under construction, poorly maintained and unfairly policed, at least we don't get over-taxed for it........ HA HA HA!"</span>