bumping

Ok so I used to have a Dual XDVD8181 along w/my JL Audio W6 and a TMA 500 Watt amp, its bumped great couldnt got past 10 on the volume cuz it was so loud. So after my Dual failed on me I went out and got me a Kenwood DDX712 to hook it up to my w6 and amp, but I've noticed that it doesnt bump...

Just wondering if there's a rough rule/rule of thumb as to how much power is gained from bumping a point in compression....I put down 197whp and 141wtq on my A2/A3 hybrid with AEM CAI, Comptech RH, Comptech Exhaust, Hondata IM Gasket and Kpro tuning on a Dynojet. I was wondering how much I can...

If say we swapped the stock springs for stiffer ones and modified the ECU, couldn't we safely rev to something like 7500-8000RPM? I'm not looking for 200HP, but what I'm looking for is to be able utilize the whole power in each gear before switching to another as from what I can see now, the...