4age stage camshafts Options

[20v_celica]

ok so i wanna buy camshafts for my 20v bt found some but heres wat i need to kno... ive been told if i go stage2 or higher i have to get new valve springs and everything else, but i have also been told the 4age blacktop was originally designed to be boosted like the 4agze, but due to japans economic situation at the time they upped the compression and left it a n/a... could nebody reassure me of the strength of the 4age head??? or do i really have to redo the whole valvetrain if i want stage2 cams??? anybody help!!!

[soulshadow]

Which camshafts are you getting? The only ones I can even think of are toda Camshafts. There was a few sets that didn't require you to get valve spring sets but there was 1-2 of them that did, but those were high durations. I don't think you want to make your motor such high duration unless your going for some seriouse Horsepower and high revving. I think if there too high your rpms stick around 2-3000 rpms, and you prob don't want that unless in a daily driver. By the way there so expensive, last time i checked they were around $600-1000 for 1 camshaft.