well i don't know the real gains over a flatt tappet VS a roller. My car has a 200/200 lunati flat tappet cam with a big set of ported heads and a ported intake with a set of ebay headers and a 3 inch downpipe with a gt 61-52e turbo. my ecm set-up is a fast system. ok
My buddy Mike B has a te62 turbo with a nice set ported heads with a i think a 206/206 roller cam with a gasket matched intake/plenum with the stock ecm with a trans plus( he burns his own chips)
well to make a long story short we have been racing each other on pump gas to see who is the fastest. well @ 15-16 psi of boost he runs low 7.90's with a low 1.80's 60 ft.
I can ran in the low 7.90's @ 15-16 psi of boost with the same low 1.80's 60 fts.
On the highway @ a 60 roll the cars are dead even. so does the roller cam make more power or not? his cam is a tad bigger than mine but i also have 1.65 roller rockers VS his stock rockers.
i'll let you guys ponder on that a bit.
in my opinion i think the gains are not that measureable by any means.
also go here too
Power Gains From Switching to Roller Cam