Hi all,
I've been tossing up whether to put an RB25 in my R32 GTST or just to try and squeeze some power out of the RB20. I've decided to stick with the RB20 for the simple reason that I don't want to be pouring too much money into my car right now.
So anyway i'd like a bit of help with turbo choice for the RB20. I already have a HKS cast manifold with T3 flange and external gate. I have 2 heads, one completely standard and another with some work done but not sure what. It's obviously had a bit of port work done, it definitely has larger cams which are supposedly HKS 270 degree items. It also has upgraded valve springs and HKS adjustable cam gears.
From what i've read in various threads, the RB20 isn't really on song until 4000rpm or more, but i'd still like something fairly responsive.
So using the parts I have lying around, what would you guys be suggesting to squeeze some life out of the old RB20?