G'day,
i have a ATR43 .63 on a RB25 in a 32, it has 3" TBE, 750cc injectors and a warlbro, at 17psi it punched out 302rwhp and my tuner informed me the next step is a bigger turbo.
any other suggestions for extra power? Cams? i dont want to go down the E85 route as its not readily available at the pump here.