Rb25/26/30 NA Power limits?

[rwdaccordswtf]

Simple question I realize you'd be in thousands to see and minimal numbers, I'm not here for that. What I want too know is what numbers have you seen from those NA engines fully built and links to build threads etc would be awesome, thanks.

[RB25GUY]

Not worth the money you can do a L series 3.1L and make 300whp for a decent price. if you were to do a NA RB a RB30 should be the only discussion even then it will be tough to break 300whp without breaking the bank!

[Tempast]

The RB30E is almost identical to the VG30E and make the same power mod for mod. So throwing a DOHC head on it, you've essentially created a VG30DE, which is pretty hard to get 300 wheel out of. If you want NA power you're better off going VQ or VH.

[PoorMans180SX]

Simple question I realize you'd be in thousands to see and minimal numbers, I'm not here for that. What I want too know is what numbers have you seen from those NA engines fully built and links to build threads etc would be awesome, thanks.

I highly doubt you are going to find any build threads with RB's built to the hilt naturally aspirated. Sung Kang's S30z is about as far as people go. I'm fairly certain You could make 300whp out of a 30 if you really spent some cash.

Not worth the money you can do a L series 3.1L and make 300whp for a decent price. if you were to do a NA RB a RB30 should be the only discussion even then it will be tough to break 300whp without breaking the bank!

L series are garbage. OS Giken heads are the only things that redeem those lumps of iron.

The RB30E is almost identical to the VG30E and make the same power mod for mod. So throwing a DOHC head on it, you've essentially created a VG30DE, which is pretty hard to get 300 wheel out of. If you want NA power you're better off going VQ or VH.

Escort Racing is the only entity to try and fully build a naturally aspirated VG. There are a few dudes making in the 260+whp range with pretty basic shit. Also VG ports > RB ports.