RB26 HKS Camshafts on RB25

[Sniper1st]

Hey all, anybody knows if there is an issue running RB26 HKS 272 lift 8.7 on RB25 ??

Thanks

[neostraight6]

It depends on what rb25 u have. If it is a neo it would have solid lifters like the 26, but if it is series 1 or 2 it will have hydraulic lifters and at high rpm the hydraulic lifters would have problems following the cams designed for solid lifters.

[Sniper1st]

It is series 2 hydraulic lifters.

[neostraight6]

HKS has a kit to provide variable valve timing on the intake cam on rb26 that work with the HKS cams, so besides the lifter issue they should work on the 25

[neostraight6]

You need to change to solid lifters. You also need to know if you can use the original valve springs or if stronger valve springs for the cams

[Sniper1st]

Ok anyway, I will look for another brand to suit lash type head.

Thanks for help

[neostraight6]

What about Tomei poncams? They have drop in replacement cams for series 2 Rb25det

[Darius]

Even HKS has drop in cams for the RB25. The only thing I don't like about them is that they don't have notches in the camshaft itself to enable the removal/replacement of head studs without pulling the cams, timing belt, crank pulley, etc. I think the Poncams come with the notches in the shafts.