Hey all,
Will be building up my RB25 R33 for approx. 500rwhp around April 2011, and need to know a few things before I start..
Background - the motor currently has stage 1 HKS cams and exhaust cam gear (adjustable), however I am unsure of the timing as the motor was bought secondhand.. i assume around 262-264 possibly? also has ACL forged standard bore pistons, and race bearings all round. running on standard conrods at the moment.
New parts - Will be upgrading with the following: Garrett GT3582R .67 rear (700hp capable), 750CC injectors, Sard fuel rail, Malpassi rising rate FPR, walbro intank pump, high mount manifold, plazmaman front facing plenum, and Link G4 plug-in ECU.
I'm shooting for 500hp, so using the rate of approximately 20% loss through a manual drivetrain that puts engine/flywheel power at 600hp...
I want to know if anyone here has ever run an RB25 on this sort of power, I assume it'll need to be running between 22-30 psi of boost, but this will only be for a dyno run to prove capability, the engine will be down-tuned to around 300rwkw or approx. 400rwhp for daily use.
Also if anyone knows, what is the approximate breaking/failure point of standard Nissan conrods in an RB25? I know I'll probably need to upgrade them in the near future anyway, but I understand that dyno-runs at 500hp and daily driving at 400hp exert different stresses on the motor (dyno offers a lot less friction so bigger numbers are easier to obtain without overly much damage to the motor).
TL:DR; will 500hp dynoed and 400hp daily tune kill my standard RB25 rods? pistons are forged.