Built RB25 Head with new hydraulic Lifters - RPM Limit
RB25 Hydraulic Lifter RPM Limit
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500-600hp into a RB is already 'sinking endless amounts of money' into an engine. Especially a 30 year old engine. Unfortunately this is the RB Game. Considering stock power (or at least stock components) will do ~360whp on 98 by simply turning up the boost on the stock gear on a RB26, that would be where I'd say the cutoff point for "sinking endless amounts of money into the engine" Cause to even do this reliably you'd probably need to replace all the bits anyway cause they're old, starting your sinking journey anyway. I reckon the least painful way is rebuilding the engine to make 50hp over stock lol. The 'plan your ownership around a rebuild' was a common saying 15 years ago. -
Well, the NA RB25 is nothing special in terms of the amount of power it makes stock, nor with any easy mods like extractors & exhaust, opening up the intake tract, etc, etc. And just like any small capacity NA engine, getting lots of power out of them takes a fair bit of money and, depending on how far you go with big cams and high compression and so on, quite grumpy to drive. So, boost is the answer. Many many many of them have had a turbo added. This is easy enough. Same as for any engine. Need the things you need to bolt on the turbo of choice, fuel system and management upgrades, clutch, stronger gearbox ( you do not want to run a boost RB25 through the NA box), diff, brakes, etc, etc, same as you would for most other NA+T things. Some much smaller number have had a supercharger added instead. These are good and cool, but have nowhere near the potential of the turbo route. All the same required upgrades apply. So, potential? Anywhere from not much to quite a lot, depending on how much effort and expense you want to go to. Is there value in the effort and expense? Objectively, no, there is not. If you're gaining enjoyment and don't mind blowing a lot of money on the project, then that's where the value is. Parts? Nissan dealers for some. Many many on-line vendors who do Japanese manufacturer spares (buy buying them from disposals at dealers around the world, direct from manufacturers, increasingly from Chinese knockoffs, etc) and warehousing them in Dubai or similar places. Amayama, Partsouk, etc etc. There are quite a few. Some local to Australia, some local to Europe, some local to the US. You can upgrade literally everything. For an NA, unless you're going to boost it, there's little point going past a nice exhaust, as I said above. After that (well, actually probably even before that) you should concentrate on making it handle the best it can, good brake components, light wheels and tyres, and just make it something to enjoy throwing through the curves. You'll never, ever win any drag races, so it needs to be taken as a nice point-to-point car. Throw in some Recaros or Brides, nice Momo wheel and gearknob, so it's pleasant to be in (because god knows, the inside of an R33 is not a pretty place!!) and away you go. -
How many $$$ do you have to slip cams to logbook a car that’s not the orginal to the 1990 standard lol -
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By Nightmare_mistress_R33 · Posted
Thanks for the update I truly appreciate it. I was trying to figure out the sensors.
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