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I picked up the latest edition of speed, in which they alude to the fact that the Top Secret neo GTRs are running 12000rpm redline. I havent got it with me, but the essential gist was that this should be acheiveble on any finely tuned rb26.

I take a fair bit of what I read in speed with a grain of salt, but this leads me to thinking...

what rev limiters are some of perth/WA's better/more developed nissan engines running? what, apart from a fairly short stroke, does it take to run really high RPM?

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I think limiting factor become stuff like head flow and cam sizing. I know the cars (Jap Import) that they setup for highspeed runs make peak power at about 9000rpm, but they push them out further to make use of the gearing. In other cars like F1 etc they have much higher rev limits due to different head design.

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on a silly side note, the HKS gt-r spins to 11,000 and gtr-700 spins to a couple more from memory, but we're talking 1500hp cars here with a pair of 3037's..

so they have the turbo's to make use of the extra RPM..

there also very highly developed motors..

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I am under the impression that the RB26 is the only rb engine with solid lifters? The hydraulic setup of the others is much less suited for higher rpms as (valve float etc becomes an issue).

RB30 -> longer throw = higher peak piston velocities, which is one of the larger factors in determining maximum rpm (time for some forged internals!).

Reciprocating mass, oil spec and quality, cylinder clearances, component composition, etc will also all have influences on what rpm you can achieve reliably.

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