Rb25/26DET Neo Build Worth It?

[LjB123]

Hey guys. So my bottom end has a potential issue, engine comes out to drop the sump later this week to see exactly what, has a bit of a knock on cold start up that goes away. My heads were recently done due to a found exhaust valve leak, so upgraded springs and retainers, and upgraded drop in cams while it was out. Heads went back on and we found the bottom end was knocking at high RPM (not very loud as was heard through the knock box and ear muffs) when they were doing a dyno run with the new head on. Car hasnt been started up again since

I have the option to purchase a freshly machined and honed RB25DET block, with a R34 GTR RB26 Crank, Nitto rods, nitto oil pump, new head studs, main studs, new main bearings for $3500, will need to get my own pistons though as he used the pistons for his RB25/30 build he ended up doing instead, and has had the built block sitting for a while and wants to clear it out. Block had only been assembled for test fitment of everything, then pulled apart so he could use the Nitto Pistons he had in his RB30 build

OR

Get my current RB25DET Neo bottom end fixed up, possible machining, new bearings, new rings, etc etc. Wasnt looking to do forged internals but could go down that track

Was looking to make 300-350 rwkw for now, maybe 400rwkw, as I do have all supporting mods already outside the engine to go to that power (besides the turbo but will upgrade that while im at it)

Will i see much of a difference using the RB26 internals? I know the crank has a longer stroke, what advantages will I see and is it worth just getting the almost-ready-to-drop-in bottom end and going with that, or freshening up my stock Neo bottom end?

 

thanks in advance

[GTSBoy]

See my last post in this thread. Mixing and matching 26 cranks and rods and Neos causing wrinkles that you need to stay on top of.