600RWHP RB25 Series 2 "Reliable"?

[Blakeo]

How many RB25's are out there making 600rwhp reliably? I am in the process of getting mine built by a reputable engine builder here in W.A. I just don't want to throw my money away, it will be getting built with good name brand parts (CP, Nitto, ACL etc). Is 600whp too much of a stretch for a 25 long term, block integrity etc? Anything I should look out for, or know before pulling the pin. 

I know about the RBs oiling issues, and have read the oil control thread. My build will get a 9L sump, proper restrictors, strengthened oil pump/collar, good baffling and my r33 already has a accusump setup in it. 

 

[GTSBoy]

Define usage model and how many miles you expect out of it.

An engine that can make 600rwhp but spends 99% of it's life driving to and from the shops is nothing like something getting drifted by a backward flatbrim vape addict. Know what I mean?

[robbo_rb180]

Like anything depending on how you drive and maintain it. 

If your stressing about it lasting and/or breaking gearboxes probably best to not go chasing numbers. 

Gotta pay if you want to play

I'd take a responsive 300-350hp any day over a 500hp+ 30year old import as a daily. 

[Unzipped Composites]

Yeh, no. Expect it to break something. It's a question of when not if.

[Duncan]

Why is WA still imperial not metric? About 450kw, right?

Anyway, assuming it is not racing of some sort, it should be fine for street and twisty driving because you just don't use the whooshy end of the rev range very much at all, perhaps once or thrice a day or week.

Gearbox however is at risk depending how you shift when you are pushing the car hard. Take it easy on full power shifts and you should be fine

[Dose Pipe Sutututu]

Please talk in kW... we aren't American.

If you want to talk in HP, make sure you convert everything else into the useless imperial system.

450kW for a built motor would be a walk in the park, I would be more concerned about your gearbox going bang

[ChrisW434]

Building it right, and treating it right are the main two things i reckon.

Yeah it'll be reliable if its got good parts, but also assembling correctly in regards to measurement, prep, and clearances etc