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hi mate. the oil pump is nismo n1, the crank has a collar fitted. and all the clearances where checked with plastigauge.. i.e endfloat was checked with feeler gauges, and mains/big ends/oil pump-collar gaps were checked, also its all balanced ..bernie

Edited by rockabilly
i was being sarcastic as thats not an overly accurate way of measuring clearances lol

Furry muff.. is there a better way to measure clearances with everything torque'd down?

Oh and when I decide to take my RB30 passed 400rwhp I reckon I'll get one of your cranks to go with the new rods.. 3.4L FTW :thumbsup:

G`Day all,I would like to know what some of you have done o standard crank`s if it worth spending any time cleaning them up cast mark`s ?,weight loss ???,cheer`s chuckie.

If big capacity is wanted why don't you guys go the the nissan v8s ?

While that would be fun it was too much headache and then turbo'ing it would be a nightmare.. the idea is still floating around in the back of my head so maybe one day :laugh:

Chuckie, all I did to my crank is have it ground for oversize bearings. My engine isn't going to be seeing huge revs or MASSIVE power for quite some time, when I get to that stage I'll re-do the crank aswell as new rods etc (or likely get one of these 3.4L cranks :bunny:)

On that note, these bigger cranks.. will they already have the long oil drive and all the other goodies people do to their cranks (grub screwing etc)?

  • 2 weeks later...

Well from all the advice I have received (forum users, tuner and mechanic), 400rwhp seems to be an acceptable cap for now. When I decide I want more, engine will come out and get new rods and a balance along with some head/manifold porting.

more interested in what kind of RPM limit it can handle - especially so after a balance and knifeblade.

are the rods more likely to go before the crank at higher revs?

RPM is far more savage on the up & down bits (pistons and rods) than the round & round bits (crank). They have to stop, change direction and accelerate, then stop, change direction and accelerate again etc while the crank simply rotates. I could see the probability of 1,000 bhp out of a standard crank, but 1,000 bhp out of standard rods is not in my wildest dreams, pistons forget about it.

Cheers

Gary

SK, I might be misunderstanding, are you saying that if the revs aren't excessive then the rods should be able to handle a lot more than 4-500hp? I have my 30 limited to 6800rpm, reckon I would be able to push more than 400rwhp on the stock rods with that limit?

SK, I might be misunderstanding, are you saying that if the revs aren't excessive then the rods should be able to handle a lot more than 4-500hp? I have my 30 limited to 6800rpm, reckon I would be able to push more than 400rwhp on the stock rods with that limit?

RIPS have pushed the stock rods and pistons to 750hp on nos a few times for fun, then wind it back down to 600hp for the street...

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