Crank Strength And Upgrading Options.

[rockabilly]

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 April 10, 2008 by rockabilly

[shanef]

plastigauge?

[bubba]

Funky plasticine string stuff that you put in where you want to measure, torque the item down then remove and gauge the thickness that the string has spread to..

[shanef]

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

[R TUNE]

oh god

a rb33 or rb34 with say a rb25det head plus twin GT3066R turbos should be very nice

might decide to use this on my future build were will this be avalerble

[bubba]

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

[Rolls]

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

[chuckie]

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.

[bubba]

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

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 )

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)?

[drgnball34]

hate to see what the torque of these stroker cranks do to the gearbox

[infamous_t]

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

If I was rwd it would already be happening, VH41DE+TT ftw!

Still, guy in England got one running (VH41DETT awd) in his 32R

[MBS206]

hate to see what the torque of these stroker cranks do to the gearbox

About the same that high power RB30DETs do to them...

[Eug]

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?

[bubba]

Standard rods? I was told they should handle about 400rwhp but not much more..

[dano4127]

Standard rods? I was told they should handle about 400rwhp but not much more..

farken hope they go more than that!

[bubba]

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.

[dano4127]

fair enough Im hoping they will hold between 450 and 500hp guess it just depends how far the XR6 turbo will take me

[Sydneykid]

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

[bubba]

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?

[dano4127]

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...