Jump to content
SAU Community

Crank Strength And Upgrading Options.

LedZepLen

By LedZepLen,
in Engines & Forced Induction

 Share

Recommended Posts

  • 3 weeks later...
  • Replies 213
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

nismomiles33
nismomiles33

I used a grub screwed, machined and balanced, nitrated standard crankshaft (Nizpro spec??) .. should hold up with most, I was told that should be good for 800+HP.

Posted Images

R.I.P.S NZ Collaborator

R.I.P.S NZ

Posted
Posted
really where did you see that?

We've already finished the worlds first genuine RB33 (ie actually slightly over 3300cc) and it was not quite as simple as we first thought it would be, we have twin 3037s and it will be shipped to Ireland for install in a R33 GTR shortly.

I can also vouch for stock RB30 cranks to 9000rpm 1000+hp, and stock RB30, pistons and rods to 8000rpm and over 500rwkw in a track car without problems, although I usually tell my customers 7200rpm, 1.5 bar 400rwkw.

Rob

FineLine Grand Master

FineLine

Posted
Posted
We've already finished the worlds first genuine RB33 (ie actually slightly over 3300cc) and it was not quite as simple as we first thought it would be, we have twin 3037s and it will be shipped to Ireland for install in a R33 GTR shortly.

I can also vouch for stock RB30 cranks to 9000rpm 1000+hp, and stock RB30, pistons and rods to 8000rpm and over 500rwkw in a track car without problems, although I usually tell my customers 7200rpm, 1.5 bar 400rwkw.

Rob

Theres one been sitting in an engine here for 8 months. Still waiting for the rest of the car to be finished before it debuts.

Will be an interesting animal for sure.

Duncan Grand Master

Duncan

Posted
Posted

Hi Rips, I've seen the excellent development work you guys have been doing over the years, but I don't think yours is the first this time :thumbsup: the crank I saw came out of a motor that had been running for a while. I'm not actually sure why it was apart I couldn't see anything wrong with it.

Anyway, I saw this one at Hills Motorsport, I'm sure Mark can provide details to anyone who is interested. I certainly am :)

  • 2 weeks later...
WA_R32 Grand Master

WA_R32

Posted
Posted
We've already finished the worlds first genuine RB33 (ie actually slightly over 3300cc) and it was not quite as simple as we first thought it would be, we have twin 3037s and it will be shipped to Ireland for install in a R33 GTR shortly.

I can also vouch for stock RB30 cranks to 9000rpm 1000+hp, and stock RB30, pistons and rods to 8000rpm and over 500rwkw in a track car without problems, although I usually tell my customers 7200rpm, 1.5 bar 400rwkw.

Rob

keep us updated with the release of this im very interested

  • 2 weeks later...
zebra Grand Master

zebra

Posted
Posted
Hi Rips, I've seen the excellent development work you guys have been doing over the years, but I don't think yours is the first this time :laugh: the crank I saw came out of a motor that had been running for a while. I'm not actually sure why it was apart I couldn't see anything wrong with it.

Anyway, I saw this one at Hills Motorsport, I'm sure Mark can provide details to anyone who is interested. I certainly am :sick:

:) where was that...I didnt see it when I was there last week...wasnt really looking tho

  • 2 weeks later...
Spoolup Mentor

Spoolup

Posted
Posted

My stroker crank is getting closer.

The drawing is finished .Final measurements are 93mm stroke - this will make 3317cc with a 1mm over bore. I will also make a 95mm stroke 3388 cc( but the block will require a little clearancing )

Custom rods will be needed also, these will be I beams and come in the kit as well as pistons.

The first crank should be here early next year.

Dont ask on pricing as the Aus dollar is totally influencing things at the moment.

RB25/26 cranks are next, also SR20 and CA18

N1GTR Grand Master

N1GTR

Posted
Posted

As long as the cost is reasonable (considering there's no social proof to attest to reliability etc) you shouldnt have an issue moving them. Im keeping an eye on your website solely to find more info about that crank option - ive got a spare rb30 block here that (if the price was right) id be happy to put in my GTR and crank out some silly numbers with

Spoolup Mentor

Spoolup

Posted
Posted (edited)

(considering there's no social proof to attest to reliability etc)

I will be building a test engine with the 1st sample - and I will be leaning on it hard - as in very hard with a 50/50 toluene mix.

A Brian Crower 3.4L 2JZ stroker kit ( crank rods and pistons ) in todays market is around $8500, mine will be considerably less. But it still wont be cheap as this is a 4340 billet crank, with 4340 I beam rods and more than likely a custom CP piston to suit.

So dont expect anything less than 5k-6k plus.

Edited by Spoolup
Althotas Proficient

Althotas

Posted
Posted
My stroker crank is getting closer.

The drawing is finished .Final measurements are 93mm stroke - this will make 3317cc with a 1mm over bore. I will also make a 95mm stroke 3388 cc( but the block will require a little clearancing )

Custom rods will be needed also, these will be I beams and come in the kit as well as pistons.

The first crank should be here early next year.

Dont ask on pricing as the Aus dollar is totally influencing things at the moment.

RB25/26 cranks are next, also SR20 and CA18

What capacity are you doing the CA18 to? :P

bubba Grand Master

bubba

Posted
Posted
mmmmmm i think this is a good excuse to delay a rb30 build lol

are mahle pistons really that much better then CP?

LOL makes me want to rush the turbo installation and wind it right up so I can break it sooner and push her to 3.4L.. if only my bank account had the same sentiments lol :(

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Erelyes
      Ceramic turbine damage to engine - what did yours do?

      By Erelyes · Posted

      Ha, well, it's been.... a bit of a journey. Things have taken much longer than I'd hoped. I'll probably put up a thread at some stage. Hopefully soon. The car's not done any kms since my update in June though, put it that way.
    • Dose Pipe Sutututu
      M35 Aftermarket Fuel Pump

      By Dose Pipe Sutututu · Posted

      Here's the chart for fuel pressure vs. current draw, assuming your base fuel pressure is 3 bar and you run like 0.5bar boost on WOT, you should only momentarily hit 9amps here and there. (Ignore my prev post, I cannot read a chart these days it seems)
    • GTSBoy
      RB25 Drama's

      By GTSBoy · Posted

      Those comp test results are not hideous. Whether they are accurate or not (ie, when that comp tester says 140 psi, is the real pressure120, 140 or 160?) is unknown to us. The state of the battery used to crank it over is unknown, etc etc. Many people around here would say that the absolute values and the spread are perfectly fine to just add boost and keep going. I personally would be happier with a narrower spread than that, but even the diff between 125 and 145 is not terrible. That one cylinder at 125 though, has probably copped some damage relative to the others. You should inspect the valves seeing as you've got it open. Do you know how to measure installed ring gaps? That, and an inspection of the rings themselves, is how you will determine whether they need to be replaced. If you're not good to do these things, take the block and the pistons and rings to a shop that is, and ask them for the go/no-go on them. Do the bores need a hone at all? If so, you might well be justified in getting some different pistons in order to get away from the ring supply problem. Whether you're happy to spend a lot more money right now, on more gear, rather than less money, but an amount that looks stupid given that you will only get a handful of rings in exchange for that money, is for you to decide.
    • iain_ST44GA
      M35 Aftermarket Fuel Pump

      By iain_ST44GA · Posted

      also possibly backed up to my filler and shat down it! 🤣
    • Julsmadrid
      RB25 Drama's

      By Julsmadrid · Posted

      Ok so i would love some advice here please, i purchased an R33 a few months back and its had a few mods done to the engine, its an RB25det running a Master ECU, 1200cc injectors, bigger turbo, oil cooler, oil filter relocation kit, Spool H-beam rods, acl/ross pistons. When i removed the motor from the vehicle (as its getting a respray) i thought i would compression test it and these are the following results. Cylinder 1-145psi, Cylinder 2-143psi, Cylinder 3-125psi, Cylinder 4-145psi, Cylinder 5-140psi, Cylinder 6-135psi this test was done with the motor on the ground and powering up the starter motor. I dropped the sump and found broken oil squirters on cylinder 3,5 and 6. I was told my rings are probably worn so i stripped the motor completely to get a new set of rings for it. The trouble is no one has these rings anywhere and they have to be custom made by Ross over in the states and will cost about $600+$200 delivery. My question is how can i tell if my rings are at fault and if they are still ok and is this price ok for a set of rings?
×
×
  • Create New...