Jump to content
SAU Community

Recommended Posts

Hi Guys

Im currently looking into having a billet steel crank made to suit the RB30 since i am aiming at pushing the RB30 to its limit and also rev it to around 9,000rpm. I know some have done it with a standard crank but they havent lasted and i want to be able to rev it to 9,000rpm without having to cross my fingers im going to snap a crank.

So if anyone know who makes them or who i should speak to that would be greatly appreciated. Im also looking at having a billet crank girdle made to suit

Jordan

Link to comment
https://www.sau.com.au/forums/topic/33610-custom-rb30-crank/
Share on other sites

Your probably going to get a few people asking "is this for street or strip?" and "Whats wrong with the std one?"

That said OS Giken do a 3L kit. Cant u buy their crank/girdle?

Nizpro also used to do the same job i heard, but dunno if they still do it.

U must have $$ to spend to build a motor like that man :( Hope its not for the street cos it wont last long

Link to comment
https://www.sau.com.au/forums/topic/33610-custom-rb30-crank/#findComment-673630
Share on other sites

Well i already know all that stuff and Nizpro arent really that good to deal with if they arent building your engine, the money is being spent and i dont understand people saying if it a street engine it wont last thats the good thing about turbo charged EFI engines they can be detuned for the street i only want an engine that will last on the track which puts alot more strain on an engine than the street does.

Jordan

Link to comment
https://www.sau.com.au/forums/topic/33610-custom-rb30-crank/#findComment-673647
Share on other sites

Can i ask what ur budget.....um limit is for spending money on this engine?

and i dont understand people saying if it a street engine it wont last thats the good thing about turbo charged EFI engines they can be detuned for the street

Then whats the point in spending 1500 on forgies, 2-3k on forged rods, 3k on a crank girdle etc etc.... then have it detuned to run on the street??

Link to comment
https://www.sau.com.au/forums/topic/33610-custom-rb30-crank/#findComment-673663
Share on other sites

Mate. My aim is to biuld a low 9sec car that will last more than a couple of runs and i also want it to run without NOS. I also want to drive it on the street and to Dyno comps where i see fit because unlike all these trailer ponies i want to prove that it can be done.

Bl4cK32: To give you an idea i am using a twin 3037R kit or 3240 kit depends what i can find, should tell you how much power i want to make

Jordan

Link to comment
https://www.sau.com.au/forums/topic/33610-custom-rb30-crank/#findComment-673693
Share on other sites

Dont know if these numbers are still current or if the Sammut Bros are still racing... but al the info i have on them and the car

Peter and John Sammut (Sammut Bros)

State: Melbourne

Vehicle: 1996 Nissan 300ZX

Chassis: Full, with mostly original panels

Suspension: Strut front and Koni/4link rear

Diff: Mark Williams Auminium Pro Stock, pinion support, billet spool, 35 spline axles

Engine: 3.0 litre (183cu.in) Nissan in-line six cylinder (RB30-C) - Engine by Sammut Racing Products,

Aspiration: Twin turbo (parallel)

Cyl head: Aluminium cross flow, 2 valves per cylinder

Fuel System: Methanol mechanical injection

Power: 915HP @ 8950rpm

Torque: 688 ft lb max

Best ET: 7.966

Best MPH: 175.1

Transmission: Powerglide by SRP

Converter: 9" Dominator Weight: 2280lb

Achievements: National Record holder in DD/G and CC/G for ET and MPH. Multiple National Championship event winners. 1993 Australian Champions. 1993 Best Engineered.

Sammut Racing Products, Melb, Aust Tel 613 9315 6854 Fax 613 9315 6991

Link to comment
https://www.sau.com.au/forums/topic/33610-custom-rb30-crank/#findComment-673703
Share on other sites

and why the are you trying to prove you could build a car like Kier's, its already been done?  nothing new

Whats it matter if its been done before??? Doesnt mean other ppl cant equally enjoy it :D

Though, id be just as happy with a high 11second GTR and a healthy bank balance, but im a poor sack so that weighs heavily on my thinking. :)

Link to comment
https://www.sau.com.au/forums/topic/33610-custom-rb30-crank/#findComment-673755
Share on other sites

Steve: The only bloke being a dick is you im asking for some info on crank builders and all the know it alls come out and tell you it cant be done, besides who says im trying to build a car like kiers for you information this will be alot different only the time will be similar

Roy: Cheers mate, i think people that cant dont want those that can to do it, makes them feel kind of insignificant

Jordan

Link to comment
https://www.sau.com.au/forums/topic/33610-custom-rb30-crank/#findComment-673757
Share on other sites

[quote=DESCR8 besides who says im trying to build a car like kiers

Jordan

Umm - u did. + u said u wanted to drive it on the street, and race it on a track.

No need to take offence there mate, were just stating it takes big $$ for the engine u speak of.

Why dont u ask Sydneykid if he takes his 25K rb31 engine down to the track, stip, + drive it on the street to the local Maccas.

Link to comment
https://www.sau.com.au/forums/topic/33610-custom-rb30-crank/#findComment-673820
Share on other sites

I will next time i speak to him, anyway guys thanks for your info. Ive spoken to Nizpro and they said they will make me the Crank and girdle all up fitted and machined around $9000 if anyone else wants to do the same and they rate the rpm for 8800 which equates to a 25m/sec piston speed.

Link to comment
https://www.sau.com.au/forums/topic/33610-custom-rb30-crank/#findComment-673831
Share on other sites

Er, yeah, if you re- read my post, you will notice that i said "I" dont believe it can be done, I also said, do prove me wrong, because I would love to see it, I also said 'good luck'.

You also mentioned that people are saying 'it cant be done', well hey I didnt say that, and, if as you pointed out Kier is already doing it, why even bring up that it cant be done.

Bottom line, I didnt say you were trying to build a car like Keirs, you mentioned his car, I didnt say you couldnt do it, I said 'I dont believe its possible', you are the only one here who is saying 'it cant be done'

So really, who is the dick? perhaps you should read peoples posts before you go jumping off the deep end? you remind me of a spoilt child.

if you cant handle someone elses opinion, or allow someone else to have an opinion, WTF are you doing on a public forum.

Link to comment
https://www.sau.com.au/forums/topic/33610-custom-rb30-crank/#findComment-673847
Share on other sites

Roy, as what Bl4cK32 said

I took the statement that 'unlike all these trailer ponies I want to prove it can be done' and the I want to drive it on the street' to mean he wasnt talking about a car like Keirs, as there is nothing to prove there, it has been done.

Not saying there is anything wrong with Kiers car, but really, its not what most would call 'streetable' more like , 'its driven on the street' - world of difference

Link to comment
https://www.sau.com.au/forums/topic/33610-custom-rb30-crank/#findComment-673852
Share on other sites

Steve: Are you saying there is no such thing as RH9 cars

Just to be cheeky... 'THE RH9' car never even got to 9 did it?

:) oh well.

But yeah, why couldnt you drive it to macca, like seriuously.

are these race motors not allowed to be driven or something?

Me dont follow :aroused:

Link to comment
https://www.sau.com.au/forums/topic/33610-custom-rb30-crank/#findComment-673861
Share on other sites

R31 Nismoid

Huge cams, huge injectors, little power at bottom end, high stall converters/dog boxes - all make for a not so friendly road car, slug down low, and when they come on song, go nuts.

And very, very, very unlikely you could get it street legal, unless you live in queensland

Link to comment
https://www.sau.com.au/forums/topic/33610-custom-rb30-crank/#findComment-673867
Share on other sites

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


  • Similar Content

  • Latest Posts

    • What is the current snail?
    • Never an issue with boost control. No weird boost issues pre throttle at partial throttle like you're suggesting. It worked.   As for all the turbo damage claims, they all were started by aftermarket BOV companies. At least turbo timer companies had SOME truth about them, except people failed to realise that except for in extreme circumstances, that small amount of driving you do to park/ through pit lane etc, is enough to not have a need for a turbo timer.
    • I tell people all the time this stuff runs on a 2 MHz 8-bit MCU. The math is a bit arcane, they do a lot to get around their limited resolution and so on but it works great as-shipped. So if an 80 to 160 MHz modern 32-bit MCU can't make it work you've really screwed something up badly. Your average graphing calculator is faster these days, god forbid we start talking about what's hiding in vapes or some stupid internet-connected "smart appliance".  I suspect the lore about off-throttle surge damaging turbos must be very, very old if it was ever true. I still don't think off throttle surge is good for turbos because you're rapidly having air going in and out of the turbo on top of rapid loss in shaft speed which presumably does impart some kind of unusual load on the rotating assembly. As for the recirculating valve, I believe Nissan actually in a press slide deck of some kind explained for the RZ34 they found it improved response. Prior to that they kept the throttle cracked open instead which causes rev hang and because the throttle/engine is a substantial restriction a ton of the energy in the air stream is lost just to pumping past it. Recirculating helps reduce energy loss by bringing the intake side of the compressor up in pressure so it's not working as hard to pull air in. In DCT cars where they can slam gears I believe Porsche hangs the throttle wide open with no fuel injection to keep turbo RPMs as high as possible during the shift. As for running post-throttle boost source, I would be concerned that at partial throttle on boost you would have driveability issues. It would be constantly trying to run crazy amounts of boost before the throttle to compensate for the throttling effect. Maybe with a much more sophisticated boost control setup you could activate a solenoid that goes from a conventional 3-port setup to something that allows the wastegates to see full vacuum in that specific case? 
    • Did you clean everything out? Take all intercooler piping off, empty the intercooler of oil, clean the exhaust out, etc? Intercoolers make great catch cans... Which makes them less useful for intercooling... But very worth cleaning out, along with all adjoining piping.
    • Update Got turbo back from hypergear, installed everything etc. Bled coolant, wasn't smoking so I thought beauty she's sorted now. Went on a drive, car up to temp, let it idle for about 15 seconds, gave it some gas...nice puff of smoke again. Fml No doubt my turbo was pretty worn anyway but nonetheless frustrating that the problem persists.
×
×
  • Create New...