RB25 into AU

QIKAUII · 10-09-2006, 08:48 PM

a mate off mine is currently thinking bout putting a nissan RB@%DET into his AU series 2 forte.
i personally think he should just rebuild his I6 because it rooted atm
wat u guys think?
hes getting the RB25 front cut very cheap and his father is mechanic and brother a auto electrician so the conversion wnt cost much

honest opion plz?

I6corp · 10-09-2006, 08:50 PM

Id rebuild the I6....... Mainly becuase people shouldnt mix imports with homemade.

Ford = Homemade

Other = Import :P

But its his cash..........

:

70caprigt3k · 10-09-2006, 08:51 PM

Given the success the 4.0L is having with forced induction of late wouldn't it be easier to get the 4.0L rebuilt and whack a turbo on it. If he wants an RB tell him to get a VL or a skyline but don't destroy a perfectly good ford by putting a nissan engine in it.

HLC · 10-09-2006, 08:54 PM

its his car. if he can do it- go for it. at least its different.

stiddy · 10-09-2006, 08:55 PM

Would be an interesting conversion.. I wouldnt use the RB25 though.
But like its been said, with a high success rate of turboing the 4L theres no real point.

RB26DETT on the other hand.... lol or how about a Twin turbo 20b triple rotor? :P

Ruger · 10-09-2006, 08:55 PM

unless the mechanic can fabricate custom engine mounts and maybe a sump then it wont cost much.

but count in an ecu if your not using standard pooline one custom tailshaft or belhousing if hes keeping the box.
engineers cert, custom exhaust.
also the intake manifold might foul against the steering column

may also have problems with fitting against the firewall or trans fitting in the tunnel that will depend on the engine mounts used though.

10-09-2006, 08:59 PM

My question - why?

He already has be backing expertise to rebuild the engine cheap and put in a external ECU like a Haltech. All you then have to worry about if you want to turbo the Falcon engine is cutting and modding the exhaust and putting the flanges for fitting the turbo, piping for intake to turbo to fmic to tb, change of vac lines to before the turbo, oil lines etc.

With Nissan RB engine, you have to worry about fitting, mounts, gearbox, tailshaft, electrics, cooling system, exhaust, steering rack, possibly suspension, intake pipes, FMIC, ECU, sensors and so on. Each of them posing a myriad of issues to get over

Tell your mate to stop dreaming of being a F&F Tokyo Drift wannabe and to wake up to common sense.

70caprigt3k · 10-09-2006, 09:00 PM

Sure its different but with the time and money spent on doing it for not much gain if any it just wouldn't be worth it imho.

*Edit* BlackLS beat me to it, well said mate.

private9 · 10-09-2006, 09:02 PM

The newest RB25's go right up to 2001ish, however most front cuts out there are of the 93-94 variety, thus making the conversion into an AU2 illegal.

Not only that, but RB25s even in modified form don't have much low down urge which is what you need to get a falcon moving. In there natural home in an R33 they're fine as they only have to move 1360 odd kilos, but in a falcon, it would be gutless.

For the price of what the front cut, and conversion costs (yes, I know you mentioned he's got help, but major conversions like this ALWAYS soak up big dollars and present major hassles along the way), he could very easily boost the AU 6 and have a torque monster which will also destroy most RB25s out there.

Engineering a boosted AU engine versus a complete conversion will also be much easier.

As a bonus he'll even have change at the end!

QIKAUII · 10-09-2006, 09:02 PM

yeh that wat i thought but for the money he has i think putting the RB into would b the faster of the 2? and performance paarts for the RB r alot cheap and more common im starting to like the idea to b honest

Ruger · 10-09-2006, 09:06 PM

its his car he can do what he wants but what has the rb25 got over the i6 other than having a turbo on the side standard?
i dont know what the rb25 bottom end is like but the 4L has 4 bolt mains factory which is more valuable than most people recognise hes better off getting the 4L rebuilt tough imo.
the rb25 may work out cheaper (which i highly doubt cos of the custom bits needed) but will be a great big headf*k and i wouldnt be surprised if it would be struggling to crack a 14 second pass. sure its got a hair dryer but its only 2.5L of capacity. always a big downfall.

a turbo 4l would make the rb25 face the wall with its hands behind its head. not worth the effort unless your going for a rb26 or 2jz motor if you are going for the jap motor.

whos not to say the front cuts motor is on the way out either? it is second hand after all. dont say its got xxxxxx k's its only new. give me a motor and ill blow the sucker up without doing any k's.

Ruger · 10-09-2006, 09:10 PM

are they really cheaper?
what parts are we talking?

ever priced up tomei cams for a jap motor? adjustable cam gears? stroker kits and forged pistons?
get prices on those and see what the cost difference for jap vs oz is....

as for things like injectors, fuel regs and pumps, turbos, air filters is all universal.

TZENU · 10-09-2006, 09:12 PM

That is certainly something with a twist...
A couple of years ago I was organising an rb25det conversion into my xf through Brescianni Racing. Quoted with aftermarket computer, fuel pump and reg , c4 auto with histall and nine inch was goin to hit me 8500gs... Which i know is expensive but was going to be different ... Fortunately i saw the light and bought a V8! :evil3:

TZENU · 10-09-2006, 09:13 PM

But given that the ford 6 are damn strong i say why not!

(sorry for double post computer is driving me crazy :jab: )

Au2falcons · 10-09-2006, 09:19 PM

In stock terms

AUII I6 Intec 157kw 357Nm Torque

R33 GTS-T RB25T 186kw 294Nm Torque

AUII weighs 1545kg & R33 Coupe 1310kg

The skyline would be much quicker because of the low weight, but putting that motor into a falcon won't achieve much, the following however is more worthwhile

BA I6 4.0L Turbo 240kw 450Nm Torque

I'll admit the syklines are a cult car, addictive and the RB's have a unique sound, but if that is what he is after then sell the falcon & get a skyline.

Just my 2cents,

Adrian.

Ruger · 10-09-2006, 09:23 PM

the ba turbo will pose ecu dramas in an au you will NEED an aftermarket ecu theres no question about it that would probably be the most expensive way out but the best honestly.

ba turbo in 33 coupe would be more worthwhile :P

JC · 10-09-2006, 09:23 PM

RB25 stock puts out less power than an AU I6, so what's the point. Better off spending money on rebuilding and toughening up the 4.0 I6, even turbo it. For someone that could do it themselves, $4500 is a reasonable budget and the car will pull around 200rwkw easy (equivalent to around 260 fwkw).

BUZ81 · 10-09-2006, 09:25 PM

I still can't see an advantage to this conversion

QIKAUII · 10-09-2006, 09:27 PM

he wants sumthing different i supose i dunno he a confuseing lad! i told him to join up up here so he can do his talking

GlennBA · 10-09-2006, 10:12 PM

Quote:

Originally Posted by HLC

its his car. if he can do it- go for it. at least its different.

<-- that is different... that doesn't mean its good..

HLC · 10-09-2006, 10:18 PM

Quote:

Originally Posted by GlennAUII

<-- that is different... that doesn't mean its good..

i never said it was gonna be good ;)

Lukeyson · 10-09-2006, 10:23 PM

LOL glenn, good call son

private9 · 10-09-2006, 10:33 PM

Quote:

Originally Posted by QIKAUII

he wants sumthing different i supose i dunno he a confuseing lad! i told him to join up up here so he can do his talking

He could always whack a VN V6 in there, that'd be different!

Au2falcons · 10-09-2006, 10:52 PM

More like shooting himself in the foot!!!!

turboute · 10-09-2006, 10:57 PM

Best engine to use would be a 2JZ from an Aristo, 240 or so kW, with minor mods it could go up to 270 or more - std internals good for at least 600hp and there have been cars putting out over 800hp with the std internals (and a very very good tune). best thing is these cuts can be had for about 4k. RB25 is the equivalent of a jap taxi motor it's internals are cheap and they do not last, stupid thing is they also still cost 4k or even more.

Other options I would suggest are - Nissan VH45DE - 4.5L 206 kW (probably more) can be had for about 3k, or a toyota 1UZDE 4.0L again 200ish kW

private9 · 11-09-2006, 08:24 PM

Quote:

Originally Posted by Au2falcons

More like shooting himself in the foot!!!!

No way. Think about all the beautiful clanging and tapping noises he could get out of it! I think someone around here described it as a bogan's thongs slapping together!

janek · 12-09-2006, 01:27 PM

Bah... 200kw fom a turboi motor, putting out less torque in a 'coon?

Cmon! The torque is what drives us. Turbo the AU, and then youll have some fun!

AU2PWR · 16-09-2006, 10:31 AM

ive seen a f100 with a Scania BigRig 12lt Truck Motor complete with Intercooler and Turbo , slow but looked cool

BPXR6T · 16-09-2006, 09:36 PM

Something similar has been done before on this forum I think. I remember seeing a turbo nissan motor in an EB and a turbo soarer motor in an ED. I even seen a lexus V8 go into an ED. Personally I wouldn't do it. I've gone down the turbo 4.0 route. Stacks of low down torque.

That and I like the idea of being able to go to any wrecker and pick up a decent motor for $500. The 4.0 would seem plenty strong. Some are running decent boost on an otherwise stock motor and these things are remarkably hanging together.