Jump to content
SAU Community

Recommended Posts

Hi Guys,

Ive been reading about people doing their own conversions of RB25 or RB26 into a R32 GTST. Im not sure what to go for, a 25 or 26. Im not chasing HUGE numbers around 220rwkw would be fine so a 25 would be a good choice.

From my research it appears i need the following,

RB25 Engine and Loom

RB25 Gearbox

Diff??? (Not sure)

Heavy Duty Clutch (A want item)

Where would be the best place to have this done, I know its a DIY job but im not very confident in doing it myself. Any information or help would be great.

Thanks

had mine done jan

diff you don't need to change. heavy duty clutch, maybe. depends on what you get with the engine and gearbox you purchase. you may get lucky and already have one fitted in there.

you will need to modify your tailshaft. I had a custom one made up for $550, but you can modify your original one.

apart from that, can't really recall needing anything else.

Ok will call signature.

Based on me having the engine and gearbox already what figure (ballpark) would i be looking at to have old engine+box pulled and 25-26 + box fitted.

Also what price would I be able to sell my RB20 and box for it has 90,000kms

If you can get the box and motor out yourself go see Murnane Motors on the coast they charge $5000 to sit a RB26 between the strut towers and weld up the front diff for RWD and make a dump pipe - in a R32 GTST.

Dont expect anything to be hooked up you are expected to either pay them more money or take it somewhere else if you want the car running...

If that does not sound enticing go see Mick @ Signature or wait till Dan (Elite Racing) slows down a bit, I believe he is into that sort of thing...

Few options there for you, Every performance workshop can do the simple RB Engine conversions

Just be careful because service/price/customer satisfaction differs greatly depending where you go

I have about $5500 to get the engine + box, I guess a RB26 is out BUT a 25 will do nicely. What the hell im going to have a crack at it myself.

I will do pics ect as it progresses.

NOW for a question, Who can i go see to Connect everything up and make me a custom tail shaft

220rwkw?

for the $5K you have to spend, you could make a reliable 250rwkw out of the RB20.

without the hassles of rego paper work, engine swap, being off the road for ages etc.

to make 220rwkw out of an RB25 you are going to need upgraded....

intercooler, fuel pump, afm, injectors, turbo, exhaust, ecu, tune

now, if you buy the above parts for the RB20 you already have, you will still make over 220rwkw and not have to fork out for the purchase of RB25, gearbox, tailshaft, engine swap costs.

If your goal was on the crazy side of 250rwkw, i'd understand the need for more capacity.

just a thought mate.

I think spending the cash on the rb20 will yeald good results for less money.

have a look in to the RB20 dyno results thread in the forced induction section to see what mods make what power on peoples cars.

220rwkw?

for the $5K you have to spend, you could make a reliable 250rwkw out of the RB20.

without the hassles of rego paper work, engine swap, being off the road for ages etc.

to make 220rwkw out of an RB25 you are going to need upgraded....

intercooler, fuel pump, afm, injectors, turbo, exhaust, ecu, tune

now, if you buy the above parts for the RB20 you already have, you will still make over 220rwkw and not have to fork out for the purchase of RB25, gearbox, tailshaft, engine swap costs.

If your goal was on the crazy side of 250rwkw, i'd understand the need for more capacity.

just a thought mate.

I think spending the cash on the rb20 will yeald good results for less money.

have a look in to the RB20 dyno results thread in the forced induction section to see what mods make what power on peoples cars.

Yeah i have have been looking at the dyno results for RB20s with upgraded bits. What im unsure about is the torque low down. Everyone is saying how much more power the RB25 makes over a 20, I had a 33 GTST with a bit of work done it was decent. But if a RB20 will make the power im chasing maybe thats the best way to go.

Will i still need a 33 box to handle the power>??

need for gearbox depends on driving style.

see the car in the vid in my signature.

260rwkw

stock rb20 block and head.

td06 20g (8cm)

ecu blah blah blah.

8800rpm

22 psi (I think)

stock rb20 gearbox

The details of his motor is in that rb20 dyno thread somewhere.

it's Roy's car.

Edit - here is his post

http://www.skylinesaustralia.com/forums/in...t&p=1895402

Edited by GTST
NOW for a question, Who can i go see to Connect everything up and make me a custom tail shaft

Depending when you plan to do the conversion, I can offer to do a plug'n'play loom for you. Send me the RB20 and Rb25 looms and I will return it ready to simply plug in and go. I wire up all items to ensure complete functionality of the standard RB25 ECU (eg. boost solenoid, VCT, FICD, A/C etc). I normally charge $300 for a series 1 or 2 RB25 or RB26.

I have personally done the RB25 into R32 conversion twice and can recommend it. The RB25 gearbox will require more work and if you already have a manual R32 you will need to either modify the gearbox crossmember or make a new one. If the car was originally auto and you plan to use the RB25 gearbox, from what I have seen the original crossmember should bolt up ok.

Cheers

If you can get the box and motor out yourself go see Murnane Motors on the coast they charge $5000 to sit a RB26 between the strut towers and weld up the front diff for RWD and make a dump pipe - in a R32 GTST.

Dont expect anything to be hooked up you are expected to either pay them more money or take it somewhere else if you want the car running...

If that does not sound enticing go see Mick @ Signature or wait till Dan (Elite Racing) slows down a bit, I believe he is into that sort of thing...

Few options there for you, Every performance workshop can do the simple RB Engine conversions

Just be careful because service/price/customer satisfaction differs greatly depending where you go

That is the biggest rip off I have ever heard of :) spend the 5k on mods for the rb20 240-250kw easy :D

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

    • @robbo_rb180 I already have a NEO head on the shitbox 😎 Just needs beehive springs so I can rev it past the 8600 rpm limiter, then again pointless too, turbo is out of puff lol. Wen da gods let me win lotto eh?
    • Everyone I know with a90 supra at time attack aren't having issues with 3-5 fast laps so far and one is decent powered one too. Saw a k24 swapped 86 with a 8hp70 and big slicks and aero which had no drama's at QR and Manton Park. I've stuck a 25 row cooler in my setup with 8hp45/50 in the hopes of keeping the oil cool as I plan on some racing next year that 20-30min sessions. I've also geared my car so won't be using 7th and 8th gear too. @Dose Pipe Sutututu just needs to get that samsonas in already and have that tassie guy fit a head and rev it too 11ty thousand rpm. 
    • My embedded systems thoughts have me sitting with GTS on this. Variation between same phone hardware, should be small. However, the internal "intensity" or "volume" amount that say Google passes to the app, will be quite different, as the underlying hardware will be passing different levels for the same volume to the Google OS. Until the app creator has had each individual phone, and set benchmarks and calibrations for each, the amount of error can be quite huge.   It can even be observed by using different phones, recording the same noise, and then playing it back, they end up soon ding different. A big reason for it, is even the different types of mics used in phones have different responses, and different frequency ranges. Then you need to get into the DSP, and the variations in those, their sample rates which then effect their frequency range, and then the quality of the DSP, and what type of hardware conversion they do to for the ADC within the DSP. Oh, and let's not forget at the low level phones are designed to cutout loud sounds. It's one of the reasons they suck in really loud environments (eg concerts). The louder you yell, the more you'll get cutout too Note DSP is Digital Signal Processor ADC is the analogue to data converter. I don't have any real data on what the variation would truly be, however, chat GPT says in general, their output is typically between +/-2dB to +/-5dB of what you're really measuring. So realistically, anything from 4 to 10dB variation is possible even with the same devices.
    • 'sif the error will be that low!
    • I do know where there is a fair few 😉
×
×
  • Create New...