Running Out Of Options! *opinions Appreciated*

[christian_mr32]

Hey Everyone,

My R32 GTS4t has been sitting in my garage for more than a month now with the engined seized due to a unreliable mechanic!

I've been doing my homework and quite frankly I've had enough!

Well my plan was to rebuild my rb20det, but with forged tomei pistons and spool conrods and ACL racing bearings... But the budget is too much for that to happen especially when you have to bore out the cylinders to 82mm. But i thought you can't go wrong with rebuilding a motor. I just dont trust buying another motor and people have been telling me to get an rb25det? My car is awd and most of the rb25det are all rwd. There is a sump issue apparently?? So i have no idea what to do!

Please give me your opinions or even your experiences if anyone has come thru what I am going thru.

[bubba]

RB25DET Neo out of a series 2 RS4 Stagea.. they are 4WD

[mad082]

RB25DET Neo out of a series 2 RS4 Stagea.. they are 4WD

+1

or buy another rb20 and just hope for the best.

or just rebuild your motor with stock parts. will be a lot cheaper than going forged, but still expensive.

[christian_mr32]

+1

or buy another rb20 and just hope for the best.

or just rebuild your motor with stock parts. will be a lot cheaper than going forged, but still expensive.

I just dont trust buying 2nd hand items no more mad...

With the things i wanna do the motor would be absoltly impossible to break!

With the stagea rb25det there is more than just changing the engine isnt it? Apparently i heard you have to run a neo runnging gear plus the loom and different diff ratios???

[sydking]

The stagea RB25 should drop straight in.

[ClutchBurndout-:(]

+1 for just getting stock parts, is this going to be a track car? if not then i wouldnt worry

[christian_mr32]

+1 for just getting stock parts, is this going to be a track car? if not then i wouldnt worry

I just wanna have a street sleeper... I have a high flowed turbo rated at 450hp running a 14psi actuator...

So I want something really strong and capable of holding such power.

[Marlin]

Just bolt another wrecker RB20 in it mate. Dont go fawkin around with shitty 25's, its just not worth the hassle.

Get a good 2nd hand 20, plug it in, full service (incl cam belt), and get it tuned well (assuming you have an ECU?), and you'll be sweet.

[christian_mr32]

Just bolt another wrecker RB20 in it mate. Dont go fawkin around with shitty 25's, its just not worth the hassle.

Get a good 2nd hand 20, plug it in, full service (incl cam belt), and get it tuned well (assuming you have an ECU?), and you'll be sweet.

Yeah i know buddy but trust me its hard to find a awd rb20det...

[mad082]

I just dont trust buying 2nd hand items no more mad...

With the things i wanna do the motor would be absoltly impossible to break!

With the stagea rb25det there is more than just changing the engine isnt it? Apparently i heard you have to run a neo runnging gear plus the loom and different diff ratios???

just bolt the 25 up to your gearbox, etc. only stuffing around is with the wiring. shouldn't have to bother with diff ratios or anything like that

[christian_mr32]

just bolt the 25 up to your gearbox, etc. only stuffing around is with the wiring. shouldn't have to bother with diff ratios or anything like that

Where could i find one? im searching and i cannot find a thing

[zebra]

try jap wreakers, just Jap, The toy shop etc etc, they will be able to get you either a Stag front cut or just a bare engine.

[christian_mr32]

try jap wreakers, just Jap, The toy shop etc etc, they will be able to get you either a Stag front cut or just a bare engine.

Nothing at all brother... I think i might forge it, it'll cost the same price as a whole engine but which will be reliable? A rebuild motor a 2nd wrecker motor?

[Mandingo]

How does a rebuilt 20 cost the same as a std?

The most i ever paid for a std 20 was thousand bucks and that was with nearly everyrthing still hangin off it.

If it was me. I would go RB30/25

Edited July 14, 2010 by Flipmo

[christian_mr32]

How does a rebuilt 20 cost the same as a std?

The most i ever paid for a std 20 was thousand bucks and that was with nearly everyrthing still hangin off it.

If it was me. I would go RB30/25

Dude we are talking about an rb25det not an rb20... I know for myself i also bought an rb20 for 1k... spent 3k swapping it around with the other rb20 i had and now its happended again all because of my stupid mechanic! Im not gonna let that happen again... And you're talking about a 25/30... I think it'll be impossible to put it on a 4wd setup.

[bubba]

Dude we are talking about an rb25det not an rb20... I know for myself i also bought an rb20 for 1k... spent 3k swapping it around with the other rb20 i had and now its happended again all because of my stupid mechanic! Im not gonna let that happen again... And you're talking about a 25/30... I think it'll be impossible to put it on a 4wd setup.

No it's very possible, my mechanic has a 25/30 in his GTS4, plenty of people here have 26/30's in their GTR's.

I love my 25/30 and am a big advocate of them but it depends how deep your pockets are.

[christian_mr32]

No it's very possible, my mechanic has a 25/30 in his GTS4, plenty of people here have 26/30's in their GTR's.

I love my 25/30 and am a big advocate of them but it depends how deep your pockets are.

If thats the case a RWD rb25det would do the same thing as well wouldnt it?

[shaund]

christian:

If the GTS4 is anything like the GTR, you can just swap the sump across from your RB20 over to the RB25.

All RB sumps are interchangeable, however be aware, on an RB26, an RB25 sump will *fit*, but you have to modify it. I put one on my spare engine just to seal the bottom up.

The Sump has the front diff integrated into it, hence the requirement to swap in your case.

Go find a workshop manual and have a look.

[christian_mr32]

christian:

If the GTS4 is anything like the GTR, you can just swap the sump across from your RB20 over to the RB25.

All RB sumps are interchangeable, however be aware, on an RB26, an RB25 sump will *fit*, but you have to modify it. I put one on my spare engine just to seal the bottom up.

The Sump has the front diff integrated into it, hence the requirement to swap in your case.

Go find a workshop manual and have a look.

I heard something like that, that you could use a rb25 sump onto the rb26?? You know what i'll give it a try, i'll be getting an rb25det... Is there a difference between the series 1 and series 2 rb25det? Also will i still be able to use the same rb20det loom to run it? I heard you can chuck on a nistune and change it? Because if i was to a rwd rb25det cause im not gonna wait that long to find a 4wd one, the rwd loom wont suit the 4wd?

Thanks

[shaund]

If it were me, I'd be looking to keep it simple.. whatever motor you've got in there right now, get a replacement wrecker motor or half cut or something.

If the replacement motor you get isnt gts4, so what, swap sump across, problem solved.

There should be no difference between an S1 and S2 engine. If there is, it'll be very minor, perhaps a different plug on a sensor worst case. Should be easy enough to fix.

Your loom from R32 RB20 may work with R33 RB25 engine, but will very likely require modification, and swapping the ecu from the R33 RB25, but a nistune may work too.

Hit up the search and see what you can find for weird and wacky conversions.