Jump to content
SAU Community

Recommended Posts

hey im gonna do a turbo conversion to my GTS4 and have been weighing up my options and it looks good to me to put a RB25DET into my car.... but just wondering if the new engine gets bolted onto my sump will the FWD still work?

and what sort of wireling loom, extra pipes and ecu will i need? my bro is a mechanic but more with holdens he can do it for me with his mate who works on all types of cars (includeing turbos) but just need me to understand what parts i will need for it to be done and still have my FWD system.

Also if i do this it will be over xmas and will be taking pics and having a diary of it so it will be good to have in this section

thanks again

Link to comment
https://www.sau.com.au/forums/topic/244281-r33-gts4-engine-swap-to-a-turbo/
Share on other sites

Hey mate, why are you choosing to get a new engine over turboing your current one ??

I choose to keep my current engine to avoid hassles with the 4wd stuff, but yeh, I think if you keep your sump and put the rest of a turbo motor ontop you should be ok...

as long as you have a healthy engine and dont fang all the time you dont have to swap the internals.... im running 14psi atm on a much larger then stock turbo and may be going to 16psi in 2 days... if you are planning on running more then that then u'll be getting forged internals anyway... plus are you using a standard turbo? they wont go much past 10-12psi anyway....

If you want it to stay as a 4wd then its going to not work getting a rb25det from a GTST. First hand experience with gts-4 engine is they are just a mixed engine. Probity best to bolt a turbo on for money sake but if you want a engine then you need, Stagea engine. Fit a gts-4 no problem :domokun: a GTST engine wont even fit in your engine bay because it will sit on the drivetrain and a GTS-4 engine is shaped same as a GTR at the sump so it wont fit getting a GTST engine and swapping the sump

If you want it to stay as a 4wd then its going to not work getting a rb25det from a GTST. First hand experience with gts-4 engine is they are just a mixed engine. Probity best to bolt a turbo on for money sake but if you want a engine then you need, Stagea engine. Fit a gts-4 no problem :Pa GTST engine wont even fit in your engine bay because it will sit on the drivetrain and a GTS-4 engine is shaped same as a GTR at the sump so it wont fit getting a GTST engine and swapping the sump

Very intersting! I didnt know that... I heard they did match up? :domokun: but if youve had first hand experience then good enough for me!

and also HannibalK1ng, im on my P's... planning on having a front mount intercooler or noisy bov??? they will be all over you if you answered yes to either of those....

im running a much larger turbo then standard... my internals are fine... why would you change them for only 10-12psi?!

but atleast youve choosen the easier option of turboing your current motor...

Very intersting! I didnt know that... I heard they did match up? :domokun: but if youve had first hand experience then good enough for me!

and also HannibalK1ng, im on my P's... planning on having a front mount intercooler or noisy bov??? they will be all over you if you answered yes to either of those....

im running a much larger turbo then standard... my internals are fine... why would you change them for only 10-12psi?!

but atleast youve choosen the easier option of turboing your current motor...

hmm i brought a rb25de to do my engine and the whole engine is shaped differently (why the sump had not a chance in fitting) the rwd sump is the part that gets in the way on the drivetrain, then we tried every possibility in the world with the rb25de engine and in the end just used some parts off it on the gts4 engine that i have on a topic on at the moment :P

pretty happy it didnt fit because i have 50thou's now.

in regards to the build, new pistons are not your worries now as you will want to go bigger when your off your P's most likely and as much as i reckon your crazy doing it on your P plates, just keep it standard because a turbo is a big enough fine for now if it goes wrong. haha

haha if i get caught/in trouble and worst comes to worst ill take my mums purple/blue getz and she can drive my skyline :domokun:

if possible can u guys recommend a good FMI with all the pipes i will need? and with BOVs do the different noises provide difrent performance or is it all sounds? if so suggest one that goes susustisus like in this vid lol! http://au.youtube.com/watch?v=JXRSg9BFdOE

thanks for all the suggestions!

haha if i get caught/in trouble and worst comes to worst ill take my mums purple/blue getz and she can drive my skyline ;)

if possible can u guys recommend a good FMI with all the pipes i will need? and with BOVs do the different noises provide difrent performance or is it all sounds? if so suggest one that goes susustisus like in this vid lol! http://au.youtube.com/watch?v=JXRSg9BFdOE

thanks for all the suggestions!

you know... this is the reason I said if your going to have fmic or loud bovs that cops are going to be all over u? your mum isnt going to want to drive your car either because it will be cop bait even for her or if you do get caught she wont have a car because yours will be canaried!

interms of a fmic... if you arent looking to go over 400kw then one of those hybrid kits with all the pipings do the trick.. i have one, cheap, effective cooling, and hasent given me a single hassle!

now... I am not going to give you sh*t because you asked for your car to sound like this http://au.youtube.com/watch?v=JXRSg9BFdOE...this time...but dont dare go onto the turbo threads and ask how to make your car sound like this because you will be flamed until the cows come home and then the thread blocked. so I'll give you a quick explanation of what that sound is.

basicly your bov recirculates air back around your system... the cho cho cho sound you hear is created by blocking off or removing your bov and instead of the air following the path it is meant to take it goes back through the system, and the sound it created as the turbo blades are cutting up the air the wrong way.

It is horrible for performance because it makes your turbo wheel spin the opposite direction before it can stop, jolt and spin the correct way its meant to, so it makes your car much more laggy and horrible to drive, ie very jerky, you can even stall some times.

Ontop of this IT DECREASES TURBO LIFE massivly as they were created to spin fluently in one direction... so this is a great way to blowup ur turbo, and possibly your motor if some of the rear fins fly into your engine.

SO... Dont do it! Get a standard bov that has a great sound anyway, and will keep your car running smooth and have better performance.

no prob mate, I know how daunting this can feel and there are so many options, so I want to atleast try to steer you in the right direction, cuz no one helped me the first time round :)

get everything standard except for the fmic, easier for installing and getting an idea how your engine handles it and less attention from the popo if worse comes to worse. if your engine can take it without blowing, slowly add the next mods.

Hope it goes well!

Adam

basicly your bov recirculates air back around your system... the cho cho cho sound you hear is created by blocking off or removing your bov and instead of the air following the path it is meant to take it goes back through the system, and the sound it created as the turbo blades are cutting up the air the wrong way.

It is horrible for performance because it makes your turbo wheel spin the opposite direction before it can stop, jolt and spin the correct way its meant to, so it makes your car much more laggy and horrible to drive, ie very jerky, you can even stall some times.

Ontop of this IT DECREASES TURBO LIFE massivly as they were created to spin fluently in one direction... so this is a great way to blowup ur turbo, and possibly your motor if some of the rear fins fly into your engine.

SO... Dont do it! Get a standard bov that has a great sound anyway, and will keep your car running smooth and have better performance.

Okay, SOOOO much wrong in what you've posted there...

Yes, the sound is the air being chopped as it flows backwards through the turbo. NO, the turbo does NOT slow down from the air going backwards through it. It slows down as most people run the wastegate source off the intercooler piping, which, when shifting, is still seeing MASSIVE amounts of air pressure, so the wastegate stays open, and there's SFA air keeping the turbo going on the exhaust side. Mix with that a huge resistance, and the turbo slows,but now because of air going backwards through it.

If it were so bad for turbo life, would nissan release the CA18DET without a BOV from the factory? Would Porsche run the GT3 especially in races without a BOV? Nope, they wouldn't.

The BOV was introduced for emmisions reasons, on an AFM car you need it there for emmisions, and to stop the car stalling, unless you run an aftermarket ECU and can tune around this issue.

I run a TD07 with a T04R comp wheel, and T66 exhaust wheel, ZERO lag between gear changes, and I run no BOV, why? My wastegate pressure source comes off the manifold, and helps keep the turbo spooled on gear changes AND my intake pipes are already pressurised as I re-open the throttle to slam air into the motor quickly and produce a shit load of exhaust gas to provide to the turbo.

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

    • Absolute Legend 🍻 After fighting with the scanned ones for the last 10 years this is a God send 
    • ATTAKD 356mm Brake Kit for R34 GTT or R33 GTST. Same brake kit as per here from JJ: https://justjap.com/products/attkd-brake-kit-nissan-skyline-r34-99-02?currency=AUD Can confirm these will bolt directly to a R33 GTST with 12mm bolts OR to a R34 GTT (which is what I had) with the supplied bolts and the collets for the 14mm bolt holes in the R34, which are included. Also included is a set of rotors and hats, as well as 2x brake pad sets. 1) DBA XP (street, hills) 2) Forza FR6 (track) These are radial mounted and bolt directly to R33/R34. You will need extended brake lines to avoid them being full stretch on lock - this is common for all BBK's with the bolt point being in the center. In my case I welded another stud about 25mm lower than the OEM one and retained stock lines and fittings. You'll want a BM57 BMC to get the most out of these. I speak from experience. $1800 (neg for SAU people), located SE Suburbs Melbourne.
    • Set of R33 GTST Calipers, Rotors and Pads. Calipers just taken off my car, rebuilt about ~30,000km ago. Rotors have done about ~20,000km total since new. Pads have plenty of meat. One set is DBA XP (road, hills) and the other set is Forza FR6 (track) Still working perfectly, not rusted, or seized or whatever the hell that greets used brakes. All clips, bolts, retainers, slide pins etc included. Also have OEM handbrake shoes I can throw in there if you're doing a conversion. $650 for the lot, SE Suburbs Melboune/VIC
    • I feel I have covid right now. I spent the time between Dec 21 and Jan 31 pretty much working 16 hour days on the car after it got back from paint. It turns out you generate a long list of "things to do" while the car is off the road but functional. After going to visit my mate for a "Couple of hour job" doing the brakes, 3 full days later I got home There was more on the list, (it got added to while sleeping on couches) but as everything on the list got enthusiastically crossed out as it happened, I've actually forgotten what they were. From memory there were bushes that had to be pressed in and out, washer jets to fit, etc. Some Gregging highlights: 1) The panel shop covered up my washer jets and painted over it. Good job, I think. We had to drill the new bonnet to fit new ones, which was understandably extremely scary. 2) My handbrake on the RHS is f**ked. After never adjusting it forever and learning on the fly, this one is still on my to-do list. It tightens when you pull the lever, but at about 10% of the tension that the passenger side does. Thoughts on what causes this would be great. 3) Pouring an entire liter of brake fluid over the reservoir because I forgot how to use my pressure bleeder. DON'T PUT FLUID IN THE RESERVOIR. IT WORKS BY USING PRESSURIZED AIR NOT PRESSURIZED FLUID.   471907729_9242915229093447_2708910336906717367_n.mp4  I can confirm the vents work great though. 4) Some of the bodykit fixings were f**king awful. I'm talking screwed in with what was at most a 2mm screw, and could flap the kit around by hand. Too many others to mention. They came in, went out of my brain forced by other stupid tiny things that came up and "While the car is on the damn hoist we can fix them" which was a mission in and of itself, because the car has skirts and is thus a pain to put on hoists. Because we had to buff the windscreen to get rid of the overspray, I also had to very gently wash the car. The "Run 3 wires" task was to re-attempt another gregging thing which was: The LS1 ECU in Australia does not have oil pressure wiring because the Commodores do not have a 'real' oil pressure switch The Corvettes in the USA do have oil pressure wiring because Corvettes have a real oil pressure switch. The ECU is the same physical ECU. So what I could do is pull the ECU apart, run 3 more pins and run it to the OEM oil pressure ECU, and the ECU should do this. What actually happened is that Greg did this with some not-so-proper-wiring/connectors to the ECU pins which 'might?' be okay put the car back together, and then the fuel pump wouldn't prime. So you can imagine I immediately undid all this work, put the ECU back into it's original configuration, thought I'd do some more research about what connectors the LS1 Ecu actually uses... and try again later. Except still no fuel pump prime. After a lot of sadness and checking/double checking it turns out it was the relay in the boot that controls the fuel pump. All I did was switch the trigger wires and it worked fine. I looked at the relay and it was covered in bog dust and was unknown years old. It's since been replaced and working fine. After I got the actual connectors, and the wires were ran I gathered my strength and repinned the ECU and Voila! I apologize for these MMS  472164532_8829400773820369_5410969472548349643_n.mp4  And even via ODB2 on the headunit, woo. Now Torque Pro can raise hell on track if it gets too low. It has a wonderful EMERGENCY_DISTRESS_SINGAL style warning if it goes below a certain threshhold. 472585876_9345134268844369_146554337148747327_n.mp4 TLDR: Car great. HFM kit works. So much cleaning. Buy my old stuff. Thanks.   
    • That's a hell of a question right there and so broad that you could get 100 different answers and have them all be correct.  To avoid me typing up a 2000 word thesis that doesn't answer your question, do you have specific things you are unsure of? Does the car currently handle in a way that you don't like? Or is it closer to, you think the car drives fine currently. But you'd like it to be better, but you don't know what that 'better' is or what that 'better' feels like?
×
×
  • Create New...