Jump to content
SAU Community

Converting Turbo To N/a

GTS4WD

By GTS4WD,
in Engines & Forced Induction

 Share

Recommended Posts

GTS4WD Grand Master

GTS4WD

Posted
Posted

Hay guys..

Im wanting to convert my RB20DET to an RB20DE.

As far as I know..

I need:

Headers

New head (?? Can an Rb25DE head fit without hassle?)

ECU (piggy back or new chip?)

pluming for the new intake

Exhaust flange (???)

Anything I missed?

Thanks in advance guys!

Link to comment
https://www.sau.com.au/forums/topic/153697-converting-turbo-to-na/
Share on other sites
Race_Bred Enthusiast

Race_Bred

Posted
Posted
Why do you want to N/A a turbo engine....?

Just thought i would ask...

i was holding back on that question also....

people waste money to go forwards not backwards,

it would be a better idea to sell the car and buy a non turbo one?

instead of being down on money you will have money left over or you could even upgrade to a 33 non turbo

GTS4WD Grand Master

GTS4WD

Posted
  • Author
Posted

Because I dont know what kind of deadshit drove the cars..

At least with this.. I know everything thats happened to it.. I know how well it runs.. I know that everything is in perfect working order and of a high quality.

I would be wasting more time/money in fixong other peoples problems.

Where as with this.. I can spend 1K save more money.. and easly swap it back to turbo further down the track.

BADR33 Collaborator

BADR33

Posted
Posted

well pretty much all you will need im guessing would be, na ecu, na intake pipe, na exhuast headers, and possibly na injectors oh and to fiddle with the timing. otherwise should be pretty easy.

just find out what people need for converting an na to turbo, and reverse it

SKiT_R31 Experienced

SKiT_R31

Posted
Posted
Your logic makes no sense, however, if you must:

Swap the entire engine over. You can pick up a decent RB25DE for under $1k which will bolt straight up to your existing box & flywheel.

Saves mucking around

I aggree with the above but it doesnt suit your " know everything thats happened to it.. I know how well it runs.. I know that everything is in perfect working order and of a high quality." argument.

Essentially all you need is to remove all the turbo gear, and run some stock headers (or some extractors)

But i would probably take it a bit further than that and revert to N/A Injectors and ECU, also up the compression to something similar to stock whether it be by some shaving/decking and/or NA different pistons - better for fuel economy. Cam etc is the same...

But if i was you.. i would be selling it and buying a second hand RB25, something a little more drivable as an N/A and just as good economy

smurf80 Experienced

smurf80

Posted
Posted

As stated above it wont be any cheaper. It will drive worse than an NA model due to lower compression. Bite the bullet sell it and buy an NA car. U can get tests done to see if you are buying a healthy car or not. Not everyone thrashes the living daylights out of our cars.

Cheers

Chris

andz Mentor

andz

Posted
Posted (edited)

something different :)

u'd be the first to do it

as suggested, sell it and buy a n/a, u'd have money your way, rather than spending it

cant u just get 3rd party insurance

Edited by andz69
  • 3 months later...
Nismo_God Veteran

Nismo_God

Posted
Posted

how much did it end up costing?

not being rude but u would have made money selling the turbo and buying the n/a....not sure that i would spend money when i could make money....also the car is still in the turbo model so it should still have attracted the higher insurance....what did u end up having to do?

scathing Grand Master

scathing

Posted
Posted
Well.. To all you nay sayers..

Its been completed..

4 Door R32 GTS4 with RB25DE.. and it runs as sweet as.

In your original post you said it was an RB20DET going to RB20DE. My engine knowledge isn't encyclopedic, but the last time I checked pulling the turbocharger off an engine didn't give it another half a litre of displacement.

So you basically did what everyone else told you to do, and got an engine conversion.

I fail to see where you're getting "naysayers" from, since the objections people raised to your idea were for a situation you decided not to go through with.

  • 4 weeks later...
Spunky Munky Grand Master

Spunky Munky

Posted
Posted

You know what you need bro? A spinning,snapping, turning, twirling flykick to the head... LOL... nah, seriously bro - why the heck would you want to downgrade... ???????? Man... you're nuts.

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • njdgomez23
      How to fix centre console latch.

      By njdgomez23 · Posted

      After 23 years of owning a Skyline, finally had the latch go.  Followed this guide,  works like a dream again. Great Guide 👍
    • marni
      I need more than help to finish my R33

      By marni · Posted

      Hi all,   I’ve got the biggest lot of problems with my R33 GTS-T   It was a freshly rebuilt 25th anniversary RB25DET (plastic cas, neo cams) probably 6 years ago now   The engine was running so well but I fkd up badly and trusted someone I’d known for 10 years that was well known around Plazmaman for his welding and fab work. I added a lovely photo of some of his previous work. Not sure why my car was worked on by whoever did this shit     I’m normally someone who would never open myself up to something like this, I still can’t believe I did it. Trusting him literally fkd it all up for me. Everything has been a struggle, like it’s almost been 6 years that’s how much I’ve just on and off been trying to work it all out.    All I wanted was a car that danced down low, like full boost from around 3~3500rpm to redline, don’t really care what power it puts down (if it ever does) but I just wanted it to be quick to get on it.    He recommended the turbo to get, I picked Hypergear but he told me to get the front 4” with a T4 and 0.68 rear housing.    I was expecting all these beautiful welds, tidy fab work and paid for it to be ready to go to a tuner when I got it back.    I got a car back that was an absolute mess, I actually couldn’t believe it was my car anymore. I don’t think you could even call what he did welds, they’re disgusting.    So I stripped everything he touched off it and with every bolt I loosened it just got worse and worse.    I covered it and literally built and finished another car in the meantime but now it’s getting to the point where I really want my Skyline back.   Its a struggle because I paid him to do all this shit because I didn’t know how to and now I’ve had to try and figure it all out omg    Please excuse the bird shit horrible welds, I’ve got my show pony car and am so beyond dealing with this car I don’t even really care at this point.    If someone told me about what he did to my car I wouldn’t have believed them but it happened to me. It was unbelievable. He went missing, my car went missing, it came back missing parts, the straight af chassis rails bore the scars of being dragged up a trailer backwards, even the sandwich plate was bent. Everything was leaking and open to whatever fell into it, rounded off/ missing bolts, power steering oil and coolant everywhere, no gaskets, parts stolen off it, even managed to damage the sump pan.   Promised me he’d finish the car, knew what it meant to me, I paid him thousands and thousands just for him to trash it. He told me he was fully licensed and insured, come to find out he’d cancelled his ABN, so obviously no insurance. I had laid up insurance on the car and would’ve been covered but I was scared they would’ve written it off or because the business was no longer trading I’d still be liable.    He was supposed to:  New fully custom mild steam pipe exhaust manifold with turbo location moved from factory position to high forward mount. (I don’t know if it is a mild steam pipe, I’ve got a funny feeling the waste gate isn’t in a very good position and I don’t think the outlets off each cylinder are equal) 4” custom stainless steel dump with external gate (he re-plumbed it) Cut and shut OEM intake manifold with throttle reposition (I ended up doing the throttle reposition) Box in pod filter (left out) New 100cel catalytic converter (pretty sure it’s there but unsure if it’s 100cel) Front mount intercooler piping fabricated to suit (all smashed up and rusty holes where he was supposed to make it look standard where fmic piping passes through. I don’t even think my front bar is going to fit 🙄) Custom 5” intake pipe from pod to turbo (didn’t come with it so had to do something to make it work with the Z32 afm)   Engine: Full cylinder head service & machining  Brand new valves Precision upgraded spring kit Engine block honed New bearings  New piston rings  New ARP conrod bolt kit New ARP head studs Cometic head gasket VRS kit   ATR43SS2 ball bearing turbo 0.68 rear housing  Turbosmart 45mm external wastegate (got delivered to the fab bloke, I’ve got no idea what spring is in it, I’m assuming the one that came pre installed) Walbro 260 fuel pump  Nismo 740cc injectors (tested to 880) Spitfire coil packs GCG FMIC RB25DET manual 5 speed 4:11 rear diff   I’ve got an Apexi Power FC in it atm, I was hoping to just get it to operating temp to make sure everything was okay before towing to a tuner but it’s over-fuelling too much. I don’t think that’s going to happen so i think I’m going to get either a Link G4 or Haltech for it. What do you guys recommend? I can’t work out the power FC so just gonna give up on that one     It’s got an exhaust leak coming from somewhere I can’t see 🙄    The fuel pressure was steady but now it like drops from 40 to 20psi randomly (noticed this yesterday)    I’ll attach pics of the shit he put on my car and the engine bay now as it sits    I really just need some help, I need a tuner in Sydney I can trust, I’d like to be with the car while it’s being tuned if possible, I know it looks terrible but unfortunately I’ve just got to put up with it for now and fix the cosmetic stuff later   Do you guys think the manifolds are going to be okay? Or do I throw the exhaust manifold and try again?   I don’t even think these combinations are going to work tbh   I know everything I fitted was rated to be able to take at least 400kW but most rated higher    If you’ve gotten this far I really really appreciate it 🙏 I don’t mind if you trash me or the car, I made a rookie error and f**k I’ve paid for it. As you’ll see 🙄  
    • r32-25t
      Attesa pump mount options / ideas? R32 gtr style.

      By r32-25t · Posted

      From everything I’ve heard you’ll be waiting a long time for  the parts to arrive 
    • GTSBoy
      R34 Manual conversion Speedometer

      By GTSBoy · Posted

      Have you looked at the workshop manual?
    • GTSBoy
      rb25 gearbox mount options - solid mount?

      By GTSBoy · Posted

      Hmm. I've gotten pretty good outcomes from talking to them about things that I've had go wrong or ideas for improvement. Have had a lot to say about the R32 FUCAs, and they have sent out some replacement parts for those, gratis, on a couple of occasions. Mind you, I have bought a couple hundreds of $ of replacement rod ends for them too!
×
×
  • Create New...