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R34 Gtt Turbo Change

Maru

By Maru,
in Engines & Forced Induction

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Maru Apprentice

Maru

Posted
Posted

Hi there!

Unfortunately I am to replace the turbo on my sisters R34 GTT (RB25) :thumbsup:. The new turbo doesn't have any water cooling so I was just wondering... what should I do with the water-piping? Should I keep them connected, thus letting the water circulate through them... or can I remove the pipes and plug the holes?

Any ideas would be most appreciated!

I probably have a few more questions later on too as I move along, that new turbo of hers doesn't seem to fit in naturally anywhere lol.

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Maru Apprentice

Maru

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Thx for the really quick replies! :thanks:

It's called IRX450... at least the exhaust-flange seems to be right... but the compressor housing is too big and touches the exhaust manifold, but I think I can solve that with a couple of extra flanges in between and some longer bolts. Also I need to turn the compressor housing in an angle that doesn't allow the wastegate-vaccuum-thing to align with the wastegate-arm-thing, so I need to make modified linkage between them... ah well, that's for later tho. :rolleyes:

Ok, then I shall remove the water piping and plug it... just to really make sure/double check... it's not going to block any other essential circulation right?

C8.png

(away for some hours now)

Maru Apprentice

Maru

Posted
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Posted (edited)

Ah yea, worry not! Because if I manage to fit that turbo there's a Link G4 unit, a new intercooler, 530cc injectors, walbro fuel pump and a new clutch in a box right next to the car... and I'm supposed to have it all done and fitted til april 17th... which is when she's got a time for mapping... *sigh* :ermm:

Just curious; if one were to only fit that turbo and run the car on all the original settings... what would happen? Would it boost too hard? Run lean?

Is that your GT-T in the picture? It looks nice, hers is black. GT-R spoiler and alloys, no?

Edited by Maru
Randon_I_Am Veteran

Randon_I_Am

Posted
Posted

Yeah its mine, cheers. Just GTR wheels, gtt spoiler.

I imagine it would run rich as fark and hit r&r with very little boost. Although I hasn't googled what that turbo is, so it's anyones guess. But it'll drive around alright as long as the foot doesn't hit the floor...

Glad to hear ya have the supporting mods to go with it :)

lachlanw Veteran

lachlanw

Posted
Posted

car will not run / be drivable with no tune and injectors fitted

car would run and be drivable with everything else fitted . do not get it on boost. eg driving to dyno place

you called it a link . where bouts in nz are you ?

Maru Apprentice

Maru

Posted
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Good luck with the upgrade, hope your sister has many cases with which to pay!

Thanks I'll prolly need it hehe, wow... it took a lot of heat to lose the manifold studs. Sorry for being slow, what sorta cases?

car will not run / be drivable with no tune and injectors fitted

car would run and be drivable with everything else fitted . do not get it on boost. eg driving to dyno place

you called it a link . where bouts in nz are you ?

Ic ic, that sort of makes sense, I guess they'd let out more fuel. We'll probably take the car on a trailer to the dyno place for good measure.

I'm in Scandinavia actually, sorry for barging in on a aussie forum like this. There's a native Skyline forum around, but since it's a relatively rare car here, it's a small community... so it might be aeons before anyone replies.

  • 3 weeks later...
Hanaldo Grand Master

Hanaldo

Posted
Posted

Just another quick question... I'm going to refill the coolant now - is there anything I need to do to get the air out of the system or does it take care of that on its own?

After filling it with coolant you need to make the radiator the highest point on the car so the air can get out, otherwise you will get airlocks. Very simple, just undo the radiator cap and jack the front of the car up. Then cut a 2L coke bottle (or similar) in half and put it in the radiator hole. Keep topping the coolant up until all the bubbles have stopped (shouldn't take too long).

Galois Veteran

Galois

Posted
Posted

After filling it with coolant you need to make the radiator the highest point on the car so the air can get out, otherwise you will get airlocks. Very simple, just undo the radiator cap and jack the front of the car up. Then cut a 2L coke bottle (or similar) in half and put it in the radiator hole. Keep topping the coolant up until all the bubbles have stopped (shouldn't take too long).

+1

Maru you're just topping up the coolant, not doing a flush right. That's a bit more involved...

  • 1 month later...
Maru Apprentice

Maru

Posted
  • Author
Posted

...and now the head gasket is blown! lol

Sorry for jolting this old thread, just felt it sort of added to the story this way.

Obviously I've been summoned for this repair, since it's very labor intensive and would cost a lot in any shop, and I have til friday to do it. unsure.gif

Was just wondering if anyone could give me directions to a good "replace RB25 head gasket" thread/site?

A few questions that instantly comes to mind is torque settings, order in which to tighten the head, can I leave the intake and exhaust manifolds on, other good to know things.

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