Jump to content
SAU Community

Recommended Posts

Hi I'm new here.kinda new with the whole turbo thing. I'm tring to find out if i can change my compressor wheel for a later model t04. I changed my turbo that had a f**ked oil seal and the one i put on has a ceremic comp wheel. the old one has a alloy one with like 2 blades off a series 2 r34. It looks like i can. just thought id ask.

Link to comment
https://www.sau.com.au/forums/topic/345844-compressor-wheel-to4/
Share on other sites

And the rest - a turbo is a combination of compressor and turbine wheels.

Changing one could had averse effects - sounds like you have a old donkey T04E and you wanna swap wheels to something newer... which is pointless.

Buy a new turbo.

And the rest - a turbo is a combination of compressor and turbine wheels.

Changing one could had averse effects - sounds like you have a old donkey T04E and you wanna swap wheels to something newer... which is pointless.

Buy a new turbo.

yeah bought a new turbo but its got a ceramic comp wheel. the one off my old pump was alloy just thought the aloy one woulld be stronger

yeah bought a new turbo but its got a ceramic comp wheel. the one off my old pump was alloy just thought the aloy one woulld be stronger

You are correct in assuming this my good man, however ash is right, you shouldn't really mix and match components unless you have the data to support the modification :)

You are correct in assuming this my good man, however ash is right, you shouldn't really mix and match components unless you have the data to support the modification :)

yeah i just thought. if they were the same turbos both off a rb25det just different series that they maybe coulld be a straight swap.

yeah bought a new turbo but its got a ceramic comp wheel. the one off my old pump was alloy just thought the aloy one woulld be stronger

Dude you have your terminology all wrong.

The front/cold side wheel is the compressor wheel, thats on the 'silver' side of the turbo that the intercooler piping connects to, and the turbine or hotside/rear wheel is located on the other side, routed in the exhaust.

No, you can't chop and change parts of a turbo, the best you can do for an upgrade is put a different exhaust housing on, for example I have a GT2860rs garrett turbo, and it's got a .64 A/R (small) housing on the exhaust side, and I'm upgrading to a (larger) .86 A/R housing. In short, it's a better flowing housing that makes more power in the higher rev range.

If you were to put a new compressor wheel on, you'd need to modify or fit a new compressor housing and get the rotating assembly balanced too, and this would allow the turbo to make more power at the same boost level. Slightly more laggier, because the bigger wheel has more rotational intertia (i.e. needs more energy from the exhaust to make it move), but the up-side is the bigger wheel moves more air, and more air + more fuel = more power. But if you already have a small rear housing on the turbo, you'll be fighting a loosing battle, because the engine can only flow as much air as the exhaust can flow out.

In short, save your effort and money, and just upgrade the whole turbo...

p.s. real men don't smoke rubber, real men don't drive like wankers on the road.

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

    • Did this end up working? Did you take some pictures?
    • And finally, the front lower mount. It was doubly weird. Firstly, the lower mount is held in with a bracket that has 3 bolts (it also acts as the steering lock stop), and then a nut on the shock lower mount itself. So, remove the 3x 14mm head bolts , then the 17mm nut that holds the shock in. From there, you can't actually remove the shock from the lower mount bolt (took me a while to work that out....) Sadly I don't have a pic of the other side, but the swaybar mounts to the same bolt that holds the shock in. You need to push that swaybar mount/bolt back so the shock can be pulled out past the lower control arm.  In this pic you can see the bolt partly pushed back, but it had to go further than that to release the shock. Once the shock is out, putting the new one in is "reverse of disassembly". Put the top of the shock through at least one hole and put a nut on loosely to hold it in place. Put the lower end in place and push the swaybar mount / shock bolt back in place, then loosely attach the other 2 top nuts. Bolt the bracket back in place with the 14mm head bolts and finally put the nut onto the lower bolt. Done....you have new suspension on your v37!
    • And now to the front.  No pics of the 3 nuts holding the front struts on, they are easy to spot. Undo 2 and leave the closest one on loosely. Underneath we have to deal with the wiring again, but this time its worse because the plug is behind the guard liner. You'll have to decide how much of the guard liner to remove, I undid the lower liner's top, inside and lower clips, but didn't pull it full off the guard. Same issue undoing the plug as at the rear, you need to firmly push the release clip from below while equally firmly gripping the plug body and pulling it out of  the socket. I used my fancy electrical disconnect pliers to get in there There is also one clip for the wiring, unlike at the rear I could not get behind it so just had to lever it up and out.....not in great condition to re-use in future.
    • Onto the rear lower shock mount. It's worth starting with a decent degrease to remove 10+ years of road grime, and perhaps also spray a penetrating oil on the shock lower nut. Don't forget to include the shock wiring and plug in the clean.... Deal with the wiring first; you need to release 2 clips where the wiring goes into the bracket (use long nose pliers behind the bracket to compress the clip so you can reuse it), and the rubber mount slides out, then release the plug.  I found it very hard to unplug, from underneath you can compress the tab with a screwdriver or similar, and gently but firmly pull the plug out of the socket (regular pliers may help but don't put too much pressure on the plastic. The lower mount is straightforward, 17mm nut and you can pull the shock out. As I wasn't putting a standard shock back in, I gave the car side wiring socket a generous gob of dialectric grease to keep crap out in the future. Putting the new shock in is straightforward, feed it into at least 1 of the bolt holes at the top and reach around to put a nut on it to hold it up. Then put on the other 2 top nuts loosely and put the shock onto the lower mounting bolt (you may need to lift the hub a little if the new shock is shorter). Tighten the lower nut and 3 upper nuts and you are done. In my case the BC Racing shocks came assembled for the fronts, but the rears needed to re-use the factory strut tops. For that you need spring compressors to take the pressure off the top nut (they are compressed enough when the spring can move between the top and bottom spring seats. Then a 17mm ring spanner to undo the nut while using an 8mm open spanner to stop the shaft turning (or, if you are really lucky you might get it off with a rattle gun).
    • You will now be able to lift the parcel shelf trim enough to get to the shock cover bolts; if you need to full remove the parcel shelf trim for some reason you also remove the escutcheons around the rear seat release and you will have to unplug the high stop light wiring from the boot. Next up is removal of the bracket; 6 nuts and a bolt Good news, you've finally got to the strut top! Remove the dust cover and the 3 shock mount nuts (perhaps leave 1 on lightly for now....) Same on the other side, but easier now you've done it all before
×
×
  • Create New...