Will a turbo with a internal wastegate rigged to stay permanently open make boost?

[EldarO]

Yeah it's not hard to drive any turbo engine off boost if you keep an eye on the boost gauge and modulate the throttle.

as long as its not a 1J.

[Norbie]

I had no problems doing it with my 2JZ, even in sequential mode.

[GT1978]

I'd be a bit worried how well a stock ECU will handle the lower compression and the different flow characteristics of the turbo exhaust manifold and the intake manifold.
Really depends on how flexible the stock ecu is I guess.

[annoyingrob]

Why not remove the cold side, and center section from the hotside, then bolt a plate over the hole in your hot side? Instant N/A

[MR 1JZ]

Why not remove the cold side, and center section from the hotside, then bolt a plate over the hole in your hot side? Instant N/A

this is the best idea in this thread...

[JustenGT8]

Hmmm so just have turbine housing on there? Nice solution. i don't think the exhaust gases would hurt any of the sealing surfaces....will need a good clean after to get ride of any carbon.

[GT1978]

That is a good idea. I wonder what sort of an exhaust note that will produce.

[celicapain]

i dont spose just putting the standard ex manifold on is an option

[stidnam]

Got a standard rwd manifold but I don't want to stuff around with fitting the exhaust piping to this and then changing it again for the turbo setup pretty damn soon.

I like the idea of just the exhaust side of the turbo. will likely give this a go as I have to rotate the turbo housings anyway so I'll just pull it off for a while.

[Ben Wilson]

Except TD04s don't bolt together, the 'plate' would have to be turned up. If you've got access to a lathe it would be a fairly simple job.

How about just blocking the compressor outlet? That should stop the turbo from over speeding...

[JustenGT8]

Except TD04s don't bolt together, the 'plate' would have to be turned up. If you've got access to a lathe it would be a fairly simple job.

How about just blocking the compressor outlet? That should stop the turbo from over speeding...

Nope, will still overspeed as it's a turbine remember, not as pump. If there's no airflow a turbine will actually speed up as it's not doing any work. Try blocking the outflow of an electric fan and you'll hear it noticeably speed up

[Ben Wilson]

Doh - I hate summer colds, they make my brain all mushy..

Yeah - Like Justen said, don't do that

[MRMOPARMAN]

disconnect the intake after the turbo and put something, eg milo can with hole in end for some restriction?? just make sure ya clamp it good! or maybe an old throttle body set 1/2 open

[stidnam]

Ok been busy with the tools and have come up with the follow.

I have pulled off the exhaust housing as I needed to remove it anyway to rotate the housing. For the TD04L there is a locating pin in the exhaust housing that slots into the centre bit of the turbo whatever this is called. See below



As you can see to fit a plate over this hole the pin must be ground flat. I will be doing this because I need to do this as the exhaust housing can't be rotated with this still there (well it can but you will have to drill another hole in the centre bit in the desired position).

So basically all that is left is to get a circular bit of metal to clamp in place. To ensure a good seal also use exhaust gasket goo before clamping the blank off plate in place.



When done make up the rest of the exhaust system (not mentioned is that you should put the turbo back together so that you can get the positioning correct when you make up the exhaust system).

Once I am happy with the motor being run in I will pull this off and reassemble the turbo and bolt back in place with no additional mods needed to the exhaust as it will have already been made.

[JustenGT8]

Just pull the pin out mate, just takes a little work with the vice grips