[Mk2] [Turbo] Can anyone help me identify this smoking issue?? VIDEO

[2mad]

Pics Jim ..








Only pics i could find

[alex687]

A 60-1 wheel is basically just too large for the ct2x turbine.

So, looking at picture earlier in the thread would you say that is a standard exhaust turbine?

It's almost as if it's a half finished hybrid turbo. Hybrid compressor but stock exhaust side? could that maybe explain the boost creep I was suffering from before I fitted a restrictor ring.

Cheers for all the help guys, I'm slowly building up enough ammo to fire at TT when I next ring them.

Either way it looks like I'm gonna have to spend a fortune before I get my hands on a nice shiny rebuilt/new turbo

[2mad]

Almost all hybrids have a stock turbine wheel .. i've owned 2 and they were both stock .. some do do the turbine but it is rare

Seen a hks ct26 and the turbine was massive

[mr2magic]

A 60-1 wheel is basically just too large for the ct2x turbine.

So, looking at picture earlier in the thread would you say that is a standard exhaust turbine?

It's almost as if it's a half finished hybrid turbo. Hybrid compressor but stock exhaust side? could that maybe explain the boost creep I was suffering from before I fitted a restrictor ring.

Cheers for all the help guys, I'm slowly building up enough ammo to fire at TT when I next ring them.

Either way it looks like I'm gonna have to spend a fortune before I get my hands on a nice shiny rebuilt/new turbo

Difficult to say from just the pics but I would imagine so. A better clue would be to measure the turbine exducer and compressor inducer diameters and compare these to stock.

[alex687]

Almost all hybrids have a stock turbine wheel .. i've owned 2 and they were both stock .. some do do the turbine but it is rare

So surely all hybrids have a compressor/turbine mismatch??

[2mad]

Almost all hybrids have a stock turbine wheel .. i've owned 2 and they were both stock .. some do do the turbine but it is rare

So surely all hybrids have a compressor/turbine mismatch??

I've still got a blitz hybrid .. larger compressor, bored out intake .. stock turbine


Can post pics ..


Sorry if i miss read your post

[mr2magic]

Almost all hybrids have a stock turbine wheel .. i've owned 2 and they were both stock .. some do do the turbine but it is rare

So surely all hybrids have a compressor/turbine mismatch??

In a nutshell...yep...they either sacrifice low end or top end. This isn't always so bad.....a T04E with 50 or 57 trim are higher flowing without sacrificing too much bottom end.

The T04E 60 trim or the t04b 60-1 trim are oversized (weight and trim) in my opinion.

What also used to be done was to 'clip' the turbine (usually about 15-20 degress) to improve high end flow

[2mad]

Almost all hybrids have a stock turbine wheel .. i've owned 2 and they were both stock .. some do do the turbine but it is rare

So surely all hybrids have a compressor/turbine mismatch??

In a nutshell...yep...they either sacrifice low end or top end. This isn't always so bad.....a T04E with 50 or 57 trim are higher flowing without sacrificing too much bottom end.

The T04E 60 trim or the t04b 60-1 trim are oversized (weight and trim) in my opinion.

What also used to be done was to 'clip' the turbine (usually about 15-20 degress) to improve high end flow

Absolutely but most stick with a stock turbine

[mr2magic]

As long as your compressor stays in the 50 - 57 trim region i don't see a problem with choke or surge and the reliability is proven.

[2mad]

Hybrid Ct26 can produce boost 5500rpm to red-line .. dont think the turbine flows as well as a ct20b's .. just my 2p

[mr2magic]

The drop off of boos beyond 5500 rpm on the ct26 has nothing to do with the compressor and everything to do with the exhaust housing and it's A/R which is just to small to cope with the increased flow

[2mad]

The drop off of boos beyond 5500 rpm on the ct26 has nothing to do with the compressor and everything to do with the exhaust housing and it's A/R which is just to small to cope with the increased flow

I know .. sorry if i didnt explain my self better thats why the ct20b's turbine flows better

[nathan.z]

If you're spending that much cash why not upgrade to a CT20b like the Rev3's so you have boost till red line. Could pick up a second hand hybrid CT20b for those prices or an even better turbo from a breaking build.

[alex687]

If you're spending that much cash why not upgrade to a CT20b like the Rev3's so you have boost till red line. Could pick up a second hand hybrid CT20b for those prices or an even better turbo from a breaking build.

I dunno, i'm not too keen on getting a second hand one. My hybrid 26 had no problems boosting to the red line. As I mentioned it used to suffer from horrendous boost creep. unfortunately I've never experienced anything else so I don't know much about different turbo characteristics. So I don't know if mine was laggy or lacking bottom end or whatever. All I know is it made the car shift at a fair rate!! Whatever happens I don't wanna end up with less power

[2mad]

If you're spending that much cash why not upgrade to a CT20b like the Rev3's so you have boost till red line. Could pick up a second hand hybrid CT20b for those prices or an even better turbo from a breaking build.

I dunno, i'm not too keen on getting a second hand one. My hybrid 26 had no problems boosting to the red line. As I mentioned it used to suffer from horrendous boost creep. unfortunately I've never experienced anything else so I don't know much about different turbo characteristics. So I don't know if mine was laggy or lacking bottom end or whatever. All I know is it made the car shift at a fair rate!! Whatever happens I don't wanna end up with less power

I ported my wastegate (ct20b) can post pics if you want to see how i did it .. no more creep ... took 2 days though with a dremel and carbide cutter

[bobhatton]

A 60-1 wheel is basically just too large for the ct2x turbine.

So, looking at picture earlier in the thread would you say that is a standard exhaust turbine?

It's almost as if it's a half finished hybrid turbo. Hybrid compressor but stock exhaust side? could that maybe explain the boost creep I was suffering from before I fitted a restrictor ring.

Cheers for all the help guys, I'm slowly building up enough ammo to fire at TT when I next ring them.

Either way it looks like I'm gonna have to spend a fortune before I get my hands on a nice shiny rebuilt/new turbo

Just get it back from TT and send it down to me, I will sort it out for you and let you know what you have.

[alex687]

Got my "standard" ct26 back from TT today and thought I'd share with you a load of pics.










The perspective makes it look wrong but the verniers are near enough inline with the inner diameter of the exducer.













as you can see, the turbine has seen better days. both the turbine and compressor are not magnetic - that mean they are ceramic?. TT told me it had a ceramic shaft... looks and feels like steel to me and it is magnetic.

Any help identifying whether this is a hybrid or what's been done to it much appreciated. TT told me the compressor wheel and housing are standard but having done plenty of googling I have to disagree.

Bob I'd like to send it down to you as you seem much more cooperative and helpful that TT but at the same time I would ideally find somewhere more local where I can take it in and speak to someone face to face. I am off away this week so will have to put it on hold for a bit either way

[mr2magic]

That compressor is almost certainly a 60-1 wheel.

[2mad]

That compressor is almost certainly a 60-1 wheel.

Agreed ... that is the makings of a hybrid



To get better flow you need a clip on the turbine

[alex687]

what does clipping the turbine involve? cutting a bit off each turbine blade?

I think I need a new turbine wheel before I look at that option!