ct26 turbine wheels, JDM ceramic versus USDM steel, differences? Are they noticeable or negligible? Options

[Darkchylde]

Soooooooo, I have had to send my 26 out to be rebuilt and in the process have found that the turbine wheels need to be changed. The shop that has the turbo says that they can't get the JDM ceramic wheels so they will have to use steel ones.

1) how will this affect my spool time/ Lag? (new to forced induction, understand the basics but am still a little fuzzy on the intricacies)

2) anyone know where to get the ceramic wheels?

3) any one have a JDM importers # or a 26 or 20b they can spare?

Thanks for your input and assistance all.

[korban]

i wanna know what spoolup is like on CT27.

Car gives u a slap in the face somewhere between 2500 and 3000 on a CT20b

On the CT26/T04E 46mm I had, it made a lazy transition into power at 4000 and achieving 18psi by 5000. with only 12psi by 4000, 10 psi around 3000, and barely 3psi under 3000

FYI My CT20b is making 7psi at 3000, 11psi at 3500, 12psi at 4750

[brenton1919]

i wanna know what spoolup is like on CT27.

Car gives u a slap in the face somewhere between 2500 and 3000 on a CT20b

On the CT26/T04E 46mm I had, it made a lazy transition into power at 4000 and achieving 18psi by 5000. with only 12psi by 4000, 10 psi around 3000, and barely 3psi under 3000

FYI My CT20b is making 7psi at 3000, 11psi at 3500, 12psi at 4750

mine is 13psi at 3000 and 15psi the rest of the way... i think i need a different fuel pump because for some reason going from 3rd to 4th now its like 1 2 3 go i need to find the problem its killing my car

This post has been edited by brenton1919: May 10, 2011 - 7:46 PM

[delusionz]

mine is 13psi at 3000 and 15psi the rest of the way...

see thats what a 20b should be like on a 2L 3S-GTE, if you had AWD or RWD that kick right there puts you sideways if your not careful. I assume in your FWD it gives you instant torque steer if you dont lift off the throttle by 3000?

[brenton1919]

[/quote] hey delusionz didn't u say it has he has to grind down on the down pipe? or the waste gate will hit it not allowing it to work right ?

[delusionz]

hey delusionz didn't u say it has he has to grind down on the down pipe? or the waste gate will hit it not allowing it to work right ?

this is my experience with the reverse of what he's doing him st205 turbo on st185 motor, me st185 turbo on st205 motor.

So his should have already cleared fine, but as he's mentioned, he's checked all the clearance and grinded where necessary so that's all good.


Darkchyld: Yeah I didn't realise you clocked it, that explains the need to modify it you're correct there, so if you didnt clock it then it would line up yeah?

On inspection, if you clocked 180 deg CCW, you would have the wastegate actuator infront, then you could make a custom arm coming around the front which goes around and over the downpipe