CT26 turbo specs

[girraffe]

I was cruising this section about a year ago and came across some people talking about the factory wheel trims for the CT26 turbos on the 1hd-t etc. does anyone have that information? I tried searching but cant find it.

What im looking for is the differences in the 1hd-t turbo and the supra turbos.

Thanks

 

[gbentink]

Both 65mm exducer
1HDT: 43mm Inducer
7MGTE: 47mm Inducer

 

[girraffe]

ok here is the data i was looking for but if you look at both of these links the wheel specs are conflicting yet look to be from the same company. what is correct?

http://www.melett.com/turbo-parts-catalogue/toyota/Toyota-ct26.pdf

http://my80isfantastic.fr/dossiers/fichiers/Toyota_CT26.pdf

 

[gbentink]

Melett is "more" correct. I can only suggest that different countries received different specs. I know that in the 1JZGTE the turbo specs were diferent from JDM to USA. The second website is just plan wrong.

In any case, I have measured them with a vernier, thats how I know. Not so easy to measure either, since there is an uneven number of blades.....

I have both types rebuilt in my shed ready for sale and another high flow version. I have had 3 Supra comp wheels and all have been 47mm. I have measure 3 sizes. 43/46/47. The 46mm is from the 1HDFTE.

 

[girraffe]

Melett is "more" correct. I can only suggest that different countries received different specs. I know that in the 1JZGTE the turbo specs were diferent from JDM to USA. The second website is just plan wrong.

In any case, I have measured them with a vernier, thats how I know. Not so easy to measure either, since there is an uneven number of blades.....

I have both types rebuilt in my shed ready for sale and another high flow version. I have had 3 Supra comp wheels and all have been 47mm. I have measure 3 sizes. 43/46/47. The 46mm is from the 1HDFTE.

ok so if the 1hdfte is 45.5-46mm it would be the same chra as the supra turbo on the melett page. therefore melett is incorrect??

 

[gbentink]

Melett lists specs which are not found in Australian vehicles as far as I have measured - and I have measured a few. So, for Australia in my experience it is incorrect. As for other countries like UK, it may be correct. Toyota fit different specs for different smog laws in some cases.

45.5mm is not 46mm and will not operate correctly (ie: as efficiently as designed) in a housing machined for 46mm.

The exhaust turbine and CHRA (excl comp wheel) is the same in all cases except for the 1HDFTE and 3rd gen 3SGTE which uses a smaller turbine shaft (48mm exducer vs 52mm exducer for CT26). CT26 is not stamped on the compressor cover of the 3rd gen 3SGTE or the 1HDFTE. These are what many people call "CT20B" however this is not an official name. The 7MGTE went out of production before either the 3rd Gen 3SGTE or the 1HDFTE hence it remains the largest factory configuration of CT26.

It has been said by some that the 7MGTE CT26 47mm inducer is a GT spec. All I can say is that all 3 I have measured have been 47mm, so maybe I am just lucky.