Upgraded CT26

[Backlash2032]

Hey guys. I had a few questions regarding upgraded wheels. I have access to CNC lathes at school and I was thinking it would be fairly simple to make my own upgraded CT26. Basically I had two questions for you guys. One of them is kind of a moot point, since I have mics and what not.. But I was looking at wheels today and I wasn't sure what wheels would fit on the factory shaft. So if anybody has a turbine shaft or better yet, a compressor wheel to measure, that would be greatly appreciated.


Second thing... Obviously you need to bore the compressor housing to the inducer and exducer diameters... plus .020" or so (also, what clearances SHOULD there be?) But what happens in the middle? Is it just a simple radius to blend the two diameters? Just a radius tangent to both the inducer and exducer? Any help there is also greatly appreciated...

Thanks!

 

[suprarx7nut]

There's certainly more than this to the situation to consider, but familiarizing yourself with the turbo specs for play is probably a good start. You know it'll move at least that much.

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=TC&P=6

Here's a cross section of the shaft. No measurements, but gives you an idea what's going on there.

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=TC&P=14

 

[Backlash2032]

I've rebuilt turbos in the past, and am very well versed in that side of things. Thank you for your input though! 😁

I talked to my instructor about it today, and we came up with an idea to sketch out the radius using the compressor wheel (Garrett T04E 57 trim should be here soon...) Mounted to the turbine shaft, sitting in a vblock and an optical comparator. It's pretty self explanatory if you know what a comparator does.

Hopefully it turns out well! If it does you guys just may have a cheaper option for 57 trims...

Sent from my HTC6525LVW using Tapatalk

 

[GC89]

Remember you'll still have to send it out to have the rotating assembly high speed balanced once your done.