JerryJS8
der Junge
- Joined
- Sep 12, 2004
- Location
- Normal Saxony
Finally got the new parts in the mail yesterday. Everything balanced and shiny!
Broken vs. Not-Broken
Just one problem, my housing is not big enough for the 60 trim wheel... I bought another turbo that the seller thought was a 60 trim to get a compressor housing on the cheap, but no luck. Turned out to be just another 50 trim So, I made a call at work and was able to get some technicians involved to up the professionalism!
With a 5-achse CNC it's easy to shoot out the parts you need with the right model, difficult part is not having the geometries for the new wheel... So we went around and saw what fun toys, I mean tools, we had at our disposal.
Our first lab had a pretty nice unit, but only gave us a window of about one square inch. The lab next door works at the micro level and could have measured the hills at valleys of the polished turbine surface, pretty nice, but the turbine is a bit larger than 170 microns... On the other side of the machine park we found some more appropriate materials for that which had to be done.
Quick pic of a working model, not the final result...
So a couple of hours later we had a "prototype" made up and checked the fit as best we could.
The new turbine should be a direct replacement, but the radii and trailing edges actually had some different angles once compared to the stock compressor housing. So I'm glad we measured the turbine and not the housing. Tomorrow morning we'll machine the housing with the current model which has a 0.6mm (0.0235") wheel to housing gap and see what becomes of it! Measuring the stock housing, the 50 trim has a 0.45mm gap, but the stock 6+6 blades are shorter and smaller in diameter than the billet wheel. So that's why I went with 0.60mm, otherwise with the journal bearing play allowing the shaft to tilt, the tips might risk scraping against the housing. Worst case scenario we need to try again. No problem though, I got another housing or two laying around the garage
Broken vs. Not-Broken
Just one problem, my housing is not big enough for the 60 trim wheel... I bought another turbo that the seller thought was a 60 trim to get a compressor housing on the cheap, but no luck. Turned out to be just another 50 trim So, I made a call at work and was able to get some technicians involved to up the professionalism!
With a 5-achse CNC it's easy to shoot out the parts you need with the right model, difficult part is not having the geometries for the new wheel... So we went around and saw what fun toys, I mean tools, we had at our disposal.
Our first lab had a pretty nice unit, but only gave us a window of about one square inch. The lab next door works at the micro level and could have measured the hills at valleys of the polished turbine surface, pretty nice, but the turbine is a bit larger than 170 microns... On the other side of the machine park we found some more appropriate materials for that which had to be done.
Quick pic of a working model, not the final result...
So a couple of hours later we had a "prototype" made up and checked the fit as best we could.
The new turbine should be a direct replacement, but the radii and trailing edges actually had some different angles once compared to the stock compressor housing. So I'm glad we measured the turbine and not the housing. Tomorrow morning we'll machine the housing with the current model which has a 0.6mm (0.0235") wheel to housing gap and see what becomes of it! Measuring the stock housing, the 50 trim has a 0.45mm gap, but the stock 6+6 blades are shorter and smaller in diameter than the billet wheel. So that's why I went with 0.60mm, otherwise with the journal bearing play allowing the shaft to tilt, the tips might risk scraping against the housing. Worst case scenario we need to try again. No problem though, I got another housing or two laying around the garage
Last edited: