Post by
C-Kwik »
https://forums.nicoclub.com/c-kwik-u426.html
Fri Jun 13, 2003 8:19 am
No such thing as a TO4H AFAIK. The T04B has an H-# trim as erich mentions. But 57 trim seems more inline with the T04E compressor. A fairly decent match, but as you approach boost levels upwards of 15 psi, you may be getting quite close to the surge line with a KA. Especially with a T3 turbine. If you can find out the size of the minor diameter, then that could confirm which turbo. Having the outer would help too, but that would only show the difference between the T04E and the Super T04E.
erich: as far as a T04B H-3 being too big, it does not seem to be the case. I've mapped it and the KA will work with it just fine. The T04E series are actually bigger than the T04B (excluding the 60-1 and 62-1). If the H-3 was too big, then most T04E's would probably be too big. But many run T04E's and so far the most power full stock bottom end turbo KA's run T04E compressors.