[Supras] Awesome (escessive boost)

[berniek at technicaldevelop.com]

Just remembered setting the ball and spring boost controller on the bench
tto 12 PSI, but forgot that it increases boost by the DIFFERENTIAL
PRESSURE across it, so the boost is really 12+6 = 18 PSI if I'm right,
where 6 PSI is the cracking pressure of the waste gate actuator.  Although
I've temporarily attenuated the pressure transducer output to keep the
dash gauge from pinning, it will not read above about 14 PSI (output
voltage saturates at just under 5V).  From what I have understood about
CT26 turbos, the maximum it should experience is 14 or 15 PSI due to
bearing and shaft size.  The fact that it is 57 trim supposedly does not
enter into that limitation.

Does anyone have any long term experience running a 57 trim CT26 at more
than 15 PSI?  Thanks.

For the future, a better boost controller will be used.  The Dawes
presently used is just a temporary measure.

BernieK