Turbosmart WASTEGATES – EXTERNAL - Ultra-Gate 38 (no locking ring) - Manual (Page 3)

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Poor Flow – 90 Degree Mounting
90 degree mounting gives poor exhaust flow to the Ultra-Gate38
and in some circumstances may contribute to over boosting.
Not recommended – Less than 90 Degree Mounting
An angled mounting as shown is not recommended and gives
extremely poor exhaust flow to the Ultra-Gate38.
ACHIEVING YOUR TARGET BOOST PRESSURE
There are various factors involved in achieving your target boost pressure including.
- The size of the spring fitted in your wastegate i.e. the boost pressure achieved by the wastegate spring only.
- The desired level of boost pressure and the difference between this and your wastegate spring pressure.
- The size of your turbocharger and wastegate and the resulting exhaust manifold backpressure in your system.
Turbosmart recommends the ideal setup for achieving your target boost pressure is to use the Ultra-Gate38 in conjunction
with a Turbosmart eBoost controller.
IMPORTANT NOTES ON SETTING THE WASTEGATE SPRING PRESSURE
A stiffer spring should only be used when necessary. The Ultra-Gate38 allows for different combinations of spring pressures. All springs
that are adaptable with the Ultra-Gate38 are shown in the table below. The tuner can use combinations of the 3 springs to achieve the
following base boost pressures. To aid in the identification of these springs they are supplied colour coded. If this colour coding is not
clear please use the dimensions in the following table to identity the wastegate spring. Please see the following detailed instructions on
setting your Ultra-Gate38’s spring pressure. The springs chosen should be rated to the lowest boost level desired.
Pressure rating 5 PSI Inner 7 PSI Inner 7 PSI Middle 10 PSI Middle 14 PSI Middle 7 PSI Outer
Part number TS-0501-2003 TS-0501-2004 TS-0501-2005 TS-0501-2006 TS-0501-2007 TS-0501-2008
Colour GRN/GRY GRN/WHT GRN/PUR GRN/BLU GRN/RED GRN/PNK
Dimensions
36.5mm OD,
55mm length
36.5mm OD,
93mm length
49mm OD,
118mm length
49mm OD,
71mm length
49mm OD,
86mm length
59mm OD,
63mm length
Desired Boost
Pressure
KPa BAR PSI
34.47 0.345 5 ▲
48.26 0.483 7 ▲
68.95 0.69 10 ▲
82.74 0.827 12 ▲ ▲
96.53 0.965 14 ▲
103.4 1.03 15 ▲ ▲
117.2 1.172 17 ▲ ▲
131 1.31 19 ▲ ▲
144.8 1.448 21 ▲ ▲
151.7 1.517 22 ▲ ▲ ▲
165.5 1.655 24 ▲ ▲ ▲
179.3 1.793 26 ▲ ▲ ▲
193.1 1.931 28 ▲ ▲ ▲
Changing the springs
Exhaust gas
to exhaust
pipe
Wastegate
Turbocharger Turbine
Exhaust gas
to exhaust
pipe
Wastegate
Turbocharger Turbine
Exhaust Gas
from manifold
Exhaust Gas
from manifold