SPRING PRESSURE CHART  
GEN 4 WG38/40/45/50 Lite & IWG  
7
psi Gen 4 external wastegates are built with 1x7psi middle spring | 7psi Gen 4 IWGs are built with 1x7psi Outer spring 14psi Gen 4 external  
wastegates and IWGs are built. with 1x7psi middle spring + 1x7psi outer spring.  
Refer to this Chart for Custom Spring Applications  
Spring Colour  
Part Number  
Free Length  
TS-0505-2001  
32mm  
TS-0505-2002  
36mm  
TS-0505-2003  
43mm  
TS-0505-2004 TS-0505-2005 TS-0505-2006  
52mm  
68mm  
44mm  
60mm  
44mm  
Outside Diameter  
Spring Location  
29mm  
29mm  
36.5mm  
36.5mm  
Inner  
3PSI  
Inner  
5PSI  
Middle  
7PSI  
Middle  
11PSI  
Outer  
10PSI  
Outer  
7PSI  
Spring Pressure  
Desired Boost  
Pressure  
PSI  
3
BAR  
KPa  
0.207 20.68  
0.345 34.47  
0.483 48.26  
5
7
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
6
0.69  
0.76  
68.95  
75.84  
0.827 82.74  
0.89  
0.965  
1.03  
1.1  
89.6  
96.5  
103.4  
110  
1.172 117.2  
1.241 124.1  
1.31  
1.38  
131  
138  
1.488 144.8  
1.517 151.7  
1.59  
159  
1.655 165.5  
1.793 179.3