Tial External Wastegate Spring Options 0.25-1.60 bar/3.6-23.2 psi
Tial 38mm External Wastegate Spring Options 0.25-1.60 bar/3.6-23.2 psi
Tial 38mm external wastegate comes standard with the 0.5 Bar Spring (~7 PSI). You can select different springs for additional boost and combine a SMALL & LARGE spring to go beyond 1.0 BAR. For example, combine a 0.5 BAR (Small Green) with 1.0 BAR (Large Blue) spring, and you'll get 1.5 BAR combination.
*Made specifically for the F38 & WG38 Tial Wastegate.
YOU CAN ONLY INSTALL A MAXIMUM OF 1 LARGE AND 1 SMALL SPRING PER WASTEGATE!
BAR PSI DESCRIPTION O.D.
0.250 3.626 Small Yellow 1.875 In
0.400 5.802 Small Red 1.875 In
0.500 7.252 Small Green 1.875 In
0.600 8.702 Small Blue 1.875 In
0.700 10.153 Large Yellow 2.360 In
0.800 11.603 Large Red 2.360 In
0.900 13.053 Large Green 2.360 In
1.000 14.504 Large Blue 2.360 In
1.100 15.954 ** ( ex. Lg Yellow + Sm Red ) Small + Large
1.200 17.405 ** ( ex. Lg Red + Sm Red ) Small + Large
1.300 18.855 ** ( ex. Lg Green + Sm Red ) Small + Large
1.400 20.305 ** ( ex. Lg Blue + Sm Red ) Small + Large
1.500 21.756 ** ( ex. Lg Blue + Sm Green ) Small + Large
1.600 23.206 ** ( ex. Lg Blue + Sm Blue ) Small + Large
*This spring will not work with MVS Wastegates.
** Higher Pressure Settings require the use of both
Small and Large diameter springs. When using a Dual
Spring setup the resultant pressure is equal to the sum
of the individual springs.
Note: Boost pressures are only an approximation
based on intake manifold pressures equaling exhaust
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