Precision Turbo and Engine Precision Turbo & Engine PW39 Wastegate - Manual (Page 7)

PART NUMBER: PBO085-1000
NAME: PW39
DESCRIPTION: 39MM EXTERNAL WASTEGATE
Boost controller installation recommendations
A. Spring Rate Controlled Method
If you want to use spring rate to control boost level, install boost signal hose from the compressor cover
hose barb, to the bottom banjo barb port of the wastegate can. You will leave the top banjo barb port
unused and vented to atmosphere. Secure the hose connections with either zip ties or hose clamps,
making sure to route hose away from high heat sources. Using this method, your boost level will be
determined by the spring/springs used and back pressure.
A. B.
B. Manual Boost Controller Method “bleeder valve”
Install boost signal hose from the turbocharger compressor cover hose barb, to the bottom of a plastic
Tee. Install one hose from one port of the Tee, to the bottom banjo barb port of the wastegate can. Install
a second hose from the other side of the Tee, into the inlet of your manual boost controller. (Refer to
your manual controllers instructions to determine which port is inlet port.) Install another hose from the
outlet port of the manual boost controller, to the top banjo barb port of the wastegate. Secure all hose
connections with zip ties or hose clamps. Make sure to route all hoses away from high heat sources.
With the manual boost controller closed, so that no boost signal pressure passes through it, the
wastegates spring rate should control boost levels. Opening the manual boost controller applies pressure
to the top of the wastegate, delaying the valve from opening, effectively raising your boost levels. Once
you have achieved your desired boost level, no further adjustment of the manual boost controller is
necessary. CAUTION: Precision Turbo recommends that the air/fuel ratio be checked while setting
the boost levels. Raising your boost levels will change the air/fuel ratio of your tune up and could
cause engine detonation to occur.
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