BOV not working

J

jtaylor1990

Fresh Recruit
Hi guys. Just literally got my GT back on the road yesterday and i get shit loads of chatter back through the turbo. Its meshed at the moment just so i could take it out and set up the actuator as am running a hybrid. Im assuming i get all the chatter because either the spring in BOV piston is too stiff or its blcoked some how. Also has anyone set up an actuator on the CT9 Hybrid? Measures of boost pressures would be appreciated. Im currently working off the measurements for a thread on setting the HKS one up however the internal wastegate arm lengths differ from CT9 to the CT9 hybrid.

Thanks, Josh
 
Nippon

Nippon

Member +
Could be that your spring is too stiff or it may have just siezed up where it hasnt been used.
Take the BOV off, strip it down and give it a clean.
Here is a guide:
http://www.toyotagtturbo.com/forums/showthread.php?82653-Greddy-type-S-Strip-and-clean-(Guide)
Guide is for a Greddy BOV but they are all pretty similar.

As for actuator... I would work off the HKS guide and then use trial and error.
Setup the actuator and give car a run. If boost too low, wind actuator in one turn.
Then run again. Still too low... Wind in another turn. Etc etc.

The actuator works by pulling wastegate shut. The shorter the actuator arm. The more boost it will take to open the wastegate.
 
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