Wastegate Question

[86 TR]

I just finished installing a new Billet wheel, journal bearing 6262 from PTE. I ordered the heavy duty actuator.

With the HD actuator the boost should start around 17-18 psi. I think. I took the car out for a little test run and just blipped the throttle and it spiked to 20 psi boost!

I backed out of course, luckily no knock! Im running the factory wastegate solenoid. Why would the boost spike to 20psi? I havent' ported the wastegate hole yet but I think it should be controlled better than that.

Both vaccum lines for the compressor housing and actuator are in the correct spot!

I don't want to pop a HG. Did I do something wrong? I did have to rotate the compressor housing and center section to line up everything.

BTW this turbo hits hard! I can't describe it. It just blew the tires away on command at any speed!

 

[JC'sGN]

You need to open that hole up and it will be fine.

 

[86 TR]

What's the best way to port this bigger? machine shop, carbide cutting bit?

I see that there is alot of meat on the one side of the housing. Do you offset it or try to make it concentric.

 

[86 TR]

Can this porting be done on the car? Or should I remove the turbo and take it apart?

 

[JC'sGN]

You can do it your self with a air tool and carbide bit, just be sure to mark the housing where the puck contacts it...... I would remove the turbo and put it in a vise.