puck sizes

[87GNcospg]

before i put my precision TE44 turbo on i measured the wastegate hole on the exhaust side and the puck in the stock elbow.
the hole was ~.989" and the puck was ~1.130".
is the puck big enough to keep the hole covered?

i am having a problem with not being able to see any boost past 15psi. actually, i was at 18psi for a few weeks and then with no changes i started seeing no more than 15psi.
i turned the BstC off and installed a manual boost controller, exactly like the RJC racing one between the comp housing and wastegate. with the manual controller cranked down i still dont see anytihng past 15psi.

does this lead to the puck not sealing? no exhaust leaks or vacuum leaks.

 

[slimtastic]

the puck size is big enuff to cover the hole but just to see if the puck actually covers the hole id spray the puck with a paint (this is withe the turbo and the elbow off the car typically) then befor the paint dries, bolt the elbow to the housing and slap the puck closed. this will put a mark on the exhaust housing showing where the puck is hitting. also you might have a restriction inthe exhaust or intake.

 

[87GNcospg]

the puck is centered over the whole. i used a little bit of anti seize to make a mark with the puck on the turbo.

i have an open dump with my test pipe so no restriction in the exhaust and i cant imagine there being a restriction on the intake.

 

[2QUIK6]

Have you shortened the WG rod at all to try to increase boost?
I'd suspect a bad WG actuator...maybe the spring is weak in it if you are certain the puck is completely covering the WG hole...if it weren't you'd have terrible spoolup also.

 

[87GNcospg]

Originally posted by 2QUIK6
Have you shortened the WG rod at all to try to increase boost?
I'd suspect a bad WG actuator...maybe the spring is weak in it if you are certain the puck is completely covering the WG hole...if it weren't you'd have terrible spoolup also.

i have shortened the rod to the point where i can just barely get it back on the puck arm. the wastegate is about 4 months old from kirbans, its not the HD one. the spool up is incredible with my DIY boost controller on the car. compared to the BstC, the manual ball/spring controller spools a lot faster. from a dead stop, the tires will smoke at about 7-15mph up until the top of 2nd gear. this wuold show that the puck is sealing since i have great spoolup, right?

the rjc racing controller has a small pinhole drilled in its body. i have not drilled the 1/32" hole yet. would this cause my problem?

 

[2QUIK6]

If the hole is made bigger in the RJC unit, that would cause it to bleed off more boost from getting to the actuator, and would cause just the opposite...over boosting (like me installing the BstC in-line with it yesterday cause now the pinhole and the BstC/solenoid are bleeding off boost).
Sure your boost gauge is reading correctly...I'm out of ideas unless you just have a heck of an exhaust leak.
And I guess you have tried compressing the spring a little further in the RJC unit?

 

[87GNcospg]

Originally posted by 2QUIK6
If the hole is made bigger in the RJC unit, that would cause it to bleed off more boost from getting to the actuator, and would cause just the opposite...over boosting (like me installing the BstC in-line with it yesterday cause now the pinhole and the BstC/solenoid are bleeding off boost).
Sure your boost gauge is reading correctly...I'm out of ideas unless you just have a heck of an exhaust leak.
And I guess you have tried compressing the spring a little further in the RJC unit?

boost gauge is accurate. had a second one on my car the other day. i probably should not drill a hole in my boost controller once i hook up the BstC since the wastegate solenoid will bleed off air along with the manual controller.

im out of ideas too. . i guess i will start from the top again. check all hoses, TB gaskets, plenum gaskets, exhaust leaks, etc. an exhaust leak would cause poor spoolup also so i dont think i have any. ill check again for the 5th time. HAHA

 

[Pronto]

Maybe the actuator is failing? Got a spare to try?

 

[salvageV6]

With your approx. .070" sealing surface it doesn't leave much, if any, room for off center error.

I would suspect the puck.