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Old 11-04-2021, 08:34 AM   #51
ortho stice
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Have you pulled the CBV off to check the diaphragm yet? This idea that the turbo is “bad” doesn’t make a ton of sense to me. Why is it bad? How is it bad? Throwing another turbo at it might put you right where you are today.
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Old 11-04-2021, 10:56 AM   #52
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Passing smog test does not say anything about clogged cat. Ask me how I know...
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Old 11-04-2021, 05:33 PM   #53
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Pull the down pipe.
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Old 11-04-2021, 06:30 PM   #54
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How difficult is to obtain exact psi boost reading and be done with guessing about the turbo?

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Old 11-05-2021, 11:16 AM   #55
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Quote:
Originally Posted by Studie View Post
No clogged cat. The car passes SMOG with no problem with flying colors.
I'm thinking perhaps its time for a new turbo.
Doesn't test under load, which is when the restriction will **** your backpressure & kill boost

Not hard to unbolt the DP & wedge a screwdriver in there to maintain a gap (leak), drive around the parking lot. You will know immediately if the symptom is resolved.
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Old 11-05-2021, 12:22 PM   #56
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If that is a low pressure turbo the waste gate actuator would be set at about 4 psi. When I was running one of these on my 88 765 I used a washer between the compressor housing and the actuator on each of the 2 bolts to move the actuator as it wasn't adjustable. Ended up with 7 psi.
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Old 11-12-2021, 10:23 PM   #57
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Re-seated the preloading arm to a bit more than half of the hole. Changed the fuel regulator and deleted the sponge in the airbox.

Added a whole tank with some octane boost and injector cleaner, ran the car for a long drive and voila we are back in business!

There is nearly half of the positive boost on the OEM gauge at WOT. Car runs well, flushed the engine, and replaced the oil with Liquimoly 5w40 + MOS2 treatment since we get super cold winters here, and planning to do the coolant tomorrow. Car is idling perfectly.

Will pull the downpipe and get the exhaust worked on over the winter, hopefully, see some more power with this dinky 13c turbo.

I guess it's time for a manual boost controller?!
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Old 11-15-2021, 09:43 PM   #58
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You won't really get more than 12 useful psi put of it but fo for it! Even a small bump in boost really wakes these cars up
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Old 11-15-2021, 10:12 PM   #59
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Quote:
Originally Posted by Wilford Brimley View Post
You won't really get more than 12 useful psi put of it but fo for it! Even a small bump in boost really wakes these cars up
Indeed - I'm only running 5-6psi on my 13c Regina +T, and it's night & day from a stock Regina/Rex
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