Want To Boost 5psi on your 1G?

[TimG]

Today was the worst day of my turbo life. I was sick of leaking at 9psi, so I did an intake leak test. Found my leaks and fixed them. Got into my car, pull on to the main road but I couldn't haul past 5psi. It wasn't like I hit 5psi fast and then leaked. It was at 3k rpm, I was at 3psi, 4k rpm, I was at 4psi and at 5k rpm, I was at 6psi.

Reason - had a PCV valve holding back boost vacuum pressure to the wastegate. I don't understand how it works and by what I've learned, I shoulda been spiking just like I had no vacuum lines hooked up at all. Max boost. Instead, I was gradually gaining up to 6 psi up to 5000rpms.

I had the wastegate/BOV vacuum line hooked up to the PCV valve line coming from the intake manifold. I didn't realize that the PCV restricts air flow to the turbo vacuum.

LESSON LEARNED - If doing a turbo conversion and you want to hold 6psi and no more for cheap. Hook up a PCV valve in between your wastegate/BOV vacuum line going into your intake manifold.

 

[mavisky]

well at least you didn't break anything.

 

[TimG]

Doesn't make any sense to me but hey, I learned something new.

 

[supergoat]

cool! That may be my "save the dying clutch" mod.

What I don't understand is, how can you put a PCV valve in the BOV/wastegate line? My BOV line goes straight to my intake manifold. Or did you splice a new line running from your BOV and wastegate? The only line I have coming from my wastegate run directly into my turbo compressor housing with my MBC mounted between them. So should I replace my MBC with the pcv valve for the same effect?

Also, which way was it facing?

And yes, I'm serious about this becuse my clutch it hating that the lowest setting I can have right now is 8psi.

 

[mavisky]

Originally posted by supergoat
cool! That may be my "save the dying clutch" mod.

What I don't understand is, how can you put a PCV valve in the BOV/wastegate line? My BOV line goes straight to my intake manifold. Or did you splice a new line running from your BOV and wastegate? The only line I have coming from my wastegate run directly into my turbo compressor housing with my MBC mounted between them. So should I replace my MBC with the pcv valve for the same effect?

Also, which way was it facing?

And yes, I'm serious about this becuse my clutch it hating that the lowest setting I can have right now is 8psi.

oh quit crying and order up the $180 clutch kit that i did. it'll hold just fine then.

 

[TimG]

Originally posted by mavisky


oh quit crying and order up the $180 clutch kit that i did. it'll hold just fine then.

. I'd go with the ACT 2100lb clutch kit for the non-turbo tranny. It's not called the 2100 but it's the equivalent.

$300 (Canadian coin from Magnus) for that plus the OEM throw out and some grease. Just do it that way.

I basically had the PCV valve that hooks up to the intake manifold, unhooked it from the valve cover and used it as a vacuum line. That line goes to the BOV, but also t's to the turbo's wastegate. The PCV only allows a certain amount of pressure to go to the wastegate, but allows full vacuum for the BOV.

 

[supergoat]

Originally posted by mavisky


oh quit crying and order up the $180 clutch kit that i did. it'll hold just fine then.

Wanna spot me the money?

Considering my personal life fell apart, directly affecting my job forcing me to lose it, I can't exactly shell out $180 right now.

There's some more whining for ya.