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Question for people pushing the 14b hard

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Old 05-09-2006 | 10:09 PM
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Jordan Y.'s Avatar
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Originally Posted by Ender.
Are you still using a home-made MBC?

If so, it could be that. If you would like to try my turboxs and see if it makes a difference LMK. It is not even on my car right now, so it would just be a simple matter of swapping them out. It would at least allow you to rule it out.
I've got a Joe P.


Originally Posted by MitsuBucci
There is nothing you can do to keep the boost from falling off. The best thing you can do is crank the boost up, modify the wastegate to stay closed better and tune your car for the peak boost level you will see for a short period of time.
That's about what I expected. What kind of modification of the internal wastegate is possible to improve sealing under high exhaust pressure?
Old 05-10-2006 | 06:12 AM
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Originally Posted by Jordan Y.
I've got a Joe P.




That's about what I expected. What kind of modification of the internal wastegate is possible to improve sealing under high exhaust pressure?
Try this. Disconnect the wastegate arm from the flapper lever. Do you have to pull the arm outward to reconnect or is it even?

If even or you have to push the arm into the actuator to get it back on you're flapper does not have the correct pre-tension and is likely not fully shut while building boost.

Remedy woudl be to "adjust" the arm to give slight pretension, or if not adjustable, add washer(s) to the WG mounting bracket

Taken from t00ners as well.

Last edited by Ender.; 05-10-2006 at 07:37 AM.
Old 05-10-2006 | 07:33 AM
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Just some other thoughts...

Originally Posted by T00ners
Do a test run with the actuator nipple open. This should result in all out boost so feather the throttle to keep it at 17psi. If problem solved, the mbc is in question. If problem persists, go to 3.

3. Perform a intake leak test like everyone suggested, fix all leaks until system is able to hold about 20psi for a reasonable amount of time. If problem persists after this, you probably have a dying turbo running out of steam at higher RPMs.

Good luck.

Last edited by Ender.; 05-10-2006 at 07:47 AM.




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