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Re: 3.0 over 2.5
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Posted by Notnoel [Email] (#23) [Profile/Gallery] (more from Notnoel) on Thu, 22 May 2014 13:00:45 Share Post by Email
In Reply to: Re: 3.0 over 2.5, derek900, Thu, 22 May 2014 12:39:10
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Do a search for it on this site.

Basically, you unplug the turbo bybass switch, and read the actual boost (in psi) with a calibrated gauge. Base boost should be about 6 psi. Maximum boost through the APC can be thought of as basically a multiple off that (if your base boost is low, you're never going to hit max). When I set my base boost originally, it was only about 2.5 psi.

Once you know what your base boost is, you let the engine/turbo cool off, remove a small clip from the wastegate actuating rod, and trn the threaded rod until you add or subtract the correct length to get to 6 psi (or 5.8 or whatever it is).

The procedure is in Bentley. If you don't have a Bentley. Buy one.

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