Single Turbo RX-7's Questions about all aspects of single turbo setups.

Got a Greddy Profec Spec II

Old Jul 14, 2003 | 11:51 PM
  #1  
JScott's Avatar
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From: Blue Springs MO
Got a Greddy Profec Spec II

Well, I picked one up off Ebay from a guy named Dennis. ID is Autowurks. $309 shipped so price was good and service was too.

It works really well and has some great features but I've got one complaint. The display and all settings appear to read 2 PSI higher than both my Autometer gage and Haltech. Even with Autometers reputation, I'm pretty confindent that the gage and Haltech are fairly accurate. SO.... Any experts out there know of a way to adjust, maybe by an internal var. resister, the reading to make it accurate? I'm a little gun shy to just tear it open so soon....
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Old Jul 15, 2003 | 01:57 AM
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From: sunshine coast Australia
im thinking off getting one so its good??? was it brand new???
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Old Jul 15, 2003 | 09:45 AM
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From: Blue Springs MO
Originally posted by madaz07
im thinking off getting one so its good??? was it brand new???
Yes, brand new in the box.

Only complaint was that with it reading 2 psi higher, I had set the "overboost" limiter too low. I was originally fighting the unit's own limiter function and boost was bouncing up and down. Now that I've compensated for it reading too high, it works great.
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Old Jul 15, 2003 | 07:49 PM
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From: Buckhead, Atlanta
greddy spec II's have been recalled for a little while, maybe you've found the reason and gotten one of the older ones
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Old Jul 15, 2003 | 09:57 PM
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Have you stopped to consider that you likely have 2psi drop across your IC and pipes? Its very likely, especially considering that the boost controller doesn't know what the pressure is in your TB, only whats at the compressor.
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Old Jul 16, 2003 | 04:51 AM
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From: CA
yea, where are the pressure signals tapped at? may be piping pressure drop...
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