Re: Can I run stock s/w with GT28RS turbo on T5 CSE ? - Saab Performance Bulletin Board - Saabnet.com
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Re: Can I run stock s/w with GT28RS turbo on T5 CSE ?
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Posted by KKAero [Email] (more from KKAero) on Fri, 12 Jan 2007 14:32:05 Share Post by Email
In Reply to: Can I run stock s/w with GT28RS turbo on T5 CSE ?, Roy, Thu, 11 Jan 2007 17:33:16
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Hi,

The way I see it you have several issues, which actually make me wonder why your indy installed a GT28RS and not a smaller turbo...

1) The significantly increased flow will screw up your A/F ratio quite severely. T5 is able to adapt slightly, but not to the extent that it can compensate for this big a change

2) Your auto tranny definetely doesn't appreciate that high levels of torque. Anything beyonnd 270-280 ft-lbs is starting to push it...

What you need to do is either drive that car very carefully until you get a proper software for the car (which would actually imply a custom tune in your case) or replace the turbo with something more "sensible".

Either way, I would suggest you remove the #5 fuse to disable the APC valve. This will reduce boost to base boost. You will need to check your base boost of course, but I would expect it to be 0,6 bar with the stock GT28RS wastegate.

Best regards,

KK

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