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Stock boost is?

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Old 07-12-2007, 01:32 PM
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Default Stock boost is?
What is stock boost on the B5 S4? PSI wise
 
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Old 07-12-2007, 01:40 PM
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Default RE: Stock boost is?
Mine is around 12.2 psi stock.
 
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Old 07-12-2007, 06:06 PM
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Default RE: Stock boost is?
What is the maximum boost these motors can run with stock fuel?
 
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Old 07-12-2007, 08:35 PM
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Default RE: Stock boost is?
Stock is 10psi.

With the K03's it's not fuel but the turbo's that give up. You don't really get any more CFM pushing them at much over 19psi.
 
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Old 07-13-2007, 02:32 AM
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Default RE: Stock boost is?
the apr 93 octane chip runs 14.5 psi and the giac chip runs 17 psi, correct?
 
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Old 07-13-2007, 07:16 AM
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Default RE: Stock boost is?
Side question? How many wastgates are on these cars? Is it just one for each turbo? Or is there a third that is making sure there is not too much boost coming from the two combined turbos?
 
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Old 07-13-2007, 12:30 PM
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Default RE: Stock boost is?
There is 2 wastegates, one for each turbo
 
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Old 07-13-2007, 03:07 PM
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Default RE: Stock boost is?
So if stock psi is 10 then each one is set at? 5? Is there anyway to change this on the wastegate without a boost controler?
 
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Old 07-13-2007, 10:28 PM
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Default RE: Stock boost is?
ORIGINAL: SilverAudiS4
So if stock psi is 10 then each one is set at? 5? Is there anyway to change this on the wastegate without a boost controler?
It doesn't add up, they both put out the same PSI. The reason for 2 is to increase CFM.

No matter what you do, the N75 will cut the boost to what the ECU request.
 
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Old 07-14-2007, 01:16 AM
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Default RE: Stock boost is?
oh okay, that makes sense, i figured it just added up from both turbos. is there anyway to trick the car to add more boost? or would that require a fuel controler as well...?
 
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