A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

a few BT issues

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Old Sep 12, 2005 | 05:45 PM
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Default a few BT issues

i fixed my boost leaks today and was finally able to do wide open pulls.
a few things i noticed though:
1.im running off the wastegate but only see 12psi, atp said it was set at 14.7, why a little lower?
2.sometimes at like 5800rpm ill experience a boost cut, my n75 (f valve) is unplugged, how could the computer be backing off the boost (car is DBC). is this my dv opening up (its a 710n)
3. the car at first didnt seem a whole lot faster, but it hasnt seen boost for 2 weeks, could i have a memory (upsolute v2 afr's ar around 11.5-12). after driving for a while it seemed to pick up faster esp. in first.

should i plug my n75 back up or at least play around with the mbc? i unplugged it in the first place because i would see 17psi but got scared since i know that 18psi is the limit of the stock fuel pump.
any suggestions??

setup is: 3inch maf, 440cc injectors, 40psi fuel pressure, 710n DV, gt28rs, atp manifold and 3inch DP, upsolute BT v2 car is a 98aeb
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Old Sep 13, 2005 | 05:03 PM
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Default Re: a few BT issues

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