# [s-cars] 5" gone missing

steve powers steve at thepowers.net
Mon Nov 3 21:24:45 EST 2003

```5 psi - yes.

>  -----Original Message-----
>  From: Philip Mische [mailto:pmische at comcast.net]
>  Sent: Friday, October 31, 2003 8:55 AM
>  To: steve powers; '* S List'
>  Subject: Re: [s-cars] 5" gone missing
>
>
>  I assume you mean 5 psi.  Let's keep our units straight
>  here.  If you're going to talk inches you have to specify
>  water or mercury...or whatever. For the record:
>
>  1 atmosphere = 14.7 psi = 1.01325 Bar  101,325 Pa = 29.92
>  inches of mercury = 760 mm of mercury = 33.91 ft of water =
>  10.34 m of water = zero on the typical boost gauge at sea
>  level.  To be correct when measuring pressure you should add
>  'a' for absolute pressure or 'g' for gauge pressure, eg. if
>  you're running 25 pounds of boost that's 25 psig or 39.7
>  psia.  Pressure differences of course are just in whatever
>  units you're in.
>
>  Thanks.  I just had to.
>
>  P
>
>  ----- Original Message -----
>  From: "steve powers" <steve at thepowers.net>
>  To: "'* S List'" <s-car-list at audifans.com>
>  Sent: Thursday, October 30, 2003 11:50 PM
>  Subject: [s-cars] 5" gone missing
>
>
>  > We've been trying to track down the last 5" of boost in my car.
>  >
>  > It's a 95.5 with:
>  >
>  >   - new K26/27 2B turbo
>  >   - RS2 injectors, MAF, FPR
>  >   - IA RS2-style exhaust manifold
>  >   - 7A exhaust cam
>  >   - new Samco hoses, constant torque clamps throughout
>  >   - new Forge BPV
>  >   - new WGFV
>  >   - new POS
>  >   - new vacuum/boost hoses in engine compartment and footwell
>  >   - new clamps for above
>  >   - IA Stage IV w/ 3 Bar sensor
>  >   - Stromung exhaust
>  >   - older metal x-over pipe
>  >   - older metal capped IC
>  >
>  > I'm making 21" of boost while another identical car (w/o
>  Stromung is
>  > making 26" of boost. I've even borrowed the ECU from that car, but
>  > still can only make 21" with my car. Both cars have
>  Autometer gauges:
>  > mine's digital with peak hold and his is analog.
>  >
>  > We haven't verified the gauges one to the other, but
>  that's the last
>  > thing I know of to check (or use a 3rd known gauge on both cars).
>  >
>  > Anything obvious that we may have overlooked? We've
>  pressure tested
>  > the system, but no leaks shown. It pulls hard to redline -
>  I can LFB
>  > all I want with the accelerator on the floor, but still
>  only see 21".
>  >
>  > Thanks!
>  >
>  > Steve Powers
>  >
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>

```