[BiturboS4] no siren
michael at isuzu-mods.com
Tue Nov 12 06:14:23 EST 2002
there are 2 reasons you need a load to make boost. first, the turbos take
time to spool up and free revving the engine is just too quick to make
boost. also, the engine does not generate much exhaust pressure without a
load. retarding the ignition timing causes still burning fuel to shoot
through the turbines which spins them up. of course the motor will have a
huge simulated load on it when the timing is retarded that much because it
will take several seconds to rev up under full throttle.
----- Original Message -----
From: "David" <goodson at menta.net>
To: "Michael Kuriger" <michael at isuzu-mods.com>; "Bill Neilsen"
<wneils at hotmail.com>
Cc: <biturbos4 at audifans.com>
Sent: Tuesday, November 12, 2002 12:55 AM
Subject: RE: [BiturboS4] no siren
> Really ? I don't understand that. Could someone with a boost gauge confirm
> that "there is no boost without load" ?. I thought there was, because in
> workshop when they check boost pressure, they don't use any rolling-road.
> 1999 S4 Avant ABT - Barcelona, Spain.
> -----Mensaje original-----
> De: biturbos4-admin at audifans.com [mailto:biturbos4-admin at audifans.com]En
> nombre de Michael Kuriger
> Enviado el: Tuesday, November 12, 2002 2:48 AM
> Para: Bill Neilsen
> CC: biturbos4 at audifans.com
> Asunto: Re: [BiturboS4] no siren
> unless you severely retard your timing, there is no boost without load.
> you can get a boost enhance device thet will retard your timing 20
> degrees (when the clutch is in) but its really bad for the turbos
> Bill Neilsen wrote:
> > I'm sure someone has already coverd this but I have to ask.
> > Does the turbo have to have a load before they spool up? I notice when I
> > push in the clutch while driving and rev the motor there is no siren and
> > when I re-engage the siren returns at the same rev range.
> > Thanks, Bill
> > 2001 Nogar
> > ABT
> > Stoptech
> > etc.
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