Timing being pulled back? With links to the graphs

Claus Vegener vegener at post7.tele.dk
Tue Dec 3 22:51:06 EST 2002


Yes Patrick
That's my very own experience.
Changing from k24 to G T04/50 and adjusting fuel pressure
watching my O2 readout - all other unchanged.
0-60 Mph from G-TechPro changed from 5.52 sec. to 4.96.
The WG springloaded and not changed.

I have a problem with the IA st. 4 running into over boost cutting my
fuel supply. My chips didn't not have the falling slope as it should
from  24 (2.6 Bar abs) to 18.
It stays stable until cut off at 6.000 rpm.
I have placed a dyno run together with
a) original 220 (226 - my case) Hp and IA III with the
timing retard before reaching 277 Hp
b) Hp and Nm curves
c) The flat boost not dropping but giving a serious  acceleration
until cut-off
New pages are
http://home7.inet.tele.dk/vegener/audi

The k24 is too restrictive at the turbine.
Have a very fast spool up due to a small A/R ratio which is easy
to feel if the WGFV is disconnected and the WG springloaded.
A bigger turbo have normally a better effective at load and then less temperature rise above the physical determined..
Claus

----- Original Message -----
From: "Patrick Anderson" <ptanders at attbi.com>
To: "Claus Vegener" <vegener at post7.tele.dk>
Sent: Tuesday, December 03, 2002 9:23 PM
Subject: Re: Timing being pulled back? With links to the graphs


> Claus, quick question.
>
> So a bigger turbo boosting to the same psi as a smaller turbo will result in
> more HP and Torque? Is this because the larger turbo is flowing more air at
> any given psi than a smaller turbo? Or is it all heat related and you only
> see a difference in power between the two after heat makes the smaller turbo
> less efficient. I have an RS2 turbo, RS2 Exhaust Manifold, and IA 3+ chip.
> Just wondering if I am getting more power by having the RS2 turbo with this
> setup as opposed to the stock K24.
>
> By the way, I believe you have the IA stage 4 chip. The 3+ gives 22psi and
> backs off to 18psi above 5000rpm. The stage 4 is supposed to give 24psi at
> its maximum.
>
> Patrick
> ----- Original Message -----
> From: "Claus Vegener" <vegener at post7.tele.dk>
> To: "Brian Link" <BrianL at starsys.com>
> Cc: "audifan20v" <200q20v at audifans.com>
> Sent: Tuesday, December 03, 2002 9:14 AM
> Subject: Re: Timing being pulled back? With links to the graphs
>
>
> > Cold and rain some degrees above / some below freezing point.
> > Next week we drive to south Spain for 3 months bringing
> > horses and computers - to do our jobs at distance and expect to
> > return at spring.
> > The dyno was taken 2 years ago indoor but at a humid and warm
> > day in June (28 deg. C)
> > 4. gear; IA stage III - IV ? 2.5 Bar sensor and chips but else
> > quite standard.
> > The test centre NAAK is one of the best in Denmark. The
> > 4-wheel equipment are taken to the Danish DTChampionships
> > for controlling the Hp/weight ratio for a whole season for the
> > racers. So he have a very good and broad knowledge of what is going on.
> > He was impressed, that the tuner (Ned Ritchie) had did his job so well,
> that the engine only loose a few Hp. He sees many cars
> > loosing 100 Hp and they have to completely shut them down to cool.
> > The other / lower curves are the original standard curves taken
> > a month before I installed the IA.
> >
> > Your test show - to my opinion heat/boost surge.
> > I have run with my WG spring-loaded and 300 Hp without
> > electronic WGFV and the boost on a kkk24 decrease from
> > 24 psi to 20 in the same manner as if it was programmed.
> >
> > Re-mounting my Garrett T04/50 without changing WG spring setting gave a
> boost of 21 psi and lot more power (350 Hp).
> > Smaller turbos get hot - and then the IC is too small.
> > (RS2 injectors, MAF and IA stage V chips and adjustable. fuelpressure)
> >
> > Water injection? - NO. Only with 5 boost-map programmed
> > injectors. (According to NAAK) I thought I could save myselves a bigger IC
> and installed Aquamist 8 Bar system - but no change.
> > Kind regards
> > Claus
> > ----- Original Message -----
> > From: "Brian Link" <BrianL at starsys.com>
> > To: "Claus Vegener" <vegener at post7.tele.dk>
> > Sent: Tuesday, December 03, 2002 5:01 PM
> > Subject: RE: Timing being pulled back? With links to the graphs
> >
> >
> > Wow, yours is more dramatic than mine.  So maybe it is not timing, maybe
> > it is boost or heat.  When you did the dyno pull, what gear did you do
> > it in?  Was it obvious what was happening?
> >
> > How is Denmark?
> >
> > Brian
> >
> > -----Original Message-----
> > From: Claus Vegener [mailto:vegener at post7.tele.dk]
> > Sent: Tuesday, December 03, 2002 3:14 AM
> > To: Brian Link; 200q20v at audifans.com
> > Subject: Re: Timing being pulled back? With links to the graphs
> >
> >
> > I have a timing retard from a dyno run
> > on a very hot day here:
> >
> > http://home7.inet.tele.dk/vegener/webcam
> >
> > Claus Vegener
> > ----- Original Message -----
> > From: "Brian Link" <BrianL at starsys.com>
> > To: <200q20v at audifans.com>
> > Sent: Monday, December 02, 2002 7:40 PM
> > Subject: Timing being pulled back? With links to the graphs
> >
> >
> > >
> > >
> > > Gang,
> > >
> > > What is a good way to check to see if my timing is getting pulled back
> >
> > > during boost?  Also what boost levels are others making on pump gas?
> > >
> > > I'm using the street dyno software which shows my car making lots of
> > > power in second gear.  In third gear, where I hold the most boost the
> > > longest (~22 psi which drops down to 18 psi at redline), I can see in
> > > the hp/torque graph a dip where I think the computer is pulling back
> > > timing.  Is there a easy way to data log timing?  Does the VAG-COM
> > > software do this?
> > >
> > > Here is my 2nd gear run:  Looks good, making lots of power...
> > > http://www.geocities.com/brian_link2002/2nd_gear.jpg
> > >
> > > Here is my third gear run...at about 3800 rpm my torque in green takes
> > a
> > > dip that I don't see in the second gear run.   I think it is timing,
> > > because this is max boost.  I will try adding a few gallons of racing
> > > fuel and re-test to see if it changes.  Thoughts?
> > > http://www.geocities.com/brian_link2002/3rd_gear.jpg
> > >
> > >
> > > Thanks
> > > Brian
> > > _______________________________________________
> > > 200q20v mailing list
> > > 200q20v at audifans.com http://www.audifans.com/mailman/listinfo/200q20v
> >
> >
> > _______________________________________________
> > 200q20v mailing list
> > 200q20v at audifans.com
> > http://www.audifans.com/mailman/listinfo/200q20v
>




More information about the 200q20v mailing list