[urq] 80tq drag racing- Intercooler reevaluation [long]

[JShadzi at aol.com]

Currently I can get about 15 psi in first, about 17 is 2nd,and by 3-5th it is in the 18 range, but if I attempt to accelerate consistently through all the gears I get a max of 16 in 2nd, and by 3 and 4th it is down below 14ps-bigger IC should solve this though.
Javad

In a message dated Wed, 29 Aug 2001 11:41:29 AM Eastern Daylight Time, "Kaklikian, Gary" <Gary.Kaklikian at COMPAQ.com> writes:

> I've never been able to get more then 12-13psi boost in first and second
> gear in my 4000, regardless of how high I set the boost with the boost
> controller,e.g, 18-20psi in 4th & 5th.   I have a large (by Audi standards)
> 944 intercooler and speculated that intercooler fill time/pressure loss
> might be the cause. But then again, it could be simply there is not enough
> load on the engine in the lower gears to drive the turbo.  I'm effectively
> gearing my car much higher by fitting 1.25" taller tires, and am curious to
> see if this has an effect on boost in 1st and 2nd.
> The pros for a large intercooler far outweigh any cons.
> 
> Gary Kaklikian
> '86 4ktq
> '92 S4 
> 
> > ----------
> > From:     JShadzi at aol.com[SMTP:JShadzi at aol.com]
> > Sent:     Wednesday, August 29, 2001 8:47 AM
> > To:   mbenno at yahoo.com; quattro at audifans.com; urq at audifans.com
> > Subject:  Re: [urq] 80tq drag racing- Intercooler reevaluation [long]
> > 
> > Yes, you are right, but with turbocharging (and everything else too),
> > where 
> > you end up from a performace standpoint is about compromise-the goal
> > becomes 
> > getting to a point of equilibrium where different compromises lead to the 
> > final result.  Adding more IC volume will add to the pressure loss, but
> > will 
> > reduce intake air temps,which are currently unacceptable.  
> > Javad
> > 
> > In a message dated 8/29/2001 7:21:26 AM Pacific Daylight Time, 
> > mbenno at yahoo.com writes:
> > 
> > << Don't you need to worry about pressure loss and air speed when adding 
> > volume to the intake track or is it just as simple as adding more
> > capacity. >>
> >