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

[Kaklikian, Gary]

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. >>
>