Re: "Blue" wastegate spring

[Sachelle Babbar <sbabbar@iris.nyit.edu>]

I shimmed my stock spring to 1.7 bar (under cold, high load
conditions).Factory is 1.5 bar.

**************************************************************************************************************************************************							       
*Steve                                       Sachelle Babbar
*'84  5ksT 1.6-2.0 bar                    <SBABBAR@IRIS.NYIT.EDU>
*Cockpit adjustable wastegate, AudiSport badge
*
*Disclaimer:"Any information contained herein is based purely on my own
*personal experience and may not necessarily reflect yours. Use caution as
*your results may vary from mine."
********************************************************************************

On Mon, 23 Feb 1998, Phil Payne wrote:

> In message <Pine.SOL.3.96.980223103858.18174B-100000@iris.nyit.edu> Sachelle Babbar writes:
> 
> > Mine is a factory blue spring. I guess on my car (a kh) it could mean
> > stock @1.5 bar.It's got a dap of blue paint on it's bottom (or top). I
> > don't know if that's the answer your looking for.
> 
> Shouldn't your 'stock' be 1.6 bar?
> 
> The parts fiche doesn't go to component level.  The part number for the
> ur-quattro wastegate is always 034 145 705, with a suffix:
> 
>    A  - MB
>    T  - WR
>    AA - WX
> 
> I would expect the MB to have a weaker wastegate spring than the WR.
> Firstly because boost is lower (1.6 vs 1.7 bar) and secondly because
> the ECU can 'help out' by dropping some boost on top of the diaphragm.
> 
> Likewise, I would expect a MAC11 MC engine to have a weaker spring
> than prior turbo engines.  Any confirmation?
> 
> --
>  Phil Payne
>  phil@isham-research.demon.co.uk
>  Phone: +44 385302803  Fax: +44 1536723021
>  During Demon problems - copy critical mail to 100012.1660@compuserve.com
>