[Vwdiesel] TD swap black smoke from using NA exhaust?

[TexasTDI]

The N/A exhaust is pretty small.  (Something like 1.75"?)  Turbo's need to
breathe.  I'd definitely invest in a larger exhaust.  Don't know if it'll
solve the smoking issue, but it'll make your turbo happy.

Chris Thornton
2000 VW Golf 1.9TDI 130hp/229ftlbs
1998 VW Passat 1.8T -- FOR SALE
Amsoil Synthetic Lubricants Dealer #1098500
TDI & Diesel Club of Texas => http://texastdi.com/6/ubb.x

----- Original Message -----
From: "Nate Wall" <nwall at opei.org>
To: "Milton Kaplan" <teacher525 at juno.com>
Cc: <vwdiesel at vwfans.com>
Sent: Thursday, October 10, 2002 9:38 AM
Subject: Re: [Vwdiesel] TD swap black smoke from using NA exhaust?


> I had real bad black smoke like that on my Jetta TD. I replaced the
injectors
> and timing belt (it got retimed w/ a dial indicator) and the smoke
> disappeared, so I can't say for sure which it was, but the nozzle holes in
> the old injectors looked worn a little bigger than the new ones!
>
> --Nate
>
> Milton Kaplan wrote:
>
> > I recently had an 86 Jetta TD engine swapped into my Caddy. Runs fine,
> > much faster than the 1.6 NA.  Engine starts fine, no start smoke and
runs
> > very smooth.
> >
> > Basically the NA exhaust was welded back to the downpipe as a matter of
> > convenience.  I plan to get rid of the stock downpipe and exhaust,
opting
> > for a 2 1/4 or 2 1/2 system.
> >
> > Meanwhile I am wondering if the current restrictive exhaust is causing
> > black smoke under load. I get the smoke from about 1/2 throttle under
> > load especially bad in 4th and 5th. Puts out quite a smoke screen. My
> > thought is that the restrictive exhaust is not allowing the turbo to
> > spool up fast enough causing overfuelling. Probably makes sense to
change
> > exhaust before tampering with max fuel screw on pump.