[Vwdiesel] Fw: Re: 1.6 liter diesel pump

[decker at toledotel.com]

Hi Matt;
    Again Giles performance pump rebuilds might be the best thing since
sliced bread. I personally have a very hard time believing he has found
something new that is not common knowledge to pump rebuilders who have been
rebuilding Bosch .pumps since before most of us were born. I do know that
turning up the fuel screw will supply more fuel throughout the rev range. I
built a 1.6 diesel turbo engine for a Rabbit pickup. I first used an
aftermarket BAE turbo. I think because of the design of their exhaust
manifold and intake manifold that exhaust gas temperatures were dangerously
high. I was running a good Ispro pyrometer pre turbo. I tried every setting
up and down on the pump trying to keep the heat in check and couldn't, I
finally changed over to a VW Jetta turbo system and it ran fine like it
should. Since I had spent weeks fiddling with the pump etc. I was into
adjusting anything. One day I decided that the 850+ RPM idle speed specified
in my Bentley was higher than I wanted so I turned the Idle down. Low and
behold the rig then had almost no power. It would start and run but barely.
Instead of turning the idle back up I turned in the fuel screw and it ran
fine throughout the whole power range.  I later went back to the correct
Idle adjustment and backed off on the fuel screw. I know that turning the
idle screw up or down affects fuel delivery at all speeds and I know that
the fuel screw does also.
    If you need a pump rebuilt go to Giles It's only a few hundred bucks
more than you would spend at home and over the life of the car it won't mean
much.  All I am saying is it is hard for me to belive Giles is smarter than
all the other pump rebuilders over the years. Also for me he lives almost
3000 miles away and in another country which makes it hard to deal with a
problem if one arises.
Brian Decker
----- Original Message ----- 
From: "Matt" <matt_lisa at sprynet.com>
To: <decker at toledotel.com>
Cc: <vwdiesel at vwfans.com>
Sent: Tuesday, January 26, 2010 5:27 PM
Subject: Re: [Vwdiesel] Fw: Re: 1.6 liter diesel pump


> He actually allows the pump to supply more fuel throuout the rev
> range.  The stock injection pump tends to not be able to keep up.
> This is where the extra power comes from.  From what I've heard, his
> mods make a gigantic difference in performance, much more than simply
> turning up the fuel screw.
>
> -Matt
>
>
> On Jan 26, 2010, at 8:12 PM, <decker at toledotel.com> wrote:
>
> > Hi Folks;
> >    Here is my take on the Giles performance bosch diesel injection
> > pump
> > rebuild. I find it very hard to belive that he could come up with
> > anything
> > new after all these years. The whole trucking industry lived by their
> > injection pumps and pretty much the only thing you could do to make
> > a pump
> > perform better was to turn up the max fuel screw. It is a simple
> > adjustment
> > that anyone can do. The limiting factor to the increase in power is
> > how much
> > black smoke you can stand when you put your foot in the pump. Before
> > the
> > days of computer run diesels here in the northwest you would see the
> > boys
> > blowing huge amounts of black smoke out of the stacks when they
> > shifted on
> > the hills.
> >    In this post below by Brian Hoeft. He says he has a Giles pump
> > which
> > gives lots of power and makes enough smoke to blind the car behind
> > him if he
> > wants. So I assume from that the Giles performance pump is a good
> > rebuild
> > with the max fuel screw set beyond Bosch spec.'s. I always set the
> > max fuel
> > screw on my pumps after I have the idle and timing set to spec.'s. I
> > like to
> > se a little smoke when I put my foot in the pump but not enough that
> > the
> > smoke cops want to stop me or the SUV behind me wants to pull out
> > his 45 and
> > put a few ventilation holes in my Rabbit pickup.
> >    I  may well be wrong but I belive you can go to a good local pump
> > rebuilder and get the same performance by after you have it
> > installed on
> > your 1.6, have all in time and tune then you put about an eighth of
> > a turn
> > in on the max fuel screw. Magically you will have a performance
> > pump. It's
> > all a matter of how much smoke you can endure. For a real performance
> > booster open up the exhaust. there is no downside to that.
> > Brian Decker
> > Toledo WA
> > ----- Original Message -----