[Vwdiesel] Turbo 1.6 diesel Fox

[mark shepherd]

Hi Brian,I bet you're a little excited to  say the least!
A VW fanatic today asked me if I'd sell my GTD, as he'd seen it parked up 
for months.

What does a Fox weigh compared to a Rabbit, Golf, Jetta, Dasher, or Quantum 
for that matter?

I wonder if reducing that swirl recess will have much effect on it's 
function?

I also have a problem visuallising what benefit reducing the compression 
has, when seeking maximum or near maximum output power, when the power 
output of an engine is surely based upon the force applied to the piston. So 
to achieve say 150BHP you require a certain force acting in the chamber, 
which, surely has to be the same whether running 23:1, or 18:1 isn't it? 
Granted, it is also linked to average pressures.

Surely if it is only peak pressure you are trying to lower, then injecting 
over a longer period, extended burn etc can be achieved with a lower 
breaking pressure on an injector, or am I missing something fundmental in my 
thought processes?

Additionally, I  fail to see why an extra 100 psi, for example at no fuel 
injection, gained from compression lowering, would be anything more than 
100psi at 1200psi, or whatever combustion takes us to; indeed I assume that 
it is less than that due to higher heat transfers.
Some Googling required I think...

James must be up to the task on this one when he's not writing about his 
life in a Cannola field...

Mark


----- Original Message ----- 
From: "Brian and Ruth Decker" <decker at toledotel.com>
To: <vwdiesel at vwfans.com>
Sent: Saturday, February 04, 2012 6:57 AM
Subject: [Vwdiesel] Turbo 1.6 diesel Fox


>                Tomorrow or Sunday we should have the rebuilt 1.6 turbo
> diesel engine running in my 1990 Fox 2 door Wagon. I decided to lower the
> compression some to hopefully let it run cooler and be able to use more
> boost. I had the top of the pistons milled about twenty five thousands. 
> They
> just barely stick out of the top of the block now at TDC. The milling took
> out about half the depth of the swirl pockets in the pistons.
>
>                I will have a report as soon as I get a test run on it.
>
> Brian Decker
>
> Toledo WA
>
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