[Vwdiesel] Head job

[LBaird119 at aol.com]

> >What are the benefits or drawbacks of going to a 2 notch. 

  In theory:  Static compression would be lower.  Haven't heard 
of anybody yet that can give 1:1 comparrison so if you DO put in 
a 2 notch.  Get compression readings on a good cylinder before 
pulling the head (oops, too late?) and then after with a 2 notch.
Lower compression could/would make for more difficult starting.  
Although cranking speed could increase due to less pressure and 
might overcome the loss in pressure.
  You may also have higher mileage and power due to lower pumping 
losses.  I've been debating tearing my Rabbit down and cutting a set 
of pistons down for 19:1 just to find out.  A shame since it starts so 
well now but if it proves worthwhile and does make a starting problem, 
there's always ether kits.   Fueling would also be a little higher due to 
the lower pressure diferential between the injector pressure and cylinder 
pressure.

> 
> >This is the one I ran veggie in last summer. Would that have any effect on
> >the gasket?

  I wouldn't expect it to in any way.

> >Sure kept the engine clean.

  If they're running well they do open up surprisingly clean.  We just 
usually don't tear into one until it's not running well and it's all gunky.  
:-P

> 
> >Would slightly reduced compression (thicker gasket) result in greater 
> gasket
> >longevity?

  I'd be inclined to say a straight no.  Peak cylinder pressures, operating 
temperatures, temperature related stress and expansions won't change. 
Those are factors for gasket failure. I  doubt we really overpressure them 
to death.  :-)

> >I'm going to use stretch bolts for re-assembly. Too much trouble to import
> >raceware.
> 
> 
  That's a shame.  I have to say there is one disadvantage to studs.  It 
makes it much harder to remove the head.  In an NA the manifolds are 
in the way if left on and on either, carbon in a bolt hole just makes removal 

nasty hard.  Even with clean holes the head has to come straight up 
and that's not easy.  Of course you can buy the special tool and pull 
the studs after pulling the nuts but then you have the holes to clean 
and chase again as well as reinstalling the studs.
     Loren