16V head-combustion chamber volume?

[drew at scirocco.cs.uoguelph.ca (Drew MacPherson)]

This is very interesting, as what I'm trying to sort out is if it's
possible to build a 1.6 16V by installing a 16V head on a 1.6TD block
(hydraulic, of course.)  Because the diesel combustion chamber is
essentially the inserts plus a little bit of head gasket space, the
pistons actually stick up above the deck by up to 1mm.

If it could be done without shaving the piston tops, then it should be 
possible to build a funky little 16V for dirt cheap.  The under square 
motor would be quite fuel efficient, if not as willing to rev as the 1.8 
version.

Now, the real kicker is do those 4 valves fit into a 76,5mm cylinder top? 
:)  I have this feeling that may be a bit tight.

Drew




On Mon, 20 Oct 2003, Jason wrote:

> Hey Drew,
>          Don't quote me on it, but I seem to remember my 16V pistons coming 
> exactly to the deck at TDC.... thus the only remaining chamber volume would 
> be what's in the head.
> 
> Jason
> 
> 
> 
> At 12:35 PM 10/20/2003, Drew MacPherson wrote:
> 
> >I understand that the 16V head has a greater combustion chamber volume in
> >the cylinder head than the 8V engine (right?) which results in
> >undesireable compression ratios when mixing and macthing 8V and 16V
> >heads/blocks (ie. 8V head on 16V bottom end = high CR & detonation, 16V
> >head on 8V block = undriveably low CR)
> >
> >Does anyone know how much of the chamber volume is in the head on the 16V?
> >How close to the deck do 16V pistons come at TDC?
> >
> >Drew
> >
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> 

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