16v head on a 1.7L engine

[jdbubb@ix.netcom.com (Dan Bubb)]

OK! I couldn't help it. I did the math. I made some assumptions:
1. 16V combustion chamber is all in the head, which is substantially
true.
2. 8V combustion chamber is 36CC (volume of the chamber in the head
only), which is a number I remember from somewhere.
I come up with 7.3:1 CR for a 16V head on a 1.7 L 8V block. Plus, I bet
you'd have to clearance the pistons for the intake valves and maybe even
clearance the block a little bit for the intakes since the bore is only
79.5mm instead of 81mm.
blah, blah, blah.....
Dan


"Scott F. Williams" wrote:
> 
> Mr. Reiger wrote:
> >     Yea, but enough to drop THAT low???
> > Al
> 
> Sure, the 8v head/16v bottom end combo yields about a 14:1 CR. This is 4:1
> higher than a 1.8l 16v, for instance. Plopping the 16v head on a 1.7l motor
> will have the reverse effect. You do the math. :^)
> --
> Scott F. Williams
> NJ Scirocco nut
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