Is the 1.8 16V really 1800 cc or is it a little less?

[brett at ataxxia.com (Brett Van Sprewenburg)]

How about taking a stock 1.7L EN motor and getting .5mm oversize  
pistons?
Using the handly engine displacement utility on Scirocco.org (which  
would
have answered the orginal question by stating 1780.875), we can get a
displacment of 1737cc, which is nicely close to the 1750 max in the  
targeted
class.

86.4mm stroke x (79.5mm stock bore + 0.5mm) 2nd oversize pistons of the
same compression ratio as stock which is 8.2:1.

It is interesting to note that merely increasing the bore size will  
slightly
increase your compression ratio, purely unintentionally though,  
unless it
is compensated for within the shape of  the replacement piston.


==Brett


>>
>>
>> > Ok the rules state you cannot deck the head.. what about the  
>> block and
>> > pistons to keep the compression ratio the same, but decrease the
>> > displacement :-)
>> >
>> >
>> >
>> > On 10/3/06, Cory Langford <Cory_Langford@bcit.ca> wrote:
>> >>
>> >>
>> >>
>> >> Well, the rules also say I can't deck the head or change the  
>> compression
>> >> ratio :(
>> >>
>> >> Guess that leaves the EN 1.7 with a displacement of 1715. I  
>> just hoping
>> >> to
>> >> have a 16V instead. I guess a 90 HP engine in a 1500 lb car is  
>> still
>> >> somewhat competitive. Those Honda hatchbacks seem to dominate  
>> that class.
>> >>
>> >> Cory Langford