81.5mm pistons, what cc would this be?

[Dani_B19]

As per title, would 81.5mm pistons give a 1900cc displacement or less?

 

[<tuffty/>]

Stickies dude... big turbo info.. 83mm required for 1900 btw..

<tuffty/>

 

[Dani_B19]

Sorry tufty, i should know better, while your hear, what would 81.5mm be, around 1850cc? Would it esn be worth the hassle?

 

[Andrew@A.L.D]

Engine Displacement Calculator

Don't forget you have a 86mm stroke

Mine is 95.5mm

 

[Andrew@A.L.D]

what would 81.5mm be, around 1850cc?

1795 cc

 

[<tuffty/>]

USING THE STOCK 1.8T BLOCK

With using the stock 86.4mm crank, increasing bore size will give you the following:

81mm bore = 1781cc- stock displacement
81.5mm bore = 1801cc
82mm bore = 1825cc
82.5mm bore = 1847 (small 1.9L)
83mm bore = 1870cc (1.9)
83.5mm bore = 1892cc

With using a 2.0T FSIor 2.0 AEG 92.8mm crank will give you the following:

81mm bore = 1912
81.5mm = 1936
82mm = 1960
82.5mm = 1984
83mm = 2008
83.5mm = 2032

(taken from here... http://www.audi-sport.net/vb/a3-s3-forum-8l-chassis/75685-lots-big-turbo-high-power-info.html, which is in here... http://www.audi-sport.net/vb/a3-s3-...info-stickies-please-read-before-posting.html)

<tuffty/>

 

[Andrew@A.L.D]

Forgot the .4mm on the stroke of the S3 crank

 

[Dani_B19]

So for the extra cost and work its not worth it is it?