What size main jets for a 1.4sr with a K&N??

[funkypunk89]

Hey,

If i fit a bolt on K&N to my 1.4sr with a pierberg 2E3 carb what size main jets should i change to in order to get best improvements? if any?

Any info would be great!

:D

[Snowface]

if u wanted a bigger jet u'd have to look at pierburgs of a Cav or astra, maybe a 1600 cav, but then that might be too big!