Question about the different FAVs

[Hope_Ender]

Hi i have a HFS-3 earlier in the year i had water ingress and needed to replace the FAV.

I replaced it with 1300cc 806 - 239B instead of the replacement 806 - 556.(didn't look far down the page enough )

Should there be any difference? What is the standard FAV? 1300 or 1600

Reason i ask is, when the old FAV was working the car never over boosted but with the new one it over boosts on WOT.

Many thanks Richard in advance
Steve