Hi guys just a bit of advice , I have a set of 40mm Webbers for my 2Lt but I can get a set of 45s would I benefit in any from 40 to 45s I know thye will need re-jetting
Cheers
To give you a quick insight on comparison between 40 and 45 DCOE's, check out the following video released by Weber. From my perspective the 40 DCOE would be the most suitable for a 4 cylinder engine, as it can be jetted and choked to suit the majority of road and race prepared engines.
https://www.youtube.com/watch?v=O82DUq2PHkw
as sportiva has said how far do you want to go
is it for road use or track use ?
I suspect its a 1750 giulia??
if so just rejet the 40mm for road use