As in the title, would that be even possible on this engine? I believe that are the same engine with a different head?

I am not a mechanic by any stretch of imagination, so if I am missing something glaringly obvious, please just tell me, I'm here to learn

All CBZB are SOHC, so I don't understand your question.

For a moment i've tought of that but there is to much to consider,

first of all you need to find a cylinder head with the same diameter of the celing of the head and the celing of the piston, then a way to bolt the head in the monoblock due the different size of the SHOC and the DHOC, find a way to route the timing chain, ecu and many other thing, at this point put a 2.0L tsi in it, due to the frame rail design it can allow that vag engine.

(my dream is to find a wrecked S1 and make my fabia combi 5J awd)

34 minutes ago, Breezy_Pete said:

All CBZB are SOHC, so I don't understand your question.

31 minutes ago, Jack25 said:

For a moment i've tought of that but there is to much to consider,

first of all you need to find a cylinder head with the same diameter of the celing of the head and the celing of the piston, then a way to bolt the head in the monoblock due the different size of the SHOC and the DHOC, find a way to route the timing chain, ecu and many other thing, at this point put a 2.0L tsi in it, due to the frame rail design it can allow that vag engine.

(my dream is to find a wrecked S1 and make my fabia combi 5J awd)

Jack got it, I was hoping to convert a CBZB EA111 (which is 8v SOHC) to 16v DOHC, potentially with a CJZD EA211 head. This would be along with a host of other modification ideas (Bigger turbo, cams, ect). I really like the idea of a tiny displacement car making way more power than it aught to.

I read something about a built polo with a 1.2 tsi making a ton of power and want to do something similar to my spaceback.

I really understand you, I too would like to have more bhp in my fabia, for now i'm "stuck" around at 140 bhp with a revo stg.1 and 100 octane fuel, if only it was a 1.2 tsi EA211, the turbo could be easly upgraded from a ton of vag cars just plug and play (and a tune), but on the EA111 the turbo is saddly integrated in the exhaust manifold