What parts are needed »
The stock AEG pistons compensate for the 8V's 10:1 CR rather nicely but when paired with a 20V head,the CR drops to ~ 8.2:1 which is ideal for FI applications.Because the AEG block has an 82.5mm bore,sourcing stock "1.8T" 81mm pistons would be a waste of time and notching the allready low quality AEG pistons for a #5 valve is asking for trouble.The AEG 20V REQUIRES you to purchase custom pistons from either:
1. JE (through JRC Motorsports)
As you will not find 82.5mm 20V pistons with a low CR.
2. CONNECTING RODS:
Just like the stock AWP 1.8T,the AEG also has weak connecting rods (rated @ 350bhp).Since the AEG 20V is a custom build it is recommended that you upgrade with forged units either from:
* SCAT (most affordable)
3. TIMINT BELT & TENSIONER:
* OEM AWP/AWW 1.8T Timing belt
All Belts should have a Curvilinear II profile
4. HEAD GASKET:
06B 103 383 AF - European head gasket with the 3 oil returns.AEG headgasket does not have the 3 rear oil returns.
5. PARTS NEEDED FROM 1.8T ENGINE:
Because your starting with a non-Turbo engine block,expect to need some stock 1.8T parts.You can always improvise with aftermarket components but having stock available is always a plus.
* oil filter bracket (you can tap the stock AEG bracket for an oil feed)
* coolant Lines & hoses
* Coolant return line for turbocharger - This requires the rear of the AEG block for the coolant return fitting.
* Hyrbid Oil Pan
* Intake manifold
* Exhaust manifold