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Hello First time posting here, Ive been told that the AUB cylinder head can be used to build the popular AFH/AVY hybrid, I understand the cams and pulleys are different, I have built the engine and tried to turn it over, my lupo sport originally had an AUB unit but the engine seized so I used the head to build my hybrid which is AUB/AVY as I was told it would run with a map. The engine turns over but struggles on the compression stroke, as if the starter is weak but I checked it and it is fine. I am wondering if anyone has built a hybrid either using the AUB or AFK successfully and i