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 if I could ask them some questions to sort some teething issues I am currently experiencing myself.