Well were to start....... after replacing my engine and going out of my way to find a super low milage MK1 GT engine (thicker rods) I decide I wated to go down the TD04 route. Well all going well I'm collecting parts........ Mani, decat, turbo, oil and water lines gaskest, I've even bought some Stainless mig wire and argon gas so I can brace everything to the max. So I'm now at the point where I can start bolting it on. Well my engine started to have a slight misfire on idle so I thought plugs...... changed still there..... leads arent that old so I left them ad compression tested all the cylinders Pot 1. 10bar Pot 2. 6bar Pot 3. 10bar Pot 4. 10bar Can anyone spot where the fail is?!?!? well my first tought was gummed/carboned rings so I poored some WD down the pot and left for 1hour sucked it all out put it together ran it till the the exhaust gasses went clear and it had warmed back up and compession tested it again. Pot 1. 10bar Pot 2. 8bar Pot 3. 10bar Pot 4. 10bar I though yeh sorted well kind of its anyway and tht slight missfire had gone woop! anyway 3days later Its taking 20-30seconds of cranking for it to start when cold my exhaust note changed and I lost power on low revs and its not boosting till 3.5k oooopppppps! so pulled the dipstick while it was running and backpressure and smoke. so tomorrow I'm going to comp test again to see what I've got and if its rings I'm going to drop some forged pistons in it and port/polish my head. I dont need to do the rods because there the thicker ones and I'm not going to be putting silly boost through it and I just want some peice of mind by elliminating the weak point which seems to be ring lands. anyway now I've told you all that I'm going getting some prices. EDIT: oh yeh I broke my 6speed box again so I binned it and put 5speed in it