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First I will write some more things about fuel system that I don't explain in the respective post. Stock fuel pressure regulator is linear type with base pressure of 3 bar (like I mentioned there), which mean that when there is positive pressure in the intake manifold (boost) fuel pressure will be sum from that boost and base pressure (3 bar). So If you run more than 1 bar in the intake manifold, fuel pressure regulator will allow more than 4 bar in the fuel lines. But stock fuel pump is designed to work on max 4 bar , so if the car is setup at considerably more boost (peak and hold) this will load the pump(it will heats up) and at some time it will give up (mainly depends on how often and long fuel pump work at that state). Another things is that if you run on higher than 1 bar boost at high RPM (max power) your injectors will flow even more. The tonight post will be for engine oil. My engine is not new ('96). For these years and kilometers the measurement and gaps in it have changed. I have been using Selenia Racing 10W-60 engine oil. That is recommended for my car for sportier use by Alfa Romeo hmm. The first index is viscosity at low temperatures. And second index is viscosity at 100°C. Oil with "big gap between indexes" are produced with additional additives and over time it's characteristics (indexes) comes closer - they loose their initial characteristics. But these main indexes are not all about one oil and two different brands 10W-40 oils don't have absolutely same characteristics. And with the not so good price of Selenia Racing in Bulgaria and that performance upgrade I decide to go for some more "performance focused" oil. And I stopped at 300V series of Motul. These oils are classic for racing and performance car and can be bought at good prices (better than Selenia Racing). In Bulgaria most popular of them is Le Mans 20W-60, but decide to not go for it, because of its characteristics. I choose that Motul 300V Competition 15W-50. And with that name it fits my project name (Competizione) very well . I have to say again that I don't use the car at all in the winter for about 5 months so characteristics of the oil in very cold days are not important to me. And one more thing. Due to turbocharger is lubricated from engine oil, when new turbocharger is installed the oil have to be changed so that the new turbocharger to begin it's operation with new oil .

@ Alfaduden: That is chinese turbocharger and hence thats very low price. Buying chinese turbo is very risky. Their quality is not very good. It can last long enough or can break after 100-200 km for example (that are real life stories ). And many peoples stay away from them after they bought one two. T25 means that is have T25 style turbine inlet and exhaust manifold to which turbocharger have to be mounted have to end with T25 flange. Stock turbo use T25 turbine inlet, but turbine outlet is different from standard Garrett T25/T28. I think that on GTV is some Mitsubishi variant. I will show some pictures of stock turbo on GTV V6 tb-Garrett TB2538 (picture are taken from one ad in Bulgaria ): and standard Garrett 5 bolt T25/T28 outlet . And the turbo that you show don't have pictures on the other side, but is written "Fits instead OEM SR20DET Garrett turbo." => it use 5 bolt T25/T28 outlet => it can't fit on stock GTV downpipe (shown on the first picture). If you are looking for stock replacement read that topic , if haven't read it yet.

Hi Jotie, nice combination, V6 TB in Spider. In Germany we can´t buy that combination, that was only available for the GTV. So I have to buy Spider and GTV