I thought that with breather mods the stock turbos can handle 15psi (maybe a bit more) consistantly and it not reduce there reliability. If you consider keeping the stocks let's look at what options you hav as a 4 bolt upgrade just incase you decide to aim for higher HP in the future. I don't know much about them nor do I understand compressor maps. But I know z1 mods the stock turbo housings for larger wheels. They have 3 different variants and I don't know if any are the same as sport 500's. I'm also not sure if the jwt 4 bolt options/option mods the housing or just changes the wheels. Many seem to say that MASIVES are over kill but what other IC's can be bought with 2.5" inlets/outlets right off the shelf?? And for the price of new stillen/greedy etc it just makes sense to get the MASIVES from the get go.
"torque gets you off the line...& hp gets you over the line." - TTKeeper |