I've been researching turbo setups and i've come across some different turbo's/ manifolds; t3/t4. from my understanding a t3 turbo manifold is undivided and uses only ONE wastegate where as the t4 turbo manifold is divided and uses TWO wastegates. Also a t3 turbo is known as a single scroll turbo where as the t4 is a twin scroll turbo if this is incorrect please educate me further on this. if there is anything else different please let me know!

 

That is incorrect. Either can be divided or undivided. T3 is a smaller platform with a smaller entry into the turbine housing and tighter bolt spacing. T4 is a larger flanged turbine housing. T3 and T4 used to correlate with the size of the compressor and turbine wheels, though now many turbos are available with either T3 or T4 housings. In general, the higher the number after the T, the larger the turbo.

Tim

 

Thank you Tim for the info. What about the twin scroll single scroll deal, sorry im new too the turbo world. this will be my first turbo car and im looking for some good legit information about turbo's