t3 turbine to small for twins?
t3 turbine to small for twins? ok so i have been reading in this section for a bit and can't seem to come up with a clear answer just a bunch of opinions and arguements. The question is if i run twins is a t3 turbine going to be too small? ive seen some threads about sponsors and members running twin 35r's with a t3 housings on all different size engines. Is there a formula to calculate turbine A/R size and/or flange style? i have a 370ci with a six speed and im looking at a pair of 60mm t3/t4's with .70 A/R turbine housings.
A .70a/r turbine would still make some serious power with your 370c.i. It really all depends on what kind of power you are shooting for. Just for reference...my little 347c.i. twinturbo t3/t4's with a 62mm compressor wheel/e-cover and .63a/r turbine housing/stage 5 turbine wheel made 900rwhp (dynojet) on 23.5psi, but the turbo's are done, obviously the t3's .63a/r turbine housing is just too small to reach the 1,000rwhp range 
, well...atleast, that's the case in my combo.
, well...atleast, that's the case in my combo. well one of my options is doing twin holset hx40 pro with BEP .70A/R turbine housings, they are supposed to flow like the gt3582r and the dsm guys say they come in 400 rpms earlier on a 2.0l . its a good quality turbo for cheap. id love to have 1000whp but it isnt a near future thing so i guess this might be a good option. thanks
I guess you would have to look at how much air flow one bank of your motor woll flow. 1/2 of your motor is going to be a 3.0L and will use 42lbs / min of air flow. Then with your pressure ratio you can look at the compressor maps and see what you can run. 
are you talking for the compressor or turbine? im just worried about having to much back pressure and choking up the engine. The compressor map calculator i did showed that i would be in the most outer island of the map at 2 bar @ 6500 rpms
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