Running without a mbc

[Kracka]

15 psi on the stock T25 does not equal 15 psi on a 50-trim....applause to Tom for taking the safe route and only running 7 psi for now.

[tpunx99GSX]

Speaking of this subject... I just want to get this clearified....
Ok if i see 15 psi on a t28 and 15 psi on a 50 trim, they are the same pound per square inch but but yet the 50 trim is somehow more boost? Well i know that the 50 trim has to work less to make that kind of boost pressure therefore causing the air to be cooler, but that doesnt change the simple fact that a pound is a pound no matter what temperature it is. So my question is, where do we see the difference? why get a bigger turbo? if you say this turbo flows better, but if its set for the same psi then it really doesnt matter about flow because theres the same wieght int he cylinders.
I pretty much know i sound like an idiot right now but can someone please explain a little, its one of those questions that no one dares to ask due to people making them feel like a total Noob.

[Kracka]

The 50-trim's air is more dense, hence more air volume per PSI.

[tpunx99GSX]

short and simple, i like it.
or in the words of the mighty S2Kracka (Formally known as TalonTSIdude) "Perfect"

[Shane@DBPerformance]

Bigger turbos have bigger exhaust wheels/exhaust housings also, so there is more made there also.

[Super Bleeder!!]

and the bigger exhaust housings reduce backpressure, which lets the cylinders evacuate more of the spent charge, which makes more room for a fresh air (and power), blah blah blah

[SlowTsi]

15 psi on the stock T25 does not equal 15 psi on a 50-trim....applause to Tom for taking the safe route and only running 7 psi for now.Sure it is. Its just the 50 trim has a slightly better flowing hotside to open VE up a little, hence a little more air flowing through the motor. If the hotsides were the same he would see no change except for temp changes. As long as he stays in the 30lb/min range he should be fine on stock injectors. 15 psi will be fine unless its arse cold outside.

[SlowTsi]

Speaking of this subject... I just want to get this clearified....
Ok if i see 15 psi on a t28 and 15 psi on a 50 trim, they are the same pound per square inch but but yet the 50 trim is somehow more boost? Well i know that the 50 trim has to work less to make that kind of boost pressure therefore causing the air to be cooler, but that doesnt change the simple fact that a pound is a pound no matter what temperature it is. So my question is, where do we see the difference? why get a bigger turbo? if you say this turbo flows better, but if its set for the same psi then it really doesnt matter about flow because theres the same wieght int he cylinders.
I pretty much know i sound like an idiot right now but can someone please explain a little, its one of those questions that no one dares to ask due to people making them feel like a total Noob.http://www.dsmtuners.com/forums/showthread.php?t=199534

Surprisingly a little good info from tooners. That nanokpsi guy is a genious!!1!