Quote:
Originally Posted by mct3351
Assuming you're asking sarcasticly (if ur not being sarcastic I could plot you hypothetical dynos in excel comparing the expected output of those two scenaros)...Not any where near the same amonut of peak power which is exactly what I said in the two previous explinations, for reasons which I have also already explained. Did u read it? FYI they'd produce similiar peak torque numbers though. Because for a shot period the t25 could provide adequate mass flow rate to achieve 15 psig manifold pressure. Then, as the revs increase, it would no longer be able to sustain the mass flow rate required the keep the manifold pressurized to 15psig. The torque curve will dive and the hp will flat line.
Are you still disagreeing with my original statement that the stock fuel system on an sr20, as installed on an sr20, can handle any turbo known to man at 7 psig manifold pressure?
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After doing some further reading and rethinking things, I want to offer an apology and say that I agree with you about your explanation.
If I understand you correctly, you are suggesting that a T25 vs a 2871R (for example) are SUFFICIENTLY efficient enough at 7 psi that the difference in output air temperature shouldn't be much......thus, the mass air flow from the two WOULD be the same.
However, at 14 psi and higher RPMs, I believe you suggest that the T25 is basically INEFFICIENT enough relative to the 2871R that it will not flow as much mass (air density goes up).
I believe your explanation was a good one, but I was not thinking clearly (LONG FUCKING DAY, trust me).....
So, hypothetically, the T25 at 15 psi and GT2871R at 15 psi....comparison:
Assume that they both spool by 3500 RPM and fix them at 15 psi (JUST SUPPOSE....).....so then (as an example), they may produce the same mass air flow (and thus torque) up to say 5000 RPM (JUST AN EXAMPLE again), but beyond this point, the T25 starts becoming so inefficient that even though they are still both at 15 psi outlet pressure, the T25 just can't keep pumping air at that pressure and at the same DENSITY as the GT2871R....thus, the T25 torque curve begins dropping off earlier, even though the boost pressure is the same in the 2 cases....
Sound correct now?
So okay, I give in, you are correct :-)
Sorry, again.