Aurora 5000 Turbo

[GWoody]

I talked to ATS and the MST will not be available for at least a couple of months.

 

[Matt400]

Odd, I would'a thought they would mention something like that when I called.

 

[GWoody]

Odd, I would'a thought they would mention something like that when I called.

You woulda thought, but I think these larger performance places hire just about anybody that can talk on a phone and work cheap, might get a different story next time someone calls about it.

 

[Matt400]

A while back GO 4LO had posted this chart based on his research:

Turbo______CFM______Racing HP____Daily HP

HX35______600________420_________330

HX40______800________560_________440

T66_______800________560 _________440

B1________900________630_________495

H2E_______1000_______700_________550

HX50______1000_______700_________550

HX55______1050_______735_________578

HT3B______1100_______770_________605

T76_______1350_______945 _________743

HT60______1400_______980_________770

B2________1500_______1050________825

HX60______1550_______1085________853

T88_____1450-1750__1015-1225____798-963

HT4B______1800_______1260________990

Big Brother_1900_______1330________1045

T91_______2000_______1400________1100

HC5A/HX82_2450_______1715________1348

T100______2600_______1820________1430

T105______2900_______2030________1595

The folks at ATS claimed their MST flows 1200 to 1300 CFM, in looking at the chart above can that even be right?



edit. . I just got off the phone again and they wouldn't confirm that CFM because the charger is still in testing so the first fella was guessing.

The 5000 flows over 2500

Still going to be 3-4 months on the MST but may be worth the wait.

 

[Luke Warmwater]

So the 5000 flows more than the Big Brother? Flows more than a B2? Flows more than a HX60. On top of that it spools great! Also supports over 1000hp for your daily driver. Does anyone apply that lost art of critical thinking anymore? Makes me think of PT Barnum lmao.

 

[Matt400]

I don't get that either and just wanted to post what the salesman said. All this research makes me just want to leave it stock. . sometimes

They all say theirs is better, flows more, spools better than the next yet consumers end up being the trial and error test bed at their own expense.

 

[AK RAM]

..... salesman... ...

and there you have it... . :-laf

 

[DLeno]

Been following this with some interest and glad to see the conversation recognizes how meaningless these numbers are. CFM numbers mean absolutely nothing because they tell us absolutely nothing about the turbocharger's performance on the engine. They are like the oil pressure gauge in your instrument panel -- something nice to look at that has no correlation with actual behavior. (really, I'm not making this up. read up on the oil pressure guage some time).



First of all we don't care about volume of air per unit time (CFM) because we know that just heating the air up will increase its volume. We care about the massof air per unit time (lbs/min or kg/min). And even that number, by itself, tells us nothing without knowing what pressure ratio the 'charger is delivering that air.



So at the very minimum, to compare turbochargers, you want a graph of pressure ratio versus flow in pounds of air per minute or some equivalent unit like kg/min.



But even if we had such a graph describing some nice high pressure ratio and large flow rate, we would still have no clue how the 'charger behaves at more than one operating ponit. Since we have a drivable vehicle that doesn't just sit there delivering a single horsepower level, we want the charger to run at more than one pressure ratio.



So to be meaningful, the graph needs to contain a "family of curves" for several different impeller rpms. that way you know if a certain pressure ratio and flow is acheivable without things blowing apart or surging real bad.



AND if we had all THAT information, which not many mfgs publish, we would still have no idea how the thing drives, what exhaust housing size works well, What fueling curves the 'charger works well with and all of that!