Sorry guys but I have been looking for threads on this but I cant find any thing. Im looking to upgrade my turbo so I wanna know the stock A/R size and go off that? Thanx guys

 

I dont have A/R numbers but I do have flow numbers


Stock 8-------41-42 lb./min
Stock 9-------42-43 lb./min.
BBK Lite---------47 lb./min.
FP Green (Gen 1)------- 47 lb./min.
Tomei ARMS -----------48 lb./min.
BBK Full---------------51 lb./min.
FP 73HTA Green-------54 lb./min.
FP HTA 3076----------57 lb./min.
BBK-B (XL)------------59 lb./min.
FP Red--------------57-60 lb./min.
GT35R --------------65 lb./min.
FP 82HTA Black--------68 lb./min.
GT37R ----------------75 lb./min.

These number should be correct or at least very close.

 

bump

 

is that just a standard 35r flow numbers? how much different is a HTA?

 

bump

 

Hey Rex, 2 bumps in a couple hours is kinda excessive and annoying. Especially when people have been posting, which in turn already bumps the thread.

 

Edit

 

If I am not mistaken, aren't the BBK-Lite and the BBK-Full both configured with the same identical compressor housing and compressor wheel? This being the case, then how could the same compressor be rated at two different rates of flow?

 

9.8 is effectively a .73 A/r Twin scroll (.43 single), a 10.5 is .77 A/r TS. This is only relative to the turbine housing in question and not something like a T3 or T4 necessarily.

 

I dont know exactly. Those are just numbers I have seen posted.

 

sweet data on flow rates.

 

bbk lite and full both at 49lbs/min

might want to edit. it's posted on there website

 

When I posted asking why CBRD publishes two different flow rates for the same compressor wheel, I did not know the reason either. We know that the BBK-Full and the BBK-Lite share the same comp wheel. But the BBK-Full moves more air and ultimately produces more power than the Lite. So where is the difference?

The only significant difference between the two turbos is the turbine wheels. It appears that a compressor's flow rating is directly impacted or limited by the flow rating of the turbine wheel with which it is paired on the opposite end of their common shaft.

By doing a little research I have gained a somewhat sketchy and extremely limited understanding of how a turbine wheel's diameter and the turbine's cross-sectional flow area can affect compressor efficiency and flow:

"To achieve high overall turbocharger efficiency, the co-ordination of compressor and turbine wheel diameters is of vital importance. The position of the operating point on the compressor map determines turbocharger speed. The turbine wheel diameter has to be such that turbine efficiency is maximized in this operating range." (From: The Borg Warner Turbo Systems Corporate Website)