So, went on and did a bit further research on the 18g vs 60-1 comp wheel and I found this on aussie wrx forum:
Turbo Flow Rates @ 14.7 PSI
Stock Turbo 360 CFM at 14.7 PSI
IHI VF 25 370 CFM at 14.7 PSI <--- estimated
IHI VF 26 390 CFM at 14.7 PSI <--- estimated
T3 60 trim 400 CFM at 14.7 PSI
IHI VF 27 400 CFM at 14.7 PSI <--- estimated
IHI VF 24/28/29 410 CFM at 14.7 PSI <--- estimated
========= 422 CFM max flow for a 2 Liter at .85 VE pressure ratio 2.0 (14.7 PSI) 7000 RPM =======
IHI VF 23 423 CFM at 14.7 PSI
FP STOCK HYBRID 430 CFM at 14.7 PSI <--- derived from HP potential listed on web
IHI VF-30 435 CFM at 14.7 PSI <--- estimated
SR 30 435 CFM at 14.7 PSI
IHI VF-22 440 CFM at 14.7 PSI <--- refigured
T04E 40 trim 460 CFM at 14.7 PSI
========= 464 CFM max flow for a 2.2 Liter at .85 VE pressure ratio 2.0 (14.7 PSI) 7000 rpm =======
PE1818 490 CFM at 14.7 PSI <--- estimated from max flow numbers
Small 16G 505 CFM at 14.7 PSI
ION Spec (stg 0) 525 CFM at 14.7 PSI <--- per vendor post 12-27-2002
========= 526 CFM max flow for a 2.5 Liter at .85 VE pressure ratio 2.0 (14.7 PSI) 7000 RPM =======
Large 16G 550 CFM at 14.7 PSI
SR 40 595 CFM at 14.7 PSI
18G 600 CFM at 14.7 PSI
PE 1820 630 CFM at 14.7 PSI <--- estimated from max flow numbers
20G 650 CFM at 14.7 PSI
SR 50 710 CFM at 14.7 PSI
GT-30 725 CFM at 14.7 PSI
60-1 725 CFM at 14.7 PSI
GT-35R 820 CFM at 14.7 PSI
T72 920 CFM at 14.7 PSI <--- Note you would have to spin a 2.0 L
engine at about 14,000 rpm to flow this much air.
Turbo Flow Rates @ 18-22 PSI
IHI VF 25 395 CFM at 18 PSI <--- estimated
IHI VF 26 400 CFM at 18 PSI <--- estimated
T3 60 trim 410 CFM at 20 PSI
IHI VF 27 420 CFM at 18 PSI <--- estimated
IHI VF 24/28/29 425 CFM at 18 PSI <--- estimated
IHI VF 23 430 CFM at 18 PSI <--- estimated
IHI VF-30 460 CFM at 18.0 PSI <--- estimate based on trap speeds of cars running this turbo
AVO 320HP 465 CFM at 17.5 PSI
T04E 40 trim 465 CFM at 22 PSI
FP STOCK HYBRID 490 CFM at 18.0 PSI
IHI VF-22 490 CFM at 18.0 PSI <--- refigured
SR 30 490 CFM at 22 PSI
Small 16G 490 CFM at 22 PSI
ION Spec (stg 0) 500 CFM at 19 PSI <--- per vendor post 12-27-2002
PE1818 515 CFM at 22 PSI <--- estimated from manufactures rated max power
Large 16G 520 CFM at 22 PSI <--- upgraded flow some on review of compressor map
========= 526 CFM max flow for a 2 Liter at .85 VE pressure ratio 2.5 (22 PSI) 7000 rpm =======
========= 578 CFM max flow for a 2.2 Liter at .85 VE pressure ratio 2.5 (22 PSI) 7000 rpm =======
HKS GT2835 400 hp 580 CFM at 22 PSI
MRT 400 580 CFM at 16 PSI <--- added
AVO 400HP 580 CFM at 17.5 PSI
MRT 450 650 CFM at 19 PSI <--- added
AVO 450HP 650 CFM at 20.0 PSI
SR 40 650 CFM at 22 PSI <--- added, got lost some how in editing
========= 658 CFM max flow for a 2.5 Liter at .85 VE pressure ratio 2.5 (22 PSI) 7000 rpm =======
HKS GT3037 460 hp 670 CFM at 22 PSI
PE 1820 680 CFM at 22 PSI <--- estimated from manufactures rated max power
20G 695 CFM at 20.0 PSI <--- added
HKS GT3040 490 hp 710 CFM at 22 PSI
AVO 500HP 725 CFM at 23.0 PSI
SR 50 770 CFM at 22 PSI
GT-30 790 CFM at 22 PSI
60-1 800 CFM at 22 PSI
HKS GT3240 570 hp 830 CFM at 22 PSI
GT-35R 880 CFM at 22 PSI
T72 1000 CFM at 22 PSI <--- note you would have to run a 2.0 L engine
at >40 PSI boost to flow this much air
Conversions used where I had control over conversion factors:
1 HP approx equals 1.45 CFM
1 CFM approx equals 0.0745 lb of air/min
0.108 Lb/min approx equals 1 hp
1 Meter cubed/sec = 35.314 CFS = 2118.867 CFM
1 KG/sec = 132 lbs/min approx equals 1771.812 CFM
power coversions:
1 PS = 0.9859 HP = 75 Kgf m/sec
1.3405 HP = 1 KW
1 HP = 746 watts
source:
http://forums.nasioc.com/forums/showthr ... did=278517
So @14.7 psi (= 1.0 bar here in the place where people drive on the wrong side of the road
) the 60-1 CFM is 725 = 54.01 lb/min and the 18g is 600= 44.7 lb/min and the difference between the two is 125 CFM=9.31 lbs/min
also found this:
comparing the two wheels (considering the td06sl2 turbine) it seems like both have a range starting at around 200ish or so hp, with the 60-1 going all the way to 430, while the 18g stopping at 360-370...
From what I understand a turbocharger using the 18g wheel use more boost than one using the 60-1 comp wheel.
What i dont understand is: lets say we want 330 hp, is it correct to assume the 18g would want to see a good bost level (might be in the 1.2-1.4 bar range) while the 60-1 might still be under 1.0 bar? Or might it be that the 60-1 will turn into a very expensive hair-dryer with few to no benefits for power figures this low?
