SF-110/120

The original, industry standard SF-110 flowbench is used by professional motorcycle and automotive engine rebuilders all around the world. The rugged and durable SF-110 tests engines up to 100 hp (75 kW) per cylinder.

The SF-120 is the result of customer requests for higher intake capacity on the SF-110. Additional high-pressure motors on the intake side of the SF-120 give it 30% more intake flow capacity. To illustrate, heads that can be tested at 10" (25 cm) of water on the SF-110 can be tested at 15" (38 cm) of water on the SF-120. The advantage: higher test pressure allows operators to view results with higher resolution, making it easier to see small gains.

Flow:

Flows a maximum of 185 cfm at 15" of water (86 l/s at 38 cm). The SF-110 and SF-120 provide fast, accurate and repeatable results at any test pressure between 5" (13 cm) and 15" (38 cm) of water. Testing is typically performed at 10" of water test pressure; for smaller valves, test pressure can be increased to 15" (76 cm). With the optional FlowComT users can test at up to 25" (63.5 cm) of water.

Flow Direction:

The SF-110 and SF-120 are both capable of intake and exhaust flow direction. Operators switch from one to the other by simply turning two knobs. To change flow direction to test two-cycle engines, set the direction to exhaust. Air is then blown up through transfer ports, into cylinder heads where it exits via the exhaust port.

Flow Measurement:

The SF-110 and SF-120 utilize five flow orifices at the top of the machine and an inclined flow meter for accurate measurement. By selecting proper orifice combinations, the flow meter can be used in nine ranges from 10 cfm (4.7 l/s) up to 185 cfm (87 l/s), with all reading within 0.5%. Nine ranges increase the resolution of flow measurement as compared to a single-range system. With the SF-110 and SF-120 changes of 1% are easily detectable.