Flow Bench Data - Article by Kevin Bracken
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Comparison of flow bench performance: Carburetors, filters, stacks, etc.
    Set-up CFM    
Mk II Amal 30 mm bare with short inlet bell
30 mm w/ stock triumph air box
30 mm stock box, air horns removed
30 mm stock box, JRC-type filters
30 mm stock box, no filters
30 mm K&N RU-132, 4.5" long, large oval
30 mm K&N RU-115, 6" long, small oval
30 mm K&N RU-114, 5" long, smal oval
34 mm bare with short inlet bell
34 mm stock box, JRC-type filters
34 mm K&N RU-132, 4.5" long, large oval
34 mm K&N RU-115, 6" long, small oval
34 mm K&N RU-114, 5" long, smal oval
34 mm w/ AMAL velocity stack
34 mm vel. Stack + K&N RU-132
34 mm vel. Stack + K&N RU-115
34 mm vel. Stack + K&N RU-114
 		109.68
88.76
96.87
98.74
107.36
110.10
108.43
108.43
140.82
121.82
140.55
138.31
134.95
137.96
134.83
132.96
132.40
 		   
Bing CV 32 mm bare + adaptor tube (TRI)
32 mm K&N RU-132
32 mm K&N RU-115
32 mm K&N RU-114
 		119.96
119.96
119.96
119.96
 		   
Dellorto
pumper 		36 mm bare, short stack
36 mm bare, long stack
36 mm RU-132 w/ stack inside
36 mm RU-132 no stack
 		153.95
158.97
157.30
147.82
 		   
    All testing done on Jerry Branch's flow bench
All testing done at 12 inches water
Each carburetor was fitted to flow bench directly, without a head
Flow data corrected for atmospheric temperature
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