Model	Motor	No. of Cylinders	Piston Displacement cfm	Vacuum (Hg) Pressure inches
V335	1.5	2	21.6	29
V335T	1.5	2	10.8	29.6
V344	2-Jan	2	34.6	29
V344T	2	2	17.3	29.65
V355	5	2	60	29
V355T	5	2	30	27.7
107V	7.5	2	110	29
107VT	7.5	2	55	29.65
115V	10	3	149.6	29.2
115VT	10	3	99	29.65