compression ( Chris )

[Tyler Pennock]

you need to be able to supply as much unrestricted air as possible so it can be drawn into the engine, with the throttles closed your creating more of a vacuum as very little air gets by the throttle plates  at low rpm E.I.:- starting rpm and/or idle., this is a very simple explanation, but I hope you see the reason now. Tyler Pennock,VMOA # 380 Eastern-Canada Director 1987 Vmax 1260 Ottawa,ON,Canada <[EMAIL PROTECTED]>