Cam timing 440

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Cam timing 440 #2466212 03/14/18 03:24 AM 03/14/18 03:24 AM
Joined: Jan 2003 Posts: 84 melbourne australia R rtandy OP member
rtandy OP member R Joined: Jan 2003 Posts: 84 melbourne australia	Hi all, I have a 440 with an old Iski 505T solid cam (.505 lift Int and Ex 290/254° @ .050) 9.5:1 compression. My question is, what can I expect as reasonable idle vacuum? I am only getting 9-10 inches at the moment regardless of initial timing, is this the most vacuum I can expect from this cam? Also, I have a feeling that the cam is advanced slightly as when the engine is timed to TDC with the timing light (vacuum advance disconnected) then stopped and rotated to TDC, the rotor button is slightly past the No.1 position. Would this also have an effect on the vacuum at idle?

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