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Old 03-22-2012, 07:13 PM   #1
Russco
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Join Date: May 2010
Location: Springfield IL
Posts: 84
Default Cam Timing question for the experts on Isky 1007B

I am building an 8BA with 286 Scat stroker kit. I have the bottom end done. The cam and valve train is all installed and lashed and as I was checking cam timing I find that the ISKY 1007B timing does not match up to the specs on the card. They are about 7-9 degrees retarded from the spec sheet on the valve opening points? (This is on the Intake I didn’t check the exhaust side yet) the card shows Int opening @.020 to be 17 BTDC its actually 7.5*. The @ .050 card numbers should be 7* BTDC and its actually at TDC (7* retarded) the closings numbers on the card are @ .020 59* ABDC and its 58* and by the card @.050 should be 49*ABDC and its actually 48* so the closing points are only off 1 degree. The centerline on the card shows 111 I’m getting 115.5 (by the opening/closing method) and 114 (max lift method) I’m pretty bummed and don’t know what I should do? I’ve never had a cam be off by this much before. Any suggestions or ideas? Thanks in advance. Mike
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Last edited by Russco; 03-22-2012 at 09:30 PM.
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