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Original Message
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| Cam Specs + Low Vacuum = No Brakes (Long) |
| By Rick Thompson - 08/28/2002 9:30:25 AM; IP 207.19.241.194 |
Help! Here are my mechnical roller cam specs in a 427 side oiler with dual fours and 12.8:1 compression:
Lift: Intake & Exhaust: @ Cam 374 @ Valve 658
Cam Timing @.015 Intake opens 48 degrees BTDC.
Exhausts opens 90 degrees BBDC.
Intake closes 78 degrees ABDC and Exhaust closes 40 degrees ATDC.
Advertised duration on intake is 306 degrees and exhaust is 310 degrees.
Cam Timing @ .050 is :Intake opens 23 degrees BTDC and close 53 degrees ABDC.
Exhaust opens 65 dgress BBDC and closes 15 degrees ATDC.
Ok, I have about 5-7 inches of vacuum and no power brakes. Does anyone have the same experience with similar specs and what did you do to solve the problem? Anyone run one of those small external vacuum pumps? Thanks for the help |
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