How to make a timing tape
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===Find TDC=== | ===Find TDC=== | ||
| − | You need to know (or verify) that the TDC or "0" degree line on the damper or balancer (henceforth to be called a "damper") and the timing tab or mark actually correctly represents "0" degrees (TDC). On the SBC for example, there are three commonly encountered timing tab/damper lines that can be mismatched, causing an incorrect | + | You need to know (or verify) that the TDC or "0" degree line on the damper or balancer (henceforth to be called a "damper") and the timing tab or mark actually correctly represents "0" degrees (TDC). On the SBC for example, there are three commonly encountered timing tab/damper lines that can be mismatched, causing an incorrect reading. More on this at [http://www.crankshaftcoalition.com/wiki/Timing_tabs_and_damper_TDC_lines_SBC Timing tabs and damper lines SBC]. |
One method to find TDC is by using a piston stop and fabricate a timing "tab" (often a stiff piece of wire secured behind a convenient bolt head) that aligns with the line on the damper to represent "0" or TDC. Help with this can be found at [http://www.crankshaftcoalition.com/wiki/Determining_top_dead_center Determining top dead center]. | One method to find TDC is by using a piston stop and fabricate a timing "tab" (often a stiff piece of wire secured behind a convenient bolt head) that aligns with the line on the damper to represent "0" or TDC. Help with this can be found at [http://www.crankshaftcoalition.com/wiki/Determining_top_dead_center Determining top dead center]. | ||
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*You can also measure the length between the timing tab marks and transfer them onto tape, i.e. if there's 3/4 of an inch (0.750") representing 10º on the tab, two marks 3/4 of an inch (0.750") apart on your tape will also be 10º. This will work- provided that the timing tab is correct for the application and not for a different diameter damper. | *You can also measure the length between the timing tab marks and transfer them onto tape, i.e. if there's 3/4 of an inch (0.750") representing 10º on the tab, two marks 3/4 of an inch (0.750") apart on your tape will also be 10º. This will work- provided that the timing tab is correct for the application and not for a different diameter damper. | ||
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| + | ===90 degree lines=== | ||
| + | It's a good idea to mark the tape at 90 degree increments starting from TDC. These 90 degree lines can be used when adjusting valves, for example. | ||
==Correct orientation of timing tape== | ==Correct orientation of timing tape== | ||
| − | [[File: | + | [[File:Timing tape on dampr.jpg]] |
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