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Old 03-29-2010, 08:08 AM
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Small Block Chevy Timing

Just completed a cam swap on a 350 Chevy. I have started an ran the motor for the initial 20 minute break in and have a question on timing.

I have a fixed pointer on the front of the timing cover that bolted to the side of the cover. The keyway on the balancer is 10 degrees from the crank keyway (TDC). Do I use the true TDC of the motor where the keyway is located or the plus 10 degree on the balancer for timing? Or do I calculate the -10 degrees when setting timing?

I am aware I have the right balancer and that the balancer timing mark should be 10 degrees away from the actual keyway on the balancer, just wanted to know which to use.

Thanks for your time.

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Old 03-29-2010, 02:53 PM
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Find True TDC using a pistons stop and position the timing tab properly.
Bolt it on bend it as required to true it up and then tack weld it to the timing cover.

The bolt on timing tabs are never right. Last one I did was off by 4 degrees.
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Old 03-29-2010, 02:54 PM
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Quote:
Originally Posted by F-BIRD'88
Find True TDC using a pistons stop and position the timing tab properly.
Bolt it on bend it as required to true it up and then tack weld it to the timing cover.

The bolt on timing tabs are never right. Last one I did was off by 4 degrees.
Thanks for the info, will do.
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Old 03-29-2010, 03:57 PM
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Quote:
Originally Posted by f7firecat
Just completed a cam swap on a 350 Chevy. I have started an ran the motor for the initial 20 minute break in and have a question on timing.

I have a fixed pointer on the front of the timing cover that bolted to the side of the cover. The keyway on the balancer is 10 degrees from the crank keyway (TDC). Do I use the true TDC of the motor where the keyway is located or the plus 10 degree on the balancer for timing? Or do I calculate the -10 degrees when setting timing?

I am aware I have the right balancer and that the balancer timing mark should be 10 degrees away from the actual keyway on the balancer, just wanted to know which to use.

Thanks for your time.
You might find either or both useful:

DETERMINING TDC

AND

MAKE A TIMING TAPE

If the damper mark doesn't match the tab, a new line can be made on the damper to match your current tab, and the timing tape lined up to the new mark, if you do not want to make/alter the tab you now have.

The timing tape can be used to set the timing curve if you don't have an accurate dial-back timing light.
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Old 04-14-2010, 08:36 PM
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Thank you gentleman, worked out well for me.
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