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Old 03-14-2012, 02:30 AM
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New cam in SBC350 - WHAT TIMING ? ...

Hello guys !
Can you help me....
I bought new cam for my stock 1975 El Camino (350 Stock engine, with th350 trans, Edelbrock 2101 Performer intake and , Edelbrock 1405 carb)
and i dont't know what timing should i set.
Camshaft is : .050 Duration 204/214 Cam lift .280/.295 Valve lift Int .420/ Exh .443 Lobe center 107/117

thanks
Michael

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Old 03-14-2012, 03:36 AM
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With a stock or out of the box distributor and vac adv disconnected for setting the timing. Set the timing with a timing light at 14deg BTDC. Then rev the motor up while watching the timing. It should advance with rpm up to a max of 32-36deg.
Adjust as required.

reconnect the vacuum advance.
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Old 03-14-2012, 03:37 AM
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With vacuum advance disconnected and plugged, set the base timing to 12 degrees before top dead center. Lock distributor, connect vacuum advance to the manifold vacuum source which is the port on the drivers side front of the carb, recheck timing, it should be 18 to 24 degrees before top dead center. Right away the idle is going to jump up, lower it back down to regular idle speed, then set the idle mixture screws.
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