Thread: 350 spits fire when static timed

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Chevrolet used 3 different timing arrangements on the Gen I motor, 12:00 O'Clock Noon, 2:00 O'Clock and 2:30 O'Clock as you look at the motor from the front. If you have not been in possession of the motor since it was new, you have no idea of the mixing and matching of parts that has taken place over time. Also, you have no idea if the outer inertia ring on the damper has slipped on the elastometic material that separates the ring from the hub, rendering the damper invalid for ignition-timing the motor.

My best advice is to purchase this rebuilt 2:00 O'Clock 6.75" harmonic damper from Damper Doctors and match it up with a 2:00 O'Clock timing cover or bolt-on timing tab from a '69 to '91 350. Damper Doctor uses new elastomeric material, clocks the hub to the eccentric ring and presses the whole mess together under tremendous hydraulic pressure. I prefer buying a rebuilt damper rather than a new one because you know that the damper hub originally matched up with a 350 crank snout diameter at the factory. Aftermarket dampers may or may not provide the correct press fit. A correct press fit is necessary because if the hub if too tight on the crank snout, you may never get the hub seated in its correct position and your belts will not line up. If the hub is too loose on the crank snout, harmonics will not be transferred from the crank to the damper hub and onto the inertia ring to be cancelled out and you could crack the crank.
CHE3501 69-91 #6272222 12551538 10066046 2:00 TAB
Then buy this genuine Chevrolet bolt-on 2:00 O'Clock timing tab.....
Genuine GM Chevy Small Block V8 Timing Pointer 6 75" 7" Balancer GM 3991435 | eBay

Here's a tutorial that I wrote some time back that may help you....
http://www.crankshaftcoalition.com/w...op_dead_center