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Old 11-26-2005, 02:26 PM
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Initial timing on Pontiac 400?

The car has 400 with 3000 stall. I dont know the cam specs, but it i know it a fairly big hydraulic. Car does not have power steering or power brakes. The ignition is a mallory. I took the distribuotr out ot replace the o-ring gasket and got the timing screwed up. I did not look at the initial timing before i pulled the distributor because the battery was in the trunk. I just now set the car to 8 degrees initial timing @800 rpms. The vacuum advance is not being used. The car runs ok. What should I set the initial timing at and does the vacuum advance not being hooked up affect what the inital setting should be. I'm guessing total advance would be unchanged? thanks, joe

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Old 12-06-2005, 09:01 PM
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Hook up the vacuum advance ,so it will have more advance at full vacuum, all you got that way is centrifugal advance and it just comes in as rpm's increase.
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Old 12-07-2005, 04:56 AM
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Hook The Vacuum Back Up

If I were you I would hook the vacuum back up. I tried this with my 400 Pontiac and the response wasn't there. I hooked her back up and the bottom end was much better. Also If I'm not mistaken the timming was 12 degrees for a stock motor but please don't quote me on that. I've played with my timing since and I turned a few degrees till I had the response I felt was the best. I'm running a mild Crane cam with thier rockers. See my photo album to see my play toy. 74 Firebird Formula 400.


There's nothing like a sweet sounding Pontiac!!!
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