401 Timing specs

Discussion in ''Da Nailhead' started by BuickStreet, Jun 27, 2002.

  1. BuickStreet

    BuickStreet Guest

    I'm going in for another Dyno tune tommorrow (I'll post the results). My 401 powered Electra has just received a new quadrajet carb which sits on a '66 425 intake (so the bores match) and runs on 98 octane premium unleaded and '104' brand octane boost. It feels good and I know I'll get more than last time (200 bhp at the rear wheels).

    I need some timing specs because he is going to pull the distributor out and give it the once over. I run Pertronix system with a Crane high performnace Coil. I noticed that the stock 2.5 degrees is no where near as powerful as when I adjust it up to around 5-7 degrees but of course as soon as I give it the juice it starts pinging at which point I immediately let off and re-adjust until it stops pinging (and then a bit less to be sure). Back to boring 'old lady style' safe and retarded. Boring :boring:

    I want to take advantage of the increase in power at the lower revs while not destroying the motor by over timing it on the top end as a result. I've asked this question before my last tune-up of some groups and have seen the suggested timing specs for good allround peformance but when I took those specs to the mechanic he balked and said "no way, man. I'm not bringing it all in until at least 3,500). I think the spec I told him was 32 degrees, all in by 2800 rpm.

    I have seen this spec mentioned a few times around the net and was wondering if I should insist or what? Can someone suggest the best timing or what works best for a heavy car with a driver who has an even heavier foot.


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