1st Generation Specific 1979-1985 Discussion

Making additional timing marks

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Old 02-09-2009, 05:48 AM
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5-10-15-20-25-30 btdc















Whats the recomended timing for a half bridge?
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Old 02-09-2009, 12:32 PM
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people seem to run about 22-27btdc L, i'd start about 22 and move up.
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Old 02-09-2009, 08:12 PM
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Originally Posted by j9fd3s' post='916339' date='Feb 9 2009, 03:32 PM
people seem to run about 22-27btdc L, i'd start about 22 and move up.




thanks man



Racing Beat recomends 24 and 5 I believe, but thats for a full bridgeport



no idea when it comes to hbp engines
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Old 02-11-2009, 11:54 AM
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Originally Posted by -xlr8planet-' post='916371' date='Feb 9 2009, 06:12 PM
thanks man



Racing Beat recomends 24 and 5 I believe, but thats for a full bridgeport



no idea when it comes to hbp engines


yeah it really depends on a bunch of stuff too. how well the port flows, intake and exhaust tuning (better these are in theory the less timing you need).



also it depends on the distributor, and crank/crank pulley index. there is 2-3 degrees of play between the crank pulley and the hub it sits on (try it, put the bolts in semi snug, and try to turn the pulley)... etc etc etc



so yeah start at something safe, like 20-22L and once you get the fuel dialed in, start advancing.
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