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Old 12-22-2008, 02:26 PM
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HEI distributor help

i have been playing around with my timing on my 454 BBC and have run into a problem. i installed a Mr. gasket recurve kit that came with weights and springs , set my base timing at 12 to 14 , but all i can get out of my centrifugal timing is anywhere from 12 to16 degrees no matter what spring combo i use. if anyone has any ideas to help with this problem let me know, thanks

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Old 12-22-2008, 03:34 PM
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The kit should have also had a part that goes on the pins of the main shaft, which is curved for the weights to act upon as they swing outward. Have you tried using the weakest springs and revving the engine to 2500 and then set your total timing? Depending on the engine you may need 34-44 degrees total not including any vacuum advance. This may make you base timing 20+ degrees which may be hard to start when hot. Otherwise, you may have to get an MSD HEI.
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Old 12-22-2008, 04:54 PM
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installed center piece and weights, ran it with heavy and light springs and with them mixed, checked the shaft it was not sticking ,seemed to advance all the way and snapped back easy. did a lot of testing this weekend and with getting my base and centrifugal at around 24 to 27 degrees total and with my vacuum bringing it to around 32 to 35 it sure did run good. no knocks, no hesitation and light up the tires, so i'm hopping if i can find out the problem it will run even better
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Old 12-22-2008, 04:58 PM
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HEI's came in a host of mechanical advance amounts. Some would swing 30 and some only 10. The weights and springs help but if the slots are too short from the factory, nothing will help. You could have one that was made for minimal advance, no matter how you do the springs and weights. The slots where the pins come up through will limit the total mech advance.

Mark
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Old 12-22-2008, 06:12 PM
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Dremal tool can fix that real fast.
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Old 12-22-2008, 07:18 PM
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Originally Posted by johnsongrass1
Dremal tool can fix that real fast.

Yes it can!! LOL Providing you know were to grind.
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Old 12-22-2008, 08:20 PM
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well i have a dremal LOL, guess i'll pull it out christmas day and try it out, other than the advance it works just fine, i'll try that before i spend 200.00 on a new one. just in case i will need to buy a new one, what are some of your throuhts on the best one out for a street truck, msd, Mallory, accell, pertronix.
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Old 12-22-2008, 09:51 PM
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For a driver, I have bought 2 of these and am more than happy! Over 2 years now and still doing fine!

New SBC HEI
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Old 12-23-2008, 11:22 AM
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thanks for the help
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Old 12-23-2008, 12:10 PM
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Have you verified that you have the weights and center piece all installed the correct direction? You can install that stuff upside down / backward and not have much luck with getting advance out of it...... don't ask me how I know on that one
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Old 12-23-2008, 02:18 PM
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Originally Posted by Jmark
For a driver, I have bought 2 of these and am more than happy! Over 2 years now and still doing fine!

New SBC HEI
I have one of those in my '69 Chevy C-20. Works great.
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Old 12-24-2008, 06:02 AM
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checked the weights a few times just to make sure and they were in the correct way
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