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Old 12-06-2013, 02:14 PM
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Help with HEI 283 Please

I have a 63 Impala 4 door with a 283 and PowerGlide 2 speed.
I have Edelbrock open air cleaner / Edelbrock Performer 2010 manifold / Edelbrock 1404 500cfm carb and a MSD HEI distributor 8365.
Im new to the distributor tuning and need help with what springs and stop bushing to use?
What timing am I looking for?
Any help with what to do here would be great.
Thanks!

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Old 12-06-2013, 03:12 PM
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Stock cam?
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Old 12-06-2013, 03:24 PM
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I think so but not 100% sure. I would say yes bc it was all original. Motor was rebuilt from a past owner.
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Old 12-06-2013, 03:27 PM
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Looking to get 36 total I think. I believe it red lines at 5500 RPM
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Old 12-06-2013, 04:34 PM
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OK, the first thing you need to do is to validate the damper/timing tab so you can time the motor with a light.....
http://www.crankshaftcoalition.com/w...op_dead_center

Once that's done, I would put 12* in at the crank and 24* in the weights for a total initial and centrifugal of 36 degrees, all in by 2800/3000 rpm's. The non-adjustable vacuum cannister may provide too much vacuum advance, so I'd use an adjustable limiter for the vacuum advance and try it at all different adjustments to find what the motor likes. MSD part number 84281.....
http://www.msdignition.com/instructi...MSD+Pro+Billet
http://www.summitracing.com/parts/msd-84281
Begin with the least amount of vacuum advance and increase as necessary for max mileage without bucking or pinging.

Last edited by techinspector1; 12-06-2013 at 04:40 PM.
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Old 12-06-2013, 06:26 PM
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Ok Only prob is I dont have much room to turn the distributor. I can go about 8 deg advanced before the distributor wire housing starts to hit the firewall.
Would doing 8 deg advanced with 1 light silver and 1 light blue spring giving full vac between 1200-3000 RPM and a red stop bushing at 28deg. Would this give me the 36 total Im looking for?
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Old 12-06-2013, 07:22 PM
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Quote:
Originally Posted by CrashDFWFO View Post
Ok Only prob is I dont have much room to turn the distributor. I can go about 8 deg advanced before the distributor wire housing starts to hit the firewall.
Would doing 8 deg advanced with 1 light silver and 1 light blue spring giving full vac between 1200-3000 RPM and a red stop bushing at 28deg. Would this give me the 36 total Im looking for?
If you encounter physical interference with the distributor body, move all the wires counterclockwise in the cap by one hole. The wires don't care where they are in the cap, as long as they're in sequence according to the firing order.

I have no idea what springs will do what. Experiment with them until you figure it out.
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