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Super Stock / Pro Street and Modified Discussion 55-56-57 Super Stock / Pro Street and Modified Discussion 55-56-57 Talk engines, race tracks , setup's etc

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Old 03-22-2017, 08:43 AM   #51
63chevytoo
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Originally Posted by hotrodg726 View Post
In my opinion you should use the biggest bushing in the msd to limit the total distributor advance to around 10 degrees. this will allow for a timing setting of 24 degrees initial and 34 total. should be pretty safe there. however if it runs good as is it might be ok. also depends on weather you have iron heads or aluminum. aluminum heads add a lot of resistance to detonation.
My 383 had MSD dist. 6AL box.
I run 27 initial and 10 mechanical 37 total. I tried 28 and 10 and it made no difference.
I tried locking it out at 38 and it "huffed? back through the carb when it was heat saturated. 10.4:1 compression Dart Pro1 alum. heads mech. roller cam.

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Old 03-22-2017, 08:54 AM   #52
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You need to redo the carb settings when you get the timing corrected.


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Old 03-22-2017, 08:54 AM   #53
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Thanks Phil - just curious, what motor do you have? Did it ever run within normal timing range with the mechanical advance enabled?
It's a 10.3:1 383 and it ran fine when it had the old HEI in it, before I switched to the Pro Billet. Initial was like 16 and total was like 36 degrees if I remember correctly.

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Old 03-22-2017, 09:37 AM   #54
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Need to verify TDC on the balancer.

A positive stop spark plug will work for an assembled engine.

http://www.oreillyauto.com/site/c/de...0869&ppt=C0150

Rotate the engine until it stops then mark the balancer @ the timing tab.

Back the engine up until it stops put another mark on the balancer.

Center distance between the 2 marks is TDC.
Thanks! I never knew of those. Looks like a handy way to find TDC. I'll get one on my way home. I presume you ONLY want to use that while turning by hand.
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Old 03-22-2017, 09:45 AM   #55
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The plug has tabs on it where it will only plug in one direction. I did notice however, that the purple wires did not line up. I thought this was just their design. I better look into that.
You are right the plug only goes in one way. In the picture I am posting I did not change the wire on the one that says wrong. That wiring came from MSD wrong. If that wire is wrong, it will change your timing as much as 15 degrees. It will take you 2 seconds to check the green wire goes to the black and purple. The purple wire goes to the black and orange. MSD told me to switch the wires in the plug, but I had an extra wiring harness. If you doubt me, call MSD direct and they will confirm also. Maybe MSD changed your plug on the box side. Check that too.
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Old 03-22-2017, 10:03 AM   #56
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You are right the plug only goes in one way. In the picture I am posting I did not change the wire on the one that says wrong. That wiring came from MSD wrong. If that wire is wrong, it will change your timing as much as 15 degrees. It will take you 2 seconds to check the green wire goes to the black and purple. The purple wire goes to the black and orange. MSD told me to switch the wires in the plug, but I had an extra wiring harness. If you doubt me, call MSD direct and they will confirm also. Maybe MSD changed your plug on the box side. Check that too.
I remember looking at that and thinking it was weird. The purple wires do not line up. If I'm reading your statement correctly, then mine is right. It looks like the wires on the left in your picture.
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Old 03-22-2017, 10:35 AM   #57
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yes, pull the plugs and hand rotation only. Once you have tdc sorted out, now you can go on to setting up your timing events properly.
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Old 03-22-2017, 11:00 AM   #58
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yes, pull the plugs and hand rotation only. Once you have tdc sorted out, now you can go on to setting up your timing events properly.
Copy that
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Old 03-22-2017, 01:41 PM   #59
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I am not trying to hammer home that I am right or wrong, but the problems you are having are almost the same problems I had on my timing and scratched my head for quite a few days to figure out. If for some reason if the plug was backwards on the MSD box end that would make the distributor wires correct but the system would still be backwards. So you would probably have to call MSD and find out which way the wires go on the box end. Not trying to be right or wrong, just something to check.
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Old 03-25-2017, 05:06 PM   #60
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I called all over town looking for a TDC finder and could not locate one. All special order. So I made one from a 1/2 of a shish-ka-bob stick with a piece of wire taped to it so it would not get lost in the cylinder. Then just used a rag to spin the flywheel.

As it turns out, I hit the TDC at 10 degrees on the damper lined up on the zero on the tab. Exactly the amount that I suspected it was off after firing it up for the first time and setting it by ear.

Now my timing is set from 16 (was 26) at idle, to 34 (was 44) under high RPM, with the 18 degree bushing put back in the distributor.

Thank y'all again for all of your input!

Regards,
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