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Old 01-14-2013, 08:08 AM
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So I played with the truck a little this weekend and to my suprise it does start with 23* initial(no comments needed here). I unplugged the vacuum advance and its all in at 36*. Now come the questions.
Are my only options for limiting my mechanical to braze or stick something in the hole on/next to the center plate? Is there anything I can purchase for my HEI that would limit/ allow my to have only 10-12* mechanical?
Is it normal for my timing to bounce around slightly when check it with the light?
I didnt get to drive it without the vacuum advance plugged in to see if it shutters/bucks/bogs but will sometime this week. Just for reference when I built the motor I used a piston stop to find 0 on the dampner and have timing tape on it so its accurate. Thanks to everyone that posted on here. I will be back when I have more info.

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  #17 (permalink)  
Old 01-14-2013, 12:42 PM
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Quote:
Originally Posted by tcarlx View Post
So I played with the truck a little this weekend and to my suprise it does start with 23* initial(no comments needed here). I unplugged the vacuum advance and its all in at 36*. Now come the questions.
Are my only options for limiting my mechanical to braze or stick something in the hole on/next to the center plate? Is there anything I can purchase for my HEI that would limit/ allow my to have only 10-12* mechanical?
That's the easiest thing to do. Once you get the hole tapped and the head of a few screws ground down (most times it takes a few tries to get it perfect), the rest is easy.

There is the option of buying an MSD distributor then forking out for custom bushings ($33), but that's a lot of money.

Quote:
Is it normal for my timing to bounce around slightly when check it with the light?
Timing hunting around can be from a chain w/too much play, the cam walking in and out (is this a retro roller w/a cam button?), excessive distributor end play, wear to the distributor/cam gear(s), a damper w/a loose outer ring, a loose damper-to-crank, to name a few.

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I didnt get to drive it without the vacuum advance plugged in to see if it shutters/bucks/bogs but will sometime this week.
If it's limited to 10-12 degrees you shouldn't have any surging like can happen if there's too much timing at light throttle cruise when the vacuum advance is all in. When you get ready to hook it back up use ported vacuum.
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  #18 (permalink)  
Old 01-14-2013, 11:17 PM
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What is the final reaer ratio and tire diameter? It makes a huge difference.
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1406 edelbrock 600, rhoads lifters, sbc thumpr cam, sbc vortec heads

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