Re: Timing Question
[Re: jeebis44]
#2171519
10/10/16 03:46 PM
10/10/16 03:46 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I would proportion some race gas in there to elim the potential of any pinging for the breakin to get that over and done with with no issues. I would set the initial at 15 & use the FBO dist with the total at 35 (15+20 in the slots) with the can plugged in which will add more and springs selected to max at ~2500-3K, roughly the range that your breakin RPM will be at. or the OE dist with the heavy spring with the elongated loop one one end, toss it & keep the light spring in there & if you have a parts dist (2) light springs would be even better & can plugged in also. #1 #1 splurge on the octane to elim any possibility of pinging during the breakin. we can fine tune the dist later for your choice of lesser octane gas for your app.
live every 24 hour block of time like it's your last day on earth
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Re: Timing Question
[Re: jeebis44]
#2171953
10/11/16 04:20 AM
10/11/16 04:20 AM
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Joined: Jan 2003
Posts: 5,791 Hamilton, Ontario Canada
Magnum
master
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master
Joined: Jan 2003
Posts: 5,791
Hamilton, Ontario Canada
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With a unique combination like that you will need a dyno or track time to dial in your total timing.
I had a 5.9L Magnum engine with a 670 Holley, M1 dual plane intake and headers. Same combustion chamber as you. I set my total timing to the fastest pass at the track which ended up being 31 degrees for total.
69 Super Bee, 93 Mustang LX, 04 Allure Super
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Re: Timing Question
[Re: Magnum]
#2172166
10/11/16 02:18 PM
10/11/16 02:18 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Magnum is dead on, with CC heads I would limit the total to 31 instead of 35
live every 24 hour block of time like it's your last day on earth
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Re: Timing Question
[Re: jeebis44]
#2173735
10/13/16 04:27 PM
10/13/16 04:27 PM
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Joined: Jan 2003
Posts: 5,791 Hamilton, Ontario Canada
Magnum
master
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master
Joined: Jan 2003
Posts: 5,791
Hamilton, Ontario Canada
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The exact number is irrelavent. Its only a starting point. A modern chamber will generally run a lower number.
If I recall correctly I too was able to go above 31 but the truck did not go any faster. Since it was a stick and a truck I ran not too close to the edge.
69 Super Bee, 93 Mustang LX, 04 Allure Super
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Re: Timing Question
[Re: jeebis44]
#2173857
10/13/16 06:18 PM
10/13/16 06:18 PM
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Joined: Jul 2011
Posts: 959 Chicago
PurpleBeeper
super stock
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super stock
Joined: Jul 2011
Posts: 959
Chicago
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Every engine is different. You should start with near-stock specifications and adjust from there. Track testing is the best or another choice is floor it up-hill with the A/C on (old-school) and listen for a ping.
I've had very good luck with stock electronic distributors, but if you have a better one, you can use that too.
The stock vacuum advance canisters are adjustable with a small allen wrench in the hose nipple on the vacuum can.
70 Roadrunner convt. street car
440+6, NOS, 4-spd, SS springs
'96 Mustang GT convt. street car
'04 4.6 SOHC, NOS, auto, lowered
"Officer, that button is for short on-ramps"
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Re: Timing Question
[Re: jeebis44]
#2177121
10/17/16 07:01 PM
10/17/16 07:01 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Thanks for the replies! What's the total advance with the stock electronic distributor? By retarding the initial, does it also retard the total? Yes, unless you go back and fix that. How you fix it depends on what distributor you are running. Stock ones involve filing slots. Regarding the vacuum adjustment, that only adjusts the vacuum required to engage it, not the amount of advance.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Timing Question
[Re: jeebis44]
#2177128
10/17/16 07:08 PM
10/17/16 07:08 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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2 common slot length are stamped 11 and 17 (22 and 34 on the crank you see with your light), way too much. the FBO $22 plate is the easiest reasonable fix for this (& has slots for 10/12/14/16 and 18 crank degrees)
live every 24 hour block of time like it's your last day on earth
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Re: Timing Question
[Re: jeebis44]
#2177131
10/17/16 07:09 PM
10/17/16 07:09 PM
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Joined: Jul 2011
Posts: 959 Chicago
PurpleBeeper
super stock
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super stock
Joined: Jul 2011
Posts: 959
Chicago
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Regarding the vacuum adjustment, that only adjusts the vacuum required to engage it, not the amount of advance.
Good tip... I didn't know that.
70 Roadrunner convt. street car
440+6, NOS, 4-spd, SS springs
'96 Mustang GT convt. street car
'04 4.6 SOHC, NOS, auto, lowered
"Officer, that button is for short on-ramps"
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