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Initial Timing 351C
#1
What do you guys recommend to run for initial timing with a stock 351C 2v with 680 carb, performer intake, and long tube headers?? I believe stock timing is around 6* if I remember right??  But that seems to be a little low. I have also added the duraspark ignition that has the white wire hooked up that will retard the timing a few degrees on start. I was thinking of starting around 12* and go from there as a baseline. What do you guys think?? Not sure what my total advance is on this distributor...haven't checked it yet. Its a stock duraspark dizzy from a 76 Lincoln 460.

Kevin

1971 Mach 1
408C Stroker
C4 w/3,000 stall
8.8" Rear w/3.73's
Disc brakes all way around.

[Image: 28ivsix.png]




                                                                                             
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#2
Good place to start is 12 to 14 .
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#3
(02-27-2019, 01:58 PM)Canted 393 Wrote: Good place to start is 12 to 14 .

+1

73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

- Jason


[Image: 082-hot-rod-power-tour-2017-1970-1970s.jpg]
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#4
I'm more of a 10* kinda guy Big Grin


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#5
11.5 Big Grin Anything between 8 and 16 could be acceptable. I generally get em to idle well and crank/start easily using my vacuum gauge (Turn distributor to get maximum vacuum and then back off just a bit). Set your idle speed and adjust your idle mixture screws and reset your idle speed. At this point you should have a smooth idle then with the engine at 3K check the all in timing for being in the neighborhood of 32-36 degrees and just let the base timing be whatever it is for the initial test drive. I then let my observations lead to further fine tuning.

[Image: 1_01_07_15_8_53_18.png]

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!
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#6
Think mine is around 16 or so and you need to pair that with the vacuum reading.

mike

[Image: 1_11_11_13_11_50_27.png]
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#7
Thanks guys!! What vacuum should I be checking? Manifold or the timing port?? Been a while since I did it!!

Kevin

1971 Mach 1
408C Stroker
C4 w/3,000 stall
8.8" Rear w/3.73's
Disc brakes all way around.

[Image: 28ivsix.png]




                                                                                             
  Reply
#8
I would check manifold vacuum.

mike

[Image: 1_11_11_13_11_50_27.png]
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#9
Manifold

If you use ported vacuum for the advance (I do not, but there is a difference of opinion on this and my engine is about as stock as Madonna Louise Ciccone 's virginity.) it would only work after the engine was fully warmed and for the all in setting, at idle you wouldn't be able to adjust for max vacuum.

[Image: 1_01_07_15_8_53_18.png]

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!
  Reply
#10
Thanks fellas!!!

Kevin

1971 Mach 1
408C Stroker
C4 w/3,000 stall
8.8" Rear w/3.73's
Disc brakes all way around.

[Image: 28ivsix.png]




                                                                                             
  Reply
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