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429 timing settings. Info and help please.
#1
Just want to keep this very short. I was asked by a friend who owns a J code Mach 1, if I could time the ignition for him. Problem is, I know practically nothing about 429's. The motor dose run, but is not optimal. I expect I'll need to play with the carb as well. If I apply the basic from my mega experience with 351 C's, would I be in the ball park? I do have a spare distributor that I may be able to use if necessary, with a 10L (20 deg.) slot already modified. Suggestions please?
He also has a Boss 351 and it too needs a timing tune up. That motor is not stock, roller cam etc. although it is the original motor to the car. Until I see it, I don't know if it is a dual point dizzy or not. Could be a pita for sure, but at least now, I know Pertronix have a P III for dual point ignitions!!
Geoff.

I learn something new every day!
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#2
Setting the base timing on a 429 is no different than any other engine. Setting the dwell on dual points is a different story, the procedure is outlined in the shop manual.


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#3
(04-22-2019, 07:33 PM)Hemikiller Wrote: Setting the base timing on a 429 is no different than any other engine. Setting the dwell on dual points is a different story, the procedure is outlined in the shop manual.

 The shop manual! Why didn't I think of that. 
However, as we know, some of numbers given in manuals were based on the emissions requirements and not necessarily for performance. So a good place to start for sure. 
As for the dual points, I'll have to figure that out as I go I guess if indeed the Boss has a dual point distributor still in it.
Thanks,
Geoff.

I learn something new every day!
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#4
runninpony 
Stanglover, maybe your friend should join us and become a member!?

71-73 Mustangs never die, they just go faster!
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#5
If you have set single points gap, dual will not be an issue. You will need some sort of test meter to read the dwell to check it after you set the gaps.

https://www.jalopyjournal.com/forum/thre...or.459917/
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#6
+1, I'd love to see the 429 and the boss...

For the 429, I know my 71 has the original autolite dual vacuum. If uncertain about these two and engine has to be started for first time (in long while or after rebuild), may be its wise to first set the timing without them active, once the car has a steady idle you could move on to reconnect if that's the case.
For the rest, as @hemikiller says, it's just like a 351c or any engine.

73 modified Grandé 351C. Almost done. 
71 429CJ. In progress
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#7
(04-23-2019, 05:44 AM)NOT A T5 Wrote: Stanglover, maybe your friend should join us and become a member!?

 I agree, tried that approach already. He just doesn't seem interested in "joining anything" 
I will suggest he join again when I see him.

I learn something new every day!
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#8
(04-23-2019, 06:42 AM)Bill73Ragtop Wrote: If you have set single points gap, dual will not be an issue.  You will need some sort of test meter to read the dwell to check it after you set the gaps.

https://www.jalopyjournal.com/forum/thre...or.459917/

Bill, that's probably why he asked if I could do the timing for him as he knows I have the equipment to do it. I just have not worked on a 429. It's the best initial timing and total mechanical advance I could use some information on. We all know 351's like way more initial than the book says.
As for the Boss, I'll have to wait and see what's in it. For all I know right now, he may have stuck an HEI in it!!!
I'll check out your link, so thanks for that.
Geoff.

I learn something new every day!
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#9
(04-23-2019, 06:56 AM)Fabrice Wrote: +1, I'd love to see the 429 and the boss...

For the 429, I know my 71 has the original autolite dual vacuum. If uncertain about these two and engine has to be started for first time (in long while or after rebuild), may be its wise to first set the timing without them active, once the car has a steady idle you could move on to reconnect if that's the case.
For the rest, as @hemikiller says, it's just like a 351c or any engine.

Thanks for your input Fabrice.
I think I really need to go see the cars again, been a while, so I know exactly what distributors are in them. My friend is great with body work, but not so much when it come to mechanicals. I'm no expert either, but I have learned so much from being a member and figuring out my own 351C 4V.
The Boss I'm not so much worried about, but as I said before, it's the sweet spot on the 429 I'd like a heads up on.
Geoff.
PS Yes, I'll take some pics when I see the cars.

I learn something new every day!
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#10
Hi Stanglover

I have my 429 set at 14 initial and 32 all up.

Starts easily and runs sweet as with these settings.

Shane

Adelaide

73 Mach 1
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