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Old 09-24-2019, 10:26 PM   #41
Tinker
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Default Re: timing advance how much is to much

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Originally Posted by flatjack9 View Post
Why would the flathead be any harder than any other engine? Most systems are a compromise. Engines are so much better today because they are controlled electronically.

Flatheads might be around longer. All that electronic and plastic has time limit less then metal. But I could enjoy 800hp and not complain!
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Old 09-25-2019, 07:21 AM   #42
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Default Re: timing advance how much is to much

While electronic engine management systems are superior they're more complicated with many parts prone to intermittent failure making them a pain to diagnose. With a flathead you can pretty much see what is or is not working. Even when it is not you can still make it home many times.
Back to the chevy distributor. As Charlies NY explained to me once, it is all about the ping. You can run a few more degrees total advance and when you open the throttle the vacuum drops out giving you enough retard to avoid pinging.
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Old 09-25-2019, 09:55 AM   #43
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Default Re: timing advance how much is to much

To a Hotrodder, nothing is ever perfect?
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Old 09-25-2019, 10:07 AM   #44
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Default Re: timing advance how much is to much

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To a Hotrodder, nothing is ever perfect?
So true!!!
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Old 09-29-2019, 03:34 AM   #45
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Default Re: timing advance how much is to much

parts arrived on Friday so Saturday spent reworking dissy reinstalled at 4 deg with 18 deg at 3500 just back from a 450 klm day run today ran like a swiss clock never mjssed a beat THANKS TO ALL for their help comments and thoughts
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Old 09-29-2019, 12:12 PM   #46
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Default Re: timing advance how much is to much

Not sure why you would ignore the timing advance numbers from Charley. Your sustem will work, but it ain't the best available. yet! 18 at 3500 is not enough.
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Old 09-29-2019, 01:55 PM   #47
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Default Re: timing advance how much is to much

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Not sure why you would ignore the timing advance numbers from Charley. Your sustem will work, but it ain't the best available. yet! 18 at 3500 is not enough.








Only Charlie has the correct info? Wow the guys original question for this post is Timing Advance and how much is to much.
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Old 09-29-2019, 02:02 PM   #48
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Default Re: timing advance how much is to much

Not only is the total advance a little low in degrees, it is coming in late isn't it? You would want total in around 2000-2400 rpms.
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Old 09-30-2019, 10:08 AM   #49
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Default Re: timing advance how much is to much

yes and done by educated guess work and checked with only a tacho and a advance check timing light not a bad effort considering the parts sent where for a different dissy not a yh series but its better than what some YOYO in the usa bolted together as i said before looks cool pity it runs like shit yes ron not the perfect curve achived but better and all advice was taken into consideration AGAIN thanks to all who took the time to reply
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Old 09-30-2019, 03:23 PM   #50
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Default Re: timing advance how much is to much

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thanks to all i asked the question and got several answers and as for them 4 big holes thats how i got it a typical buy and bolt[ looks cool who cares how it runs ] also have checked the advance and it brings on way to much way to early [that explains why it was so retarded when i got it ] so next step recurve the dissy and try again while we are here any thoughts on maybe down sizeing carbs to say 81's instead of 97's

Interested to know how the vacuum is looking now at this set up. Improved?
Phil NZ
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Old 09-30-2019, 05:06 PM   #51
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Default Re: timing advance how much is to much

yes Phil much improved now have 18" at idle 550rpm again no off idle stumble and it just drives much happier will try again when i can locate a set of YH keys and springs as mallory/msd say they are nil stock and only appear to carry the latest spares watch their freight $18 dollars us turned into $65 aus by the time it got here
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