No worries.
We’re all here in some form or another to learn.
I a very broad , and I mean wide latitude , he’s right. However he’s not exactly sure as to why. Don’t take my word for it, it’s in his answer.
If you look at the thing as a complete engineered solution, or a total package if you will, you’ll see what I’m about to say is true.
We can take one of those distributors Kenth listed and I can supply you light enough springs that the weights override the center cam and dump a load of degrees extra over what Delco rated the distributor for in the first place, consequently I can find you some hood springs that won’t allow the weights to reach half of what Delco said it would.
So in that he’s right, but now you’ve gone completely outside both ends of the design. And now “you” become the engineer.
Everyone pretty much knows at least the ones that have been on this site for the last 25 years that the advance cam is the limiting factor on these HEI’s ….unless you do something goofy with the springs. And there are some on the list that the factory springs can’t seemingly control either, but those were actually limited by the engine rpm that the engine in question was designed as from the beginning. No one ever was supposed to turn a 4.3 Chevy V6 8000 rpm in a stock 1500 Chevy.
If you did GM would’ve considered you on your own. However you put that distributor in something that will turn 8000 , well your still on your own, you’ve now exceeded the original design parameters of the intended application.
I’ll not address the recommendation to disable the or (A) vac advance for a street driven car or even about 50% of the race cars I’ve been around as that idea or concept purely comes from one of two things or a combination of both….
Lack of understanding or lack of proper calibrated parts to begin with.
And I understand full well the implications of what I just said there cause there will be a useful example coming to illustrate if needed.
I’ve shown about 4 customers their distributor as they brought it to me on the machine without any modification other than their installed Moroso curve kit. All 4 demonstrated approx some 55+ crank degrees if centrifugal advance going exceedingly faster the more the rpm was cranked….
I don’t have the luxury of wondering how far they’ll go, I’ve watched it and fixed the correction for them mor times than I care to count.
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