460 Straight up Timing Chain upgrade

[ArdWrknTrk]

Man, I wish you would have elaborated on "engineer" a long time ago....

You speak the language of my people!  

[viven44]

Yes its interesting that it holds the highest vacuum level observed at the input, a simple decoupling capacitors would filter out AC and pass DC nominal value from the input waveform but here this device is passing the nominal vacuum signal + fluctuations = peak vacuum signal. My electrical knowledge is below-par for someone trained in electrical engg. since I have only worked with polymers, epoxies, metals, Solder alloys the past 15+ years so take what I say with a grain of salt

[viven44]

I try Jim, but I am just an average dude and not sure if I can keep up with Savants

[ArdWrknTrk]

Ohhhh Reallllllly!      🤯

My father was director of engineering at Perkin-Elmer when they were grinding lenses for certain 'satellites' and started a company 'Cast Optics' because the lenses were too heavy to loft back in the early '60's.

He was also into optics as a hobby, stemming from his interests in photography as a kid.
He hung out with Edmund Land.

He developed the technique to cast thick acrylic sections without boiling or needing to be annealed.
I can smell hydroquinone a mile off! 😂

When I was born he was working at a government contractor 'Barnes Engineering'
grinding beryllium mirrors for the first infrared detecting 'early warning' satellites at the peak of the cold war.

Should I continue to regale you with stories from my childhood?  🤔

[viven44]

Yes I love stories! If Gary sets up a bullnose meet it would be a great opportunity to meet everyone!

[ArdWrknTrk]

We should have a BBS or chatroom just for geeks.


My sister and I are looking at doing a podcast of all the outrageous things we've been through as autodidactic freaks and trauma survivors.

[Gary Lewis]

Gary has a Bullnose meet in September in Skiatook.  That's too far for many to come, although Jeff did from Quebec last year and some did from Australia and New Zealand a few years ago.

Anyway, Gary might attend if someone else sets up another meet.

[viven44]

Not to put pressure on you Gary, but you are the namesake of this website and “head” so to speak so would have the highest chance of attracting participants for a meet. If it’s this September 2024 I’ll probably be able to come up to OK.

[ArdWrknTrk]

Go up to 'forum & website discussions' suggest a Discord channel.

[ArdWrknTrk]

We also have a suggestion for Carlisle or Harrisburg PA.

[viven44]

What is Discord ?  Sorry I’m old school for my age.

[ArdWrknTrk]

It's basically a 21st century chat room

[viven44]

Gotcha. I found something called Facebook Marketplace just last year and Facebook Groups just a few months ago and that has gotten me in a lot of trouble. I probably should stay away from more exposure in the cyberspace and its possibilities.

[ArdWrknTrk]

If you've been on FB then you should know that they have closed groups, by invitation only.  💡

If we want a back channel on this stupid forum software we're going to have to set up something outside of this software...

It's almost like an alternative is sitting right in front of us...  🙄

[Gary Lewis]

I do hope you can make it in September.  I know how far it is.  

As for a back channel, many of the forum software packages have capabilities like that.  And given what Mr Nabble told me this week, we will need to move.  So now we need to find the right package.

[viven44]

If schedule permits, count me in!

By the way, Gary, Kudos on getting it right that the vacuum level should not drop through the VREST. I had assumed it would through an orifice. Happy to admit when I'm proven wrong.

[Gary Lewis]

I hope you can come!  I'll share more details as we get closer.

As for the vacuum restrictions, I'm guessing that they are put in the line from the ported vacuum fitting on the carb, so has some vacuum from when you are driving and as you stop the vacuum drops slowly until it goes to zero.  And if the coolant gets too high then the manifold vacuum comes in to speed the engine up.

[viven44]

Hmm.. The vac diagram from the 1984 shows that the VREST sits between manifold vacuum and distributor when cold. And as far the ramp up/down slowing if I recall correctly in my trials, VREST doesn't provide that benefit. Its bi-directional, vacuum ramp up and downs using my hand pump were pretty much instantaneous. When vacuum was disconnected, drop to Zero was instantaneous. In electrical analogy, if this was a capacitor its very low capacity i.e. not able to hold vacuum except what is needed to smooth out high frequency fluctuations.

The emissions book did have a description page for every vacuum device out there so I did observe that the 3 port switch could be connected to ported vacuum when cold. I'll probably scan all of those pages at some point and send a .pdf.

[Gary Lewis]

Yes, it does show that it goes to manifold vacuum.  And if it is almost instantaneous in dropping the vacuum then I don't understand how nor why it works.

As for the emissions book, if it is the Engine Emissions/Diagnosis book then we have the 82 and 86 versions on the site.  I'd welcome another, but if you scan it please do so at 600 dpi if you can.  I run an optical character recognition program against the files so people can search for text and 600 dpi makes that work best.

[ArdWrknTrk]

It is a small orifice. It damps pulses even if you think it has no effect, it does or they wouldn't have bothered.