Ever seen a small cap dizzy like this? (1 Viewer)

[arcteryx]

Ever seen one with this twist adjuster on the back? Trying to identify the year, it’s an earlier one, ie pre 73, but unsure when. Any idea what that adjuster does? Perhaps adjust the vacuum?

 

[charliemeyer007]

I think that's an octane adjuster, timing micro adjustment.

 

[devo]

Yep I have one!

 

[4Cruisers]

Check out my Posts #26 and #27 here:

Can you identify this FJ40 Coil/Electronic Ignition?

They were off when they installed the dizzy They etched the side because they made du with what they did wrong :meh: It’s the type of thing POs do ... it’s in the PO Manual ... Chapter 2 (Get it to run if you can) in that chapter the Manual says “what ever you do, fix it much later or be ok...

forum.ih8mud.com

Also, the 1/8" copper tubing on the advancer identifies it as a very early F engine distributor. The older Land Cruisers used copper tubing from the advance port on the carburetor to the distributor. I discovered that the threads on the unusual-type compression fitting are M8X1.25, so I swap in a hex head plug drilled for 5/32" brass tube - the standard vacuum hose fits like a glove. And with the fitting removed, you can adjust the length of the internal spring to customize the vacuum advance curve. You can also swap out the spring. BTW, those stock compression fittings are hard to find these days.

 

[devo]

This is the small cap I run. It fits on the dizzy with the octane selector….. maybe not much help?

 

[arcteryx]

Thanks for the info, really cool

 

[Subterranean Nik]

I have that style on my ‘67 F motor FWIW. Agreed, octane selector.

Quick snip below on it: