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Wot he said!!! Here’s the full explanation from the link I shared above

Look what showed up today!

But I would still check the gaps with a feeler gauge to be certain they are all the same. I’m sure they will be but always good to be certain.

Its not about absorbing heat, its about keeping the tip of the spark plug at the right temperature to keep it clean but not burn. When the cylinder temperatures are higher (higher compression, different fuels etc) then the plug tip needs to be more shrouded to keep it a bit cooler. I.e. a hot plug doesn't run hotter than a cold plug, they are all meant run at the same temp. A cold plug needs a hotter cylinder to keep it at the target temperature. So if you were convinced that you change in AFRs was resulting in hotter cylinder temperatures, then you might fit a 7 plug. And then if you discover it gets fouled you could go back to a 6. If you buy the cheap standard plugs, thats not painful.

Hi Zedyone - -WOW! "Subsystem Manager for Propulsion” on the Artemis Crew module (that is still Orion right?) . Congratulations: that is a huge vote of confidence from both your Technical and Management chains. I’m sure you will do an outstanding job. (although it can come with an increased level of stress). Also great write-up on keeping that 53 year old Z on the road. Lots of useful information there for all of us.

I suspect in the speedo itself. I have had mixed results cleaning them.

I bought some broken switches off eBay a while back, for parts. Now I can't find them 🥵 One of the problems with hoarding parts I guess. I'll keep looking for it as it likely had some nubbins and springs. They are in one of the crates/boxes, I know I did not sell any of that stuff. I'll wait to offer them until I have them in my had, lol

The wire colors changed over the years but the internal switch post positions and functions did not. This diagram is correct for all S30 headlight switch functions.

I don't think you can blame BAT for price hikes. We have the same issues in Australia with anything 90s JDM being $10k+ and needing extensive work. It's inflation, and supply/demand. I think Youtubers are more to blame, always documenting working on old 'sheds' that require loads of work, making it look easy to fix them up etc.. now a lot of that junk is coming back onto the market but nobody has any money to buy them and they just sit on the market for ages.

There's nuggets of gold in them thar nubbins........ Now what's the most cash advance you can get on your credit cards??? lol

Both.

This may help The R just means Resistor - used to reduce EM “noise”. good read on heat range and the why https://www.ngk.com/what-is-a-spark-plugs-heat-range-2

I've got a few spare combo switches in my storage. PM me and let's see what we can work out.

Apollo 13 fix... Top of a push pen, metal maybe? Edit: if it's those little buttons under the brass plates you wouldn't want metal. It's been a long time since I fixed my combo switch. Look in the green circle.

Yep to the right plugs or yep to it being pre-gapped to the right spec (or both haha)?

Yep 👍

so, these would be what I'm looking for? The -11 means that it is pre-gapped so I just pop them in, right?

Yes, 7s won't hurt I'm sure.

Not in Arizona, but a friend once sent his tach here: https://www.bobsspeedometer.com/

So if I'm understanding this right. When running leaner, it's better to use a BP5 plug since it will absorb cylinder heat better than a BP6?

IMHO, the internet as a whole killed off most of the "Stole it from a senior citizen" stories that we all used to hear about. In that regard, I think we've got a more fair system now, where anyone can look at a glance and see what prices are for most 2nd hand things, from cars to Lego sets, and everything in between. Of course, that's led to the market swinging the other way, where unseasoned sellers think that a sale of a top car makes their rusty hulk worth the same. I'd agree it's odd how much bidders have become accustomed to purchasing something sight-unseen. In my experience, there's really no such thing as "bidding with confidence" on a car that no one has put eyes on. Otherwise, the law of 10K is in effect - regardless of stated condition, any car purchased at auction will require a minimum of $10,000 of work in order to become the car you thought you were buying off the auction block.

Very cool!! Thanks for posting this chart. Answered a lot of questions?👍👍

Yah, that is about 15 miles south of me. I may take my truck and fill up 3-4 5 gallon jugs. May be fine. But ethanol really wreaks havok. Could have bought a bunch of gas for how much 3 new webers and a sonic cleaner cost, LOL