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I have the level 1 OBDII add-on from these people on my '98 Tahoe, it has definitely helped. So this: https://www.performancechiptuning.com/voltage-performance-chip-battery-module-raizin/ makes me wonder. I imagine it's basically holding the electrical system up to nominal from the get-go...

Yup, so would I. I can't come close to affording it though. There is a lot of interesting reports out there now. For example...

My '98 Tahoe has to sit a bit more than it's been used to, with fuel prices hiked a lot, so I put some of the most common fuel stabilizer I've seen here -- Sta-Bil: https://www.goldeagle.com/product/sta-bil-fuel-stabilizer/ in the tank with fresh gas. And I was surprised. It helped a lot...

Just realized that one of my happier yet very out-of-band habits hadn't made it here yet. For several years I have been adding one ounce of 2.5-micron HBN to oil changes in my '98 Chevrolet Tahoe. Usually I mix it with one of the quarts of oil. Definite improvement. Feathering the gas...

I've finally got Stage I of my rig to throw ionized air into the intake, in apparently stable condition, the gotchas seem to be under good control. So now I need to build Stage II :-) After trying a number of things, the simplest seems to be a switch to "detect" throttle position. Anyone have...

Speaking of temperature. I need to have my current very-special-electrical turn off when air temperature is lower than 20F (6.7C), and I had an uncheap waterproof snap-disc, but the only one I could find snapped at 14F, too low. So more recently I found the below. This is one of a series of...

Very nice filter, I've been running running it a little while now.

The biggest reason on vehicles I've worked on isn't airspeed -- it's temperature. A large proportion of aftermarket air intakes take general engine-compartment air into the engine, which is an awful idea in a Topeka, Kansas summer with outside ambient at 100F / 38C. I am told that a lot of...

And thanks for the PCV education :-) You sure put a lot of good info into that one sentence there, and I really do enjoy learning about own-built improvements over OEM any day of the week! I do like 1V to start, if you're going with a clip immediately. I have run K&N, but I should say, I do...

It was kind of fun, Ray, seeing those comments. But I'm very grateful for you and Waynne and others with uncrisped brains :) And indeed, I remember seeing that patent -- which expired in 2013 :) It's equally interesting to read the specifics of what is being patented: it's an "apparatus" with...

Hi, Ray! Indeed, those 70s ionizers I remember from the Popular Mechanics magazines my grandfather gave us :) I didn't have the motivation+funds to buy one until the late 90s, learned a bit. In the last 15 years or so there has been quite the explosion of negative ionizer units, often...

Will do. Good to see you back. To be very specific, I have ordered one of these: https://www.napaonline.com/accessories/afe-pro-dry-s-air-filter?set-vehicle=1 an aFe 11-10005, fits lots of trucks. aFe has a wide range, though I'll imagine there are vehicles they can't fit.

Yup. I think that I can go even cruder for now: a microswitch thrown by the accelerator lever. The NO2 folks seem to be doing a lot of that, and I think it fits the situation OK, because Stage 2 needs to turn on a bit off-idle.

Well, I've starting thinking again (that can be dangerous) about my charged-air project. It's very nice and stable now. So it's time to think about a next level. Probably a "secondary", turned on (optimally) when airflow rises in the filter compartment. I tried a couple very popular tach...

Found just one: https://afepower.com/afe-power-11-10005-magnum-flow-pro-dry-s-air-filter And it looks good, we'll see what happens. ETA a couple of weeks or so. Was tough to find. Eventually found it here: https://www.autoaccessoriesgarage.com AAG has been very responsive and easy to work...

I ran K&N for a while, and then my Mass Air Flow Sensor died and I had to replace it -- and there was this thin layer of red dust on its inside. Didn't like that at all. I've found a few makes of oil-less washable air filter, but none which seem to fit my stock air intake. Anyone got a...

Many thanks, Waynne!

It is altogether strange. I'll see if I can get a hirez super close up using my scanner soon (without scratching the platen hopefully). It really does look retracted / compacted (?!) and not worn. No strange marks anywhere. Very odd.

Just had my plugs changed, 1998 Chevrolet Tahoe, 5.7L V8. Am really curious what the wise ones among us might have to say. Most of the removed look like this (all of them AC-Delco 19256067 41-993, reportedly Chevy default recommend iridium for this vehicle): But one of them, is the below...

OK, @goldie . You did mention interesting fuels in the original post, so clearly you're game for more or less anything-goes. We'll want to make sure you have a very good engine block and innards and all, because even 3x is three times OEM rating! So maybe that comes first, high-end alloy...

That is wonderful, Waynne, thank you!!! I have a partner in the effort now, and I want to make sure he and I are on the page together, I will be in touch! I'll also send him this thread.

Appreciated :-) I can't stay away too long, y'all are too excellent. I'm almost ready to write up the final edition of the ionizer widget, I'll make sure it gets up here somewhere good.

Yup. Now almost a year later, still going strong. And after a few other minor issues (new plugs & wires plus a newly finalized negative ion air setup), it's running smoother and better than ever before. This is a 220,000+ mile (340,000+ km) engine, no rebuilds or remotely similar.

I have some electrical widgetry I'd like to switch on progressively, starting with off-idle status. Stage 1 is turned on at ignition, stage 2 is to be added at off-idle, then stage 2 gets turned off when back to idle. What's the simplest way to do this for the general automotive case?

Well! Another year. I had an inspiration: charge the filter. The filter on my Tahoe makes this easy, the filter material is held in place with a metal mesh. So I rigged up one new air charger component with a clip to the mesh. Engine behavior was immediate and startling; it was as if that...

Well well. Got it! A while ago I was googling and saw some blue washable filters which explicitly did not use oil; anyone know if this is a direction worth going or avoiding?

I was indeed using an oil-impregnated filter, red-colored oil, and I kept up the recharging. I have to wonder if the powder was actually dried oil.

A month or three ago I replaced the mass air-flow sensor on my '98 Tahoe. Improvement was clear. What shocked me, was the thin layer of red dust on one side of the mesh and on the fine wires in the middle. My air filter to that moment, was a certain common brand known for red color and...

Thanks! My mechanic found that although OEM for '98 was platinum, iridium is the current Chevy replacement; working well.

Thanks, that helps. I don't think I'm burning rich: nothing at all is visible coming out the tailpipe shortly after startup in current weather, and never anything except a bit of gray in any weather. I have been thinking about having sensors gone through. Two out of the three oxygen sensors...

My mechanic did a compression test on all cylinders, he gave a number I don't remember on #4, he said it was a little low but nothing particularly unexpected in a '98 with 237k (miles) or so on it.

We are using strictly Chevrolet-recommended plugs for this vehicle. OEM was platinum, replacement recommend now is iridium which was put in. Could have been one marginal plug I suppose. A different mechanic (known for spending my money) thought via engine sounds that there might be a crack in...

I was wrestling some major carbon buildup until recently, on my 1998 Tahoe, upon which a past owner bestowed free-flowing exhaust duals. I ended up replacing all plugs and wires, which helped for a while, but then carbon got plug #4. I replaced the K&N air filter with a standard one, and that...

I've been using this: https://carperformancechipreviews.com/gte-stage-1-performance-chip/ for about a month. Definitely seems to be delivering per above deep dive, advertisements, and reviews elsewhere. Noticeable fuel savings, noticeable engine behavior improvement, and it seems to keep the...

Interestingly enough, the original OEM plugs on this truck (1998 Chevy Tahoe) were platinum -- but the GM recommend now for replacement is iridium. My favorite engine guy is a stickler for OEM standards (when I let him), which does keep me out of a lot of trouble; we were both surprised :-)...

I'm about to replace the plugs, wires, cap, and rotor on my 1998 Chevrolet Tahoe. When I do searches in auto-parts store web sites with local stores, there is an incredible variety of plugs: platinum (stock, reportedly), double-platinum, iridium, "power nickel" (whatever that means). And when...

Oh my. Real major reengineering there. Certainly would love to have a Haltech ECU device for that sensor to plug into, but for me that cost is half a replacement vehicle :-) J.E.B.

And that's proof of the pudding :-) The only reason for losses using E85, is engines aren't being set up properly for it. I wonder if an Australian source might be best for replacement sensors...? :-)

I have been doing it for a couple of years now: https://enginefun.ponderworthy.com and I can provide (free of charge) a small number of the air charger units I'm using. If you're interested, please contact me privately, either via this site or email.

Around here, it's the higher octanes (which means 91, and sometimes 90 and 89) which are usually E10. E15 is relatively rare, but one chain has E15 as standard for 91, and that is also the only consumer fuel chain right here (Topeka, Kansas, USA) which is carrying E85. I've run lots of...