quote Originally posted by armos: V6 and 4cyl use the same MAP sensor, unless there's some modification I'm not aware of. Since both engines are NA, they have the same range of pressures to report and the same 8-bit resolution. If you upgrade to say a 2bar MAP sensor, you'd just be losing half the resolution to support a wider pressure range that the MAP will never see.

That's a really good point that I'd not considered!

quote Originally posted by armos: I know you've talked about aftermarket ECMs but I don't remember if you're actually using one here. If so, then maybe there is something better that your ECM can use.

Well, there's two Fieros. The one I'm more or less referencing here is my daughter's 85 Fiero 2m4 SE. No real point (in my mind) for her to swap out the ECM. Her engine is basically stock. With the exception of a .040 overbore (it had over 200k miles on the engine), the engine is basically totally stock. The only other thing we've done to it is upgrade the A/C compressor, convert it to a serpentine belt, installed a harmonic balancer, installed an 88 exhaust manifold, and installed a decoupler pulley with the C130 alternator. Everything else is stock (though with totally new stock parts). I maybe did a little bit of port-matching, and the head was planed... so maybe a bit more compression. So, I'm expecting my daughter's car will get at least the 92hp, but possibly 95hp... haha.

Anyway, the stock ECM is absolutely perfect for what it does, no point in swapping it out. I'm doing a 3.4 rebuild for my Fiero, which is an 87 SE/V6, and I'm thinking about using the EZ EFI 2.0 (which I've already purchased). I also have the MSD 6EFI controller, and some other stuff too. But we'll see.... I haven't started on any of that, that car is still in storage.

quote Originally posted by armos: My 86 Grand Am 2.5L, and another my sister used to have both had the "Tech-4" badging on the air cleaner. My 84 Fiero did not. I've never seen the air cleaner on other years of the 4cyl Fiero, so I don't know when Fieros started to use that badge. I've seen an ad on youtube for a 1985 S-10 with the "Tech-4" engine, so at least Chevy was throwing the name out there that early. Doesn't mean they were badging it on the air cleaner yet, though. I can't find it on youtube anymore, I downloaded it ages ago. I did find this video of an actual 1985 S10 2.5L - and it does not have the "Tech-4" badge. https://www.youtube.com/watch?v=XBEZP0_erns

Yeah, I swore up and down I'd seen the 4-TECH sticker on 85+ Fieros, but as it turns out, the only Fieros that ever got that sticker was the 1987-1988 Fieros because of the newer TBI unit and DIS ignition. The only innovation my daughter's 1985 Iron Duke has over what came in the 1984s, is that it has a roller lifter camshaft. The 84s were flat-tappet. It seems most early 85s also got the flat-tappet, so the roller lifter upgrade seemed to be an almost mid-year improvement. Didn't really improve horsepower, but it did improve the sound of the motor.

quote Originally posted by armos: There's certainly a market for emissions stickers - CA requires one to pass an emissions test - so there's probably somewhere you can buy them. If not, then maybe this image is enough to be able to make one. <came from a late 84 with 49-state emissions> If you do that then maybe somebody can post a picture of the 85 sticker just to make sure the details are right.

Her sticker is still decent, but the underside of the decklid is trashed... the fiberglass "frame" apparently broke at some point, and there's a bunch of ghetto stuff that's been done to it. I've never worked with fiberglass, but I saw my uncle restoring his 69 Corvette many years ago, so I have a pretty good idea. I'm probably going to try to repair it and sand it down so it looks stock. All the bolt holes and everything are ok, it's just cracked as hell. So when I repair it, I'll have to paint it, and thus I'll need a new sticker, haha...

Way too much attention and effort for a 4 cyl Fiero... but she loves this car.


I can try to make one, I really just use a combination of MS Paint, Photoshop, and Movavi Photo Editor. And then I used something called Sticker Mule. Biggest issue I see is whether or not the vinyl stickers can handle the heat of the engine bay.

[This message has been edited by 82-T/A [At Work] (edited 08-12-2024).]

LOL... I know, no one has to say it... this is a bit "obsessive" ... but the stickers came in... haha...







And this is what the original looked like (rather trashed):




I found at least 4 other Fiero air cleaners that had this exact same sticker, so I knew it wasn't just something that a single dealer put on. All the part numbers reference actual Fiero replacement filters/parts. Note, I made the sticker about 1/4" bigger horizontally and vertically.

[This message has been edited by 82-T/A [At Work] (edited 08-23-2024).]

quote Originally posted by armos: There's certainly a market for emissions stickers - CA requires one to pass an emissions test - so there's probably somewhere you can buy them. If not, then maybe this image is enough to be able to make one. <came from a late 84 with 49-state emissions> If you do that then maybe somebody can post a picture of the 85 sticker just to make sure the details are right.

I havew been making Fiero Reproduction stickers for about 10 years now. I have all of the stock Fiero stickers for the most part.

82-T/A [At Work] was kind enough to send me the excess of the 2.5 air canister/filter housing stickers. This is one sticker I was unaware of, thus didnt have it. I will be including it in future 2.5 sticker sets. I will not be selling them, as he was kind enough to send them to me for free.

There is a thread in the Mall where I sell the stickers here.

If you are interested in purchasing stickers, head over to www.FieroDecals.com

[This message has been edited by JohnWPB (edited 09-20-2024).]