Anyone ever done a 4A-GZE swap on a Fiero? (Page 1/3)
stapler8 OCT 24, 03:11 PM
Been looking at options for I4 swaps other than the quad 4. The 4A-GZE makes 168HP out of a 1.6 supercharged 4-pot, which is some serious get-up and go. Might blur the line between the Fiero and MR2 though.

They've got twincharger kits for it as well, you'd more than likely be pulling some serious 1/4 mile times.

What's everyone's thoughts? Doable? Frankly I'm not sure if the motor was mounted longitudinally or not in the MR2, so the swap might be impossible expensive and time-consuming for what it is.
olejoedad OCT 25, 08:15 AM
Thats a lot of work for a couple hundred horsepower....
What kind of torque does the engine make?
wftb OCT 25, 08:33 AM
You have to look at the cost involved too. Popular japanese engines are scarce and usually more money as a result. I paid 350.00 for a D16Z6 honda engine for my 91 civic wagon and it had to be rebuilt. For the same 350.00 I got a 2.2 ecotec with 40,000 Km on it that was like new. Both were from auto wreckers.

Almost anything can be made to work in a Fiero but it all depends on your fabricating skills and the kind of shop you have. And time available to do it.
AsaBergman OCT 25, 10:04 AM
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[This message has been edited by AsaBergman (edited 10-29-2019).]

stapler8 OCT 25, 10:30 AM
Looking for a high revving 4 cylinder that has decent power. Figured import engines were probably the way to go with that, but I don't know modern GM so well.
wftb OCT 26, 01:19 PM
With a little bit of tuning(like raise the redline with HP tuners), even a stock Ecotec 2.2 will rev to 7000 rpm . The F23 5 speed that came with them fits stock Fiero manual transmission axles. There are kits available to mount the ecotec in a Fiero, but if you have the tools and skill you don't need a kit. You can get an LSJ supercharged 2.0 but they are old now so good luck finding a low miler at a decent price. The turbo ecotec 2.0 is a newer motor so more low milers are available and they have become GM's universal motor, they put them in everything. But the axles on the newer F35 transmissions that they come with do not fit Fiero hubs, so to do a swap with the turbo motor you need to get an older F35 from the supercharged Cobalt SS, an F23 that was hooked to a cavalier or sunfire 2.2 ecotec or an F40 with axles from a Cobalt SS LSJ. It is all doable but there are not a lot of us that have done it, mostly because the electronics scares people away. An older motor like the 3800 SC is just easier to do, engine management wise.

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86 GT built 2.2 ecotec turbo
rear SLA suspension
QA1 coilovers on tube arms

[This message has been edited by wftb (edited 10-26-2019).]

pHoOl OCT 26, 03:59 PM
wftb, on the electronics front... this may be an ignorant question but would running something like a Megasquirt make it easier, or less involved from a wiring perspective? I think the argument I've heard against that in the past was cost, though if I had to pay somebody for the swap, or to make the wiring at the very least, I suspect it could get into a matter of cost of shop time vs product purchase cost.

And like wftb said, they're starting to put the 2.0 turbo into everything, so hopefully there would be a decent supply of them with lower miles. Also, does anybody know if the newer 2.0 ecotecs share mounting locations and/or other dimensions with the older ones like the l61, LSJ, LNF? I believe they've gone to a can instead of cartridge oil filter, but that's about as far as I've looked.
wftb OCT 26, 06:38 PM
The wiring is easy if you don't mind having an instrument cluster from the donor car installed in your Fiero dashboard. I have the entire wiring harness from a 2004 cavalier in my car. The only parts of it that connects to the Fiero wiring is one wire that goes from the start key switch, one wire from a keyed spare on the Fiero fuse block and the cavalier connections to the battery. The Fiero ECM is not even in the car.

Some day I am going to strip another wiring harness out of a cav or sunfire because I missed my chance to have cruise and a few other things working.I stripped too much off the harness without thinking what I was throwing away.

Megasquirt works, a member here used to sell pre programmed MS systems with a wiring harness. I have one in the basement, never took it out of the box. Some day it will go in another project, non Fiero.

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86 GT built 2.2 ecotec turbo
rear SLA suspension
QA1 coilovers on tube arms

Raydar OCT 27, 09:08 AM
Another option is the N/A 2.4 Ecotec. Made 179(?) HP, even without DI.
It's the same engine used in the Polaris Slingshot, so there is some aftermarket.
Quad GT OCT 28, 02:24 AM
Love the Quad 4 16 V
Have had one for over 15 years
Where about you at?