The obvious would be the 2.5I4, 2.8V6, 3.1V6, 3.4V6, 3.8V6, 4.5V8, 4.9V8 GM motors but what others are there? Are the quad 4's a direct fit? Does anyone have a complete listing with flywheel requirements etc? Import engines? Just curious, don't see a swap anytime soon in my cars future but would just like to know the possbilities!
Come on guys, I know one of you has a list out there somewhere!

I'd definatly like to know what kinda "non-gm" engines will fit

You forgot about the Northstar, that'll bolt up to the tranny.

Quad 4's are not, completly different bellhousing pattern.

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1988 Quad 4 Coupe 5 speed
More pics of the coupe
1986 GT 5 speed, 1984 SC Auto
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What about the gen 2 3100 from the mid nineties Berretas (<--I have spelling issues)??

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Check out my website...
www.localline.com/~dlcrim
1985 Sport Coupe
1988 Formula

any frontdriver gm unit can and has been used in a fiero some are simple[60 degv6] others are harder
Q4 requires the trans to come with the motor
4.3 3.8T wants a chevy V8 type plate adpter

unknowns that should fit include saabs and isuzu motors, we got their trans plus they used 2.8v6 in trucks that now use a sweet 3.5 al alloy dohc v6 rated at 240hp that may be the old v6 2.8 pattern
along with saturns nobody has tryed them yet

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Question wonder and be wierd
are you kind?

quote Originally posted by ray b: any frontdriver gm unit can and has been used in a fiero some are simple[60 degv6] others are harder Q4 requires the trans to come with the motor 4.3 3.8T wants a chevy V8 type plate adpter unknowns that should fit include saabs and isuzu motors, we got their trans plus they used 2.8v6 in trucks that now use a sweet 3.5 al alloy dohc v6 rated at 240hp that may be the old v6 2.8 pattern along with saturns nobody has tryed them yet

Only qualifies for the list if it will bolt directly to the stock fiero transaxle, the Isuzu would seem to be a natural if they still use the same bolt pattern. Anyone found a wrecked or abandoned WRX turbo yet to experiment with!LOL Seriously, seems like a compiled list of direct bolt ons, with maybe only flywheel issues, would be tremendously useful to the community.

The reason nobody knows about those oddball engines is that nobody's used them. Do you want to be the first?

Not that you would want to use it, but the Jeep 2.5L four engine will bolt to the Fiero tranny pattern. The GM 2.8L engine was an option on the late 80's Jeeps.

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87GT 3.4 Turbo Best 0-60 5.2 seconds
http://turbofiero.fierojoe.com/turbo.htm

quote Originally posted by Dennis LaGrua:Not that you would want to use it, but the Jeep 2.5L four engine will bolt to the Fiero tranny pattern. The GM 2.8L engine was an option on the late 80's Jeeps.

Does that mean the 4.0 L straight six will fit?

quote Originally posted by Steve Normington: Does that mean the 4.0 L straight six will fit?

you could tow a house with a setup like that!

quote Originally posted by Steve Normington: Does that mean the 4.0 L straight six will fit?

Since I used to be a Jeep guy, the answer is a defonate no. The 4.0 use the old AMC bolt pattern and I am pretty sure the 2.5 does also (since it was basically a 258 I-6 with two cylenders lopped off then reworked quite abit). Incidentally the 4.0 is not realy a reworked 258 (4.2L) but was accually derived from the 2.5 Jeep 4. Sort of an illigitimate indirect decendent of the 258.

Back on toppic I don't think any Isuzu cars use the same patern. They are more likely the same as the 2.0l OHC used in Sunbirds. I've never realy gotten a look at any of their truck engins.

What about the 3100 2nd Generation from the mid 90's Barettas? Will they bolt up? I know people have used them so someone should have an answer.

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Check out my website...
www.localline.com/~dlcrim
1985 Sport Coupe
1988 Formula

Ya can't forget about the 3300 Buick.

I am not sure but I thought the 2.0 Sunbird mototr did share the same bolt pattern but had the starter on the worng side of the motor.

sunbird 2.0 turbos can fit in a fiero
they were a dealer option
called an andretti!! rare but done

but no way is any strait 6 going to fit
NO ROOM

WRX turbo is a subaru not an isuzu

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Question wonder and be wierd
are you kind?

quote Originally posted by Coupe85: What about the 3100 2nd Generation from the mid 90's Barettas? Will they bolt up? I know people have used them so someone should have an answer.

Yes. They are the same block as the 2.8 with a stroked crank and aluminum heads. Note: 3100 was the switch from MFI to SFI, not the switch from iron to aluminum heads. The problem with the 3100 is that the aluminum heads mean you have to use the donor intake which means you have to use DIS (no room for the distributor). Which means you need the donor car wiring and ECM. Also, the bolt patterns for the brackets on the side of the head (alternator, dogbone, and compressor) are not the same as the Fiero. A couple of people have this engine (001E for one) and I'm working on a 3400 pushrod swap.

Not trying to be anal but the 3100 is a gen 3 motor

Ok, thanks for the info. I was told that it was a Gen. 2. Thanks for the correction.

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Check out my website...
www.localline.com/~dlcrim
1985 Sport Coupe
1988 Formula

Has anybody had any experience putting in an (Heaven forbid!) import engine?
I seem to recall someone on this board working on a 4g63 (DSM engine) swap... any ideas on progress? It'd totally open up the floodgates on aftermarket parts

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- 2.8v6, 5spd
- no cat, msd ignition/coil, K&N

Okay, so far I will take the response to this thread to mean that there is no existing LIST so to speak. In answer to one of the questions I will assume was directed to me, no I wasn't planning on being the first to try a non GM motor, just interested in the possibilities! If you can swap a GM motor and ECM in then why not any other manufacturer. If I found a relatively inexpensive import motor that offered plenty of HP and torque that would bolt up directly to my transaxle then why not go for it! America is a mix of people and ideas from other countries, I certainly don't think that by using another powerplant that my car would no longer be American. The real strength of the Fiero is in it's handling and visual appeal. Power has always been the missing piece to complete the vehicle. Plus I just thought it would be nice to have a list of available engines that would bolt directly to the stock transaxle! Forgive me, I ramble.

quote Originally posted by DRA: If you can swap a GM motor and ECM in then why not any other manufacturer. If I found a relatively inexpensive import motor that offered plenty of HP and torque that would bolt up directly to my transaxle then why not go for it! America is a mix of people and ideas from other countries,

There are a LOAD of reasons why it's harder to swap in other manufacturers' engines than GM engines. "Ideas from other countries" include radically different bolt patterns. There's no standardization committee, no one forces compatibility across manufacturers beyond adherence to OBDII.

Oh yeah... "The List" is basically 90% of engines GM has used in FWD applications.

If your swapping the whole engine and ECM, ECU, whatever you want to call it, then where is the compatibility issue? I asked for engines that have the same bolt pattern, if there are none beyond the GM choices then fine, I was just wondering if there were any and if so what they were. Don't talk to me about standardization committees, I'm in the computer field and even when there are such committees there still seem to be major issues LOL! God, now I know why they say curiousity killed the cat. Would that list contain the pre 70's 4cyl's, quad 4's, Olds Tornado was FWD (last time I checked Olds was GM), 4.3 V6's, just curious where the 90% comes from. Don't want this to turn into an import VS domestic thing. Was just curious.

I should have said "transverse FWD", because the Toronado is longitudinal, and has the BOP bolt pattern anyway.

For a long time there were only a couple of bolt patterns in GM: BOP (Buick-Olds-Pontiac) and Chevy. The longitudinal Buick Olds and Pontiac engines use the BOP pattern: Poncho V8's, Buick 215, Buick V6 (that's why GN swaps are hard), Oldsmobile Rocket V8's, Nailheads, etc.
Chevy (and I think Cadillac, but I'm not sure) used the Chevy bolt pattern.

Then when GM went to transverse FWD, they introduced a new bolt pattern. Because FWD is a packaging measure, and early GM FWD engines were anemic anyway, this new pattern was much smaller than the traditional ones. This is the pattern that Fieros use, and it's the reason Fiero clutches are limited to 9 11/16" diameter.

So older engines require an adapter plate to work with a transverse transaxle.

There were some transverse Buick V6's in the '80's but as far as I'm concerned they're not good swap material; they're just not powerful enough to be worth the trouble.

The 4.3 V6 has never to my knowledge been used in FWD or transverse applications. There was a 4.1 Buick engine, but it falls into the same category as the other '80's Buick V6's

Other things that won't swap in are Quad 4's and Brazilian OHC engines (Sunbird turbos, for instance), but these engines come with their own transaxles and are GM, so swapping them shouldn't be too hard, although the Brazilian engines are still not really worth it considering what else is out there.

The problem with swapping in other manufacturers' powertrains is that the way the ECM talks to the rest of the car is different. I had enough problems getting my Northstar to work right, and it's still GM, just 8 years newer than my car. Also, with other manufacturers powertrains mounting schemes are totally different, custom axles wll have to be made, shift linkage sorted out... the usual issues with a GM-GM swap, plus several more on top of that.

I'll try to make this clear one last time, just engines that will bolt to the STOCK fiero transaxle. I don't see how you would have halfshaft issues and major mounting issues if your not changing the transaxle itself. Thanks for the response's so far, I guess as far as non GM stuff there hasn't really been any research done.

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[This message has been edited by Tweek (edited 12-11-2002).]