Besides moving the starter over, is there any other problems or extra steps to getting a rear wheel drive 3.1 (out of a 91 Camaro) to fit into a Fiero?

This is for my daily driver, I'm building a 88 GT with t-tops, powered by a 3800 SC for fun days

not that i know of. i think that may be the only issue?

what year is the 3.1 going into? Pre 88 will need the flywheel/flexplate from an 88... Are you doing a short or long block swap?

It has been years since I did one, but I remember it was just like doing a 3.4 swap.
So check over the standard 3.4 swap stuff, link in my sig for 3.4 info.

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"DRIVE IT LIKE A FIERO"
'84 Fiero, engine to be determined
'87Blue GT 3.4L Swap Completed!!!!!!!! Boosted!!!!!!!
^^^^ Now in the Construction Zone^^^^
Las Vegas Fiero Club Parts/Sales/Service/Club
Fiero Road Club Of Northern Nevada

Its a short block I guess, its not long. It's going in my 87, which had a 2.8 previously. Why would I need a flywheel from an 88?

quote Originally posted by stewart_1322: Its a short block I guess, its not long. It's going in my 87, which had a 2.8 previously. Why would I need a flywheel from an 88?

The 3.1's use a naturally balanced flywheel or flexplate. Only the 88 2.8 fiero's used a naturaly balanced flywheel/flexplate. The previous year Fiero's use an externally balanced flywheel/flexplate...

Short block is very straight forward. Do the mod to your block (also check w/ the 3.4 pushrod guys to make sure) for the starter and use an 88 flywheel & your good to go... Your also going to want to keep the 3.1 harmonic balancer; it to is ballanced different then pre 88 fiero's...

The 3.4 is internally balanced and needs a neutrally balanced flywheel/flexplate and it sounds like the 3.1 is the same way. The 88 had an internally balanced engine so it is easiest to buy one for them.

The ac bracket needs to be tapped and the ECM needs a chip and it's good to go. I stuffed a cam in mine while it was out, but that's just me.

quote Originally posted by ckrummy: and the ECM needs a chip

Are you sure about this?

I stroked my 2.8 to a 3.1 (which is basically the same thing) and I am running the stock ECM... Thought you only needed the ECM if it were a long block swap (3.1 intake and sensors)??

So why is it that a externally balanced flywheel can not be used?

Because the engine will vibrate like crazy.

quote Originally posted by ALJR: Are you sure about this? I stroked my 2.8 to a 3.1 (which is basically the same thing) and I am running the stock ECM... Thought you only needed the ECM if it were a long block swap (3.1 intake and sensors)??

It might have been because i also put in a cam but my car didn't run right until i got the chip, stalled, lacked power, stuttered, rough idle and it topped out 87mph, good thing to, i forgot and left my flux capacitor on

I've got an S10 with a stroked 2.8(3.1) with a Lumina stock 3.1 ECM.

A few posts back it mentioned that 88 and pre 88 Fiero harmonic balancers were different due to balance. I thought there was a thread here some time back stating that they were the same. Can anybody confirm?

quote Originally posted by ckrummy: It might have been because i also put in a cam but my car didn't run right until i got the chip, stalled, lacked power, stuttered, rough idle and it topped out 87mph, good thing to, i forgot and left my flux capacitor on

I also installed a cam (272) in my stroker 3.1 as well as every other concevable <sp? performance mod...

Well it getting a OEM cam, so no worries there.

I'm still not understanding why you cant use the 2.8 flywheel if its essentially the same engine.

If you look at a pre 88 flexplate you will see a weight welded onto it. This is to balance it because the internals are not balanced. On the 88 you will not see a weight because the balancing is internal to the engine. It should be obvious that the flexplate will be out of balance and vibrate if you use the one with a weight welded on it.

So the 3.1 is an internally balanced engine then?