I have a donor V6 Fiero. What I would like to do is swap this motor into my iron duck equiped car. The biggest problem I have is the donor car is an auto and I would like to retain my 5spd. Will I need a different ECM and wiring harness ? Also is the radiator/fan assembly different ? What else will I need ?

And , one more thing , will the Izuzu tranni be OK with a V6 ? I plan on doing a 3.1L upgrade to the V6 adding a cam, headers, chip, etc. I want my car to do this

[This message has been edited by 2M4 Dale (edited 07-16-2000).]

Don't know anything about the 4cyl-to-V6 swap, but I can get you a good deal on some yellow "smiley face" wheel covers .

My personal opinion is that I'd want to stick with a Muncie 4-speed or Getrag, based upon the notion that GM wouldn't have specified a new transmission for V6 5-speed applications if they didn't have to. But, what do I know? I've never tried it.

I know that some other members have stated that the Isuzu works fine with the V6... there's nothing like experience to know what you're talking about. One Scott Barrett (sp?) claims (on his web site) to have used a V6-Isuzu Fiero for racing.

One thing's certain - if you do the swap, you'll have a learning experience, and a story to tell !

BTW - don't forget to change the fuel pump to the higher-pressure unit. Good Luck !

If you are swapping into an 84, you may have some wiring issues. I think the 85-88, the wiring harness is complete, you just have to know what to connect to what. You'll need an ecm for the engine and transmission you decide to use and swap out the auto flex plate with the proper clutch plate. I don't think it will be a weekend job.

Thats what I need...didn't know about the fuel pump. And I don't intend for this to be a weekend deal. I'm planning on doing it over the winter after I park my Fiero for the year.

Sounds like a pretty good combination. Quickest stock Fieros are the 1985-86 V6 with 4-speed Muncie, according to various sources including an earlier thread on this forum. And the 1987-88's have the bigger fuel tank, and the more reliable headlight system !

Dale,

I was speaking to the people at The Fiero Shop and they told me you will need the V-6 harness. Scott is planning to do this swap also, and I was getting information for him. Joe & Miriam will be at the Nationals. Look them up and I am sure they will go into more detail for you. And I will see you on the 12th.

Time to reveal a little ignorance here. Are the 4-cyl and V6 motor mounts in the same locations in the cradle? In other words, can Dale just buy V6 mounts and bolt them on, or is some sort of welding/cutting/drilling necessary?

Nobody seems to want my nice little Coupe, which leaves me considering paying Ed Parks to swap in a 3.4, or attempting a 2.8 swap myself.

Chad, I think I can answer that one. The mounts are the same on the bottom but the dogbone is different up top.

I would go with the izusu 5 speed. I have it in my 88 coupe V6 and I love it. I have been told it is smoother shifting then the getrag. look at this post. https://www.fiero.nl/forum/Forum2/HTML/002635.html

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Well, it's hard to argue with the voice(s) of experience! I happen to own a V6/Getrag and a 4-cyl/Isuzu, and love the way Getrag shifts. But in defense of the Isuzu, the biggest reason it's less fun to drive, is that it needs more mmmph -the engine's fault, not the tranny's.

Sounds like, if you go with the Isuzu, you'll have fewer linkage issues (such as shift/select cables and clutch slave); you know what the Isuzu acts like (since you are driving it now), and if the ratios are better-spaced than the Muncie, you might end up with a quicker car to boot!

Even if you eventually trash the Isuzu, you can dust off your Muncie, and put that in. Sounds like an easy decision to me!

Oh, and I almost forgot - the biggest headache, if you used the Muncie, would be you'd have to change the 5-speed shift pattern sticker on the console !

Sounds like a fun project - please keep us informed as you go .

[This message has been edited by StuGood (edited 07-17-2000).]

I will keep you all informed on this project because I'm sure I'm gonna need a lot of help along the way. I think that I'm gonna try and stick with the Isuzu, by the way. Anyone want to trade a V6-5spd ECM for a V6-auto ECM ?

2M4 Dale, you can look at my website to help you some if you want. I have done the swap you are wanting to do and made a meger attempt at a website for people just like you.

http://msnhomepages.talkcity.com/RallyRd/scca_fiero/4cylindertoV6.html
Click that and remember... no laughing at my website

Thanks SCCA. Whats to laugh about ? I think it's a great website...

You will need the ECM and the wiring harness from the ECM and back from the donor car. I've just done a V6 swap on my -85 2m4 SE but I also swapped the transmission to a 5sp Getrag.