turbo fiero?

[ericjon262]

Lately I'd been toying with the idea of EBAY turbocharging my 1985 fiero. it's a stock 2.8 that's about to receive a 4 speed manual trans. my question is, would it be worth it to turbo a stock 2.8? what size turbo should I use if I do it? I'm gonna do it on the cheap if I even do it. also, would an '85 2.8 have a roller cam? what about an '87?

Thanks in advance-

Eric

[robertisaar]

the 2.8 in a fiero is a gen 1 motor: meaning no roller cams.

[ericjon262]

10-4, that means plan B, or C B, do nothing with the cam, C throw a flatty in the motor I'm getting,

[2.8-350TBI]

GEN1 = PITA
But it is workable.
Instead of turbocharging, get a 3400 top end (luckily I have one for sale, pm me if youre interested), and swap that in place.
It will save your engine the hardship of boost, will breathe more than that 2.8 will ever need to, and be more drivable, and more efficient.

As for a cam, a "flatty" is your only option, and I would recommend it. You can talk to forcedfirebird about that, and im pretty sure hes willing to chime in on this.

When I showed up to this forum I had the same question you did.
Turbo my 2.8? The guys here oriented me, and now I will be doing a 3.4/3500 buildup sometime not too far.

All that can be done for cheaper than what it would cost you to turbo that motor.

Iron heads really flow like crap, so it is better to start off with a better suited platform, and then turbo from there if you still need more oomph.

Hope this helps

[ericjon262]

well, the idea right now, is to turbo it for fun, and then when the engine kicks it, I'll swap to a 3500.

[ericjon262]

are all 60* sixes one piece rear main seal? and is there a different flywheel/clutch between a 2.8 and a 3500?

[Driver_10]

the clutch/ flywheel are interchangable between the 3500 and the fiero 2.8l. You wont have any issues there.

[TiredGXP]

the clutch/ flywheel are interchangable between the 3500 and the fiero 2.8l. You wont have any issues there.

Don't think so. In '85 the 2.8 was an externally balanced engine. 3500 is internally balanced. You have to use the flywheel from an 87 or earlier engine.

[ericjon262]

Don't think so. In '85 the 2.8 was an externally balanced engine. 3500 is internally balanced. You have to use the flywheel from an 87 or earlier engine.

'85 is earlier than '87, you mean later? also, what about rear main seals? one or 2 piece on an '85? or did all 60* sixes get a oprms

[Driver_10]

Don't think so. In '85 the 2.8 was an externally balanced engine. 3500 is internally balanced. You have to use the flywheel from an 87 or earlier engine.

My bad. I naturally assumed that he had an 87 style 2.8l. Speaking of which, Id reccomend using a Fidanza aluminum fiero/ s-10 flywheel with a 93-95 3.4l camaro clutch and pressure-plate.

[TiredGXP]

It was a two piece rear main seal in 85. Not sure when this changed - by 90 the Gen II engine was running a one piece seal.

[ericjon262]

does the flywheel bolt pattern change between oprms and tprms?

[ericjon262]

well, It may not matter, I pulled the intake on my 2.8 to swap injectors, and it was full of crap (oily sludge that wreaked of gas), and honestly, I think I'm just done with this POS 2.8, 3500 here I come, any recommendations on what model car to get one from? I've already got a '7730 ecm, so now what else will I need to complete the swap? will a fiero spec 4 speed manual bolt up to it? any need to know info?

TIA-

Eric

[2.8-350TBI]

well, It may not matter, I pulled the intake on my 2.8 to swap injectors, and it was full of crap (oily sludge that wreaked of gas), and honestly, I think I'm just done with this POS 2.8, 3500 here I come, any recommendations on what model car to get one from? I've already got a '7730 ecm, so now what else will I need to complete the swap? will a fiero spec 4 speed manual bolt up to it? any need to know info?

TIA-

Eric

Youre on the right track with a '7730.
BUT, if I were you, I would not use the 4 speed as it may very well grenade with the 3500's power going through it...

Look for a (284?) 5-speed and it should hold up reasonably well. You will need a neutral balance flywheel for it.

As for what car, just make sure it is an LX9 3500 and not the vvt version

[robertisaar]

the 3500 you'll be looking for were most commonly found in 04-05 malibus.

it does have the same bellhousing pattern as your fiero trans.