Since the fiero has bigger valve covers do the heads ove bigger rockers as well??? Do the heads flow more then a 3.1 head or are they the same? And did they make 3.1 fierros i could of sworn i heard they did becasue i belive i saw one in the yeard all the ones i have herd of said 2.8 on the intake manafold but the one i saw the other day jsut said fierro on it.

 

Fieros only had the 2.8 in the V6 version. If you saw one, it was either misbadging or a swap. The Fiero stopped production before the 3.1 was introduced.

Last Fiero made was the '88. (in the US, Canada last Fiero available was the '87, I have been told)
Introduction of the 3.1, was in '89 in the 6000 and Pontiac TGP/STE, which was also turbocharged, again in the states only.

The Fiero Rockers are still only the 1.5:1, but those valve covers are nice, aren't they?

The Fiero uses the HO head, which IIRC the '86 and up Camaro also does.

 

The head swap will do not good. If you have a 87 'up camaro/firebird, then it is pointless, as you aleady have the same heads...

 

The 87+ heads are different than 85-86?

 

The 86-down are the small valve I beleive.
The 87-up are the big valve.
The fiero only have the HIPo big valve head.

 

maybe omeone's got an answer for this, but i had alwayz been wondering, why is it that the 85's came with 5 more lbs of torque than any other year 2.8L, can't be something w/ the heads, what in gods name is it with, and what changed between the years to make the difference.

 

I think it is the cam that's different for the 85 model

 

Iron head change was in 84/85. The '84 carbed 2.8 HO heads are the SAME as the MPFI heads.

 

No Fiero ever said '2.8' on the intake, they all have an application specific intake with either a Fiero decal or Fiero engraved in the plenum, it varies by year.

There isn't a single part on a 2.8 Fiero that is better than a 2.8 or 3.1 Fbody. If anything it's the other way around.

 

Dunno Drew, the valve covers are better, still that's just for P-envy.

The internals are identiacal as far as year by year application, so......................................... not worth the effort unless you plan on just getting a set of heads to port out.

 

I read somewere that fieros would run mid to high 15's stock is that accurte? Several years ago i had a chance to buy one but didnt think about i i thoght it had a ugly body style. I do how ever like the later model the GT version those look sweet.

 

yeah low 16-HIGH 15

 

good you mentioned the difference in body styles....while the earlier versions of the fiero, (the uglier ones) w/ 2.8L's could run those faster times , as the cars went on (and became better looking) they also gained a little pudge, so from what i've been told the later fieros can weigh in around 3k which isn't to far off from our little f-bodies, sux to ruin good things eh?

 

I dont beleive 3k. More around 22-2500 pounds would be fair for a heavy newer V6 version AKA cooler looking fiero. As far as running quicker you do have to take in account the weight difference and the fact they have less power loss due to thier powertrain configuration, better traction due to the engine being in the back keeping the wheels planted. Still there POS cars especially if you have to touch the engine.
Had the opertunity to buy a fairly nice 87 V6 Fierro was sitting next to my firebird in the lot $600 more. I stand by my choice.

 

But they are great if you can get a deal on a super charged series 2!

 

Yea those are cool. What was that movie that Charlie Sheen was in way back when? Oh Yea the Wraith. Wasent a Fierro But GM should ahve made a car like that.

 

We threw a 88 Fiero Coupe with C&C Ttops on the scale... It weighed in at 2800lbs. That's a 2.5L 4cyl with a notchback, no power options, etc... A fully loaded 86.5-88 GT with its fastback, power windows, locks, mirrors, factory sub, etc is going to tip the scales at near 3200lbs. For reference, I weighed my Iroc, Formula, Firebird, and a buddies Firebird, they all pulled around the 3500lb mark.

Fiero's hook better and the fuel injection is slightly removed from anything on a thirdgen, but unless they're modified they're fairly slow. The fast ones are the 85 SE's with the base Fiero body, the 2.8FI and a 4spd muncie transmission. The later Fiero's used a 5-spd that killed more performance.

 

They used the four speed through 86.5 and while I don`t know the quarter time I do know I smoked a 91 rs with a 305tbi on the street from a dead stop all thanks to the fact my fiero would hook like no ones buisness.

 

A few years bac in hotrod they had a artcle about someone who swapped a v8 northstar motor into the fiero. i think it ran like 13's

 

I have seen a 427 W/Big detroit roots, could not get traction for anything, ran low 13's, but was spinning halfway down the track...

 

so now wait if you have a non-ho 2.8 the heads would help though wouldn't they?

 

try reading the thread...

it has been said that if your car is after 85? it has the fiero type head(big valve) if you are so concerned about it, look up the info at a parts store. 1.60 Ex is the big head version.

If you look up your car there, and it says that fro the exhaust valve replacement, your good.

 

sorry thought I had put it was an 84.

Does anybody know if the valves can be opened any bigger then one in the fiero/ho heads?

 

now i really want a fiero sorry its not 3rd gen related but you gotta read this tech article and see the pictures.

http://www.v8archie.com/v8install.htm

 

V8 archie is a hack. Research it a bit, it sounds good on paper, but when you gain some first hand knowledge of the V8 archie conversion it starts to show its weaknesses.

Do you know anyone that recommends supporting a car with cement blocks rather than jackstands? V8 archie does.

 

All f-body 2.8 and 3.1 60*v6 version heads have 1.6"intake and 1.3" exhaust valves- ALL of them.

The 3.4 heads are the "HO Version" and has a 1.72 intake and a 1.42" exhaust valve.

 

not true when i pulled my 90 apart it had 1.72 valve H.O. heads

 

Factory? Greg, are you the original owner, or could they have been swapped previously maybe?

 

Valve swaping is big in other worlds. i hear tales of trick Buicks with a dodge intake valve and a ford exhaust valve. Long as they can cut them in, grind down the length, you can get real creative.

Matt

 

no, ALL fuel injected Iron Head models came with 1.72 intake and 1.42 exhaust, along with the H.O version (the last year of the carb, before they switched to FI in F-Bodies.)

I know for a fact the valves on my 89 2.8 are 1.72 and 1.42 because my heads are being ported by my freind who works at a machine shop, and he measured them before we started any work on them at all.

 

Drop on over to www.fiero.nl for more Fiero info. We have Fieros over there running 11s with 3800SC motors. Other common swaps are 3.1, 3.4, 3.4 DOHC, Cadillac Northstar V8s, 4.9 Cadillac V8 and the ever popular Small Block Chev. All this in a package that can still out handle a lot of new cars on the road.

 

your scales must have been way off. 3200lbs is even over the max weight rating the car can handle. a base 4 banger should weigh around 2,600lbs, probably a little more for an 88. My 87 loaded GT weights about 2,750

the 5-spd tranny is geared better than the 85 4spd and is an all around better tranny for performance. with the 84 4-cyls 4 speed muncie was 4:10 and swapped into v6 cars can give great ecceleration but obviously top out quicker.

owner of an 85 2M4 base coupe and an 87 Fastback GT

 

...

 

Dude your car is nice. It make me miss my GT but everything I have ever read on a fiero says the 4-speed is the better tranny both for durability and gearing the only advantge of the five speed is the overdrive.

 

well the 4 speed was available in 3 ratios, 4:10 (only 4-bangers), 3:32 and you could get 3:65 also. The 5 speed getrag is 3:61 so the higher 4 speed is barely anymore. Lot of guys use the 5 speed with SBC swaps and 3800s/c swaps

 

My understanding was the gearing of tranny on the four speed complimented the 2.8 better than the five speed but I have been wrong before.

 

we've got a fierro guy on here! cool. hey, do you know where i might be able to sell a 2.8 FWD block with a fresh +.030" bore? i've been wanting to sell this block, and crank, but haven't been able to find a good place to list it.

 

I think this is one very happy V8 Archie owner. http://www.fiero.nl/forum/Forum2/HTML/025173.html

And besides, who here hasn't used cinder blocks to hold there car up at one time or another. I know I have. (I don't anymore)

 

ive never done that.


but then again, ive known better since i was 5 or so.





anyhoo, my mom has a fiero.... we had all the stuff to do a northstar conversion, new engine cradle and all, but once i moved out of the state, noone else wanted to start the project... evertually they sold the motor and stuff..

my only complaint with the fiero right now is the shifter and clutch.... they dont feel connected that well *shrug*

not my car though........

 

You know the problem with the cinder block thing is people do it wrong. They are designed to take loads in only 1 position, but people like using the flat sides. Which will carry loads but has no lateral support.

Set down the right way with a bord to make them flat, they have great load carrying capacity and lateral support.

I have used hunks of tree before though. Good 18-20in round pieces a foot or two thick.

Buddy just got an early model 4 cyl fiero, needs a clutch slave cylinder.

not stolen but it has no title or keys. Have no idea what to do with it. Had to peal it to tow it 5 houses down.

 

Doward here:

Fiero's are pretty cool.. I'd love to have a '87 GT, myself, as a daily commuter.

As far as weight, I was told by everyone around that i should be like 3200 lbs.

Went to a CAT certified scale (they use 'em for the big rigs) and tipped the scales at 2950 without me, and a 1/2 tank of gas in it.

 

is that without the 1/2 tank of gas or with?


LMAO im just kidding....

 

Its all about what you want and how you want it. Some people diss on Fieros that's fine, its your opinion. I have enjoyed modding mine and making it the best I can. They are fun cars, but you definitely have to have a passion for it. Here are my rides.

 

L67 :rockon:

After looking at my GP, that engine looks funny "being in backwards".

Why is the S/C pully painted?

 

I wondered where the belt was, but now that you say that. It could slip or atleast smell bad till that paint in gone.

 

Watch This!

 

You can list at:
http://www.fiero.nl/cgi-bin/fiero/fo...er=4&SUBMIT=Go

However I don't know if anybody is going to want it. Its a RWD Block and a Fiero uses a FWD block, even though the Fiero is RWD. Make sense?

 

www.fiero.nl Forum 2 for the clutch slave info.
For the keys, get a new set of locks and ignition cylinder from the fiero store or similar.
As for the title you have to get the original owner to go to the DMV with you and get a new title printed up. Then you can get it transfered.

 

The original owner is in jail and gonna be there for a long long time. Kind of a no go on getting him to do the title. It was one of them if you want it for free, take it now or the junk yard gets it.

 

no, read what i typed before; it's a FWD block. thanks for the link though, i'll give it a try. this is not a block that's been in my camaro or anything so it not a rwd block. the guy i bought it from had intended to put it in a fierro, i bought it to get the cam and stuff out of it.