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  1. #1


    Hey, im thinking of instead of mounting my kit to a toyota MR2 im thinking aboubt bassing it on a Fiero...

    if i do the Fiero im gonna make it a convertible...


  2. #2
    Senior Member
    Join Date
    Dec 2002
    New England


    There is not a simple answer to that question but i will try to help you out. The 1988 has a much better suspension than the 84 - 87 versions. If you are going to use the stock suspension go with an 88 version but if you are going to upgrade suspensions to a wide track version than that point goes away as the older versions get converted to the 88 style anyway. The other factors are a slighly larger fuel tank in the 87 / 88 versions and the addition of a 5-speed manual tranny.

  3. #3
    Senior Member GSXRBOBBY's Avatar
    Join Date
    Aug 2003


    The susp. is better on the 88 but if your going to do any upgrades it really doesn't matter much, I would say it is easier to find a 84-87, I would have to say stay away from a 84. If your going to do a motor upgrade stay away from an 88 the inner strut tower or in alot more. An 88 also has harder and more costly replacement parts.
    I am in Lowell, Indiana<br />Building an 88 Fiero GT with a 93 STS Northstar and 5 speed Getrag. <br />Custom Mr. Mikes interior, Norms fiberglass nose and custom paint.

  4. #4


    Thanks guys... what year does the V8 come in and DO FIEROS REALLY CATCH ON FIRE ??? haha;s=x4

  5. #5
    Senior Member
    Join Date
    Dec 2002
    New England


    the V8 comes in any year but was not a factory option. It is a conversion that owners cna do or have done along with many other engine / tranny options

  6. #6


    Yes, Fiero's really do catch on fire - but not if you maintain them like you should. The GM bean counters reduced to capacity of the oil pan on the 4 cylinder (Iron Duke) model from the standard five quarts used in other cars to four quarts (3.8 litres) for the Fiero. With about one quart in the filter you only have 3 quarts to lube and cool the engine. Let the oil get a quart low an now you are down to two quarts which is not enough especially if you are cruising down the freeway at 70 MPH and one quart of it is in the head! Most often it would throw a rod which would then cause the oil that was left to be sprayed out onto the hot exhaust and it would quite often catch on fire.

    Bottom line - if it's a V6 (or converted to a V8) you shouldn't have this problem. If it's a four cylinder then change to oil per recommendations and keep an eye on the oil level and you shouldn't have a problem.

    BTW, IMHO, I wouldn't spend all the money to convert a Fiero to a kit car and leave the four cylinder in it.

  7. #7
    Senior Member
    Join Date
    Oct 2002
    San Diego


    Read about the fire isue here.
    I personally would skip the V8 and go for the 3.4 V6.
    The road to life is full of flat squirrels, who couldn't make up their mind!

  8. #8
    Senior Member GSXRBOBBY's Avatar
    Join Date
    Aug 2003


    Mad, I sorry but were you kinding around asking what year the V-8 was installed? There are several ways to go as far as a bigger motor or horsepower. Feel free to write and we can talk about it.
    I am in Lowell, Indiana<br />Building an 88 Fiero GT with a 93 STS Northstar and 5 speed Getrag. <br />Custom Mr. Mikes interior, Norms fiberglass nose and custom paint.

  9. #9


    Thanks again for the answers guys.... ya i was serious about wondering what year the V8 came in because i dont know to much about Fieros... im into Hondas Toyotas etc.. all the new stuff...

    so do you guys thing like an 1986 or 87 V6 is the best way to go for the spyder ferrari kit????;s=x4

  10. #10
    Senior Member
    Join Date
    Oct 2002
    San Diego


    The stock Fiero came with a 4 or 6 cylendar engine,the 2.5L (4) had about 90 horse power.The 2.8L v6 had an underrated 110 horse power,compared to the manufactures claimed 125 horse power.The reduction in horse power was caused by a metal lip or ring around each exhaust manifold port,reduceing exhaust flow.Porting the exhaust manifolds is fairly easy and will boost the horse power to about 140 (about a 30 hp gain).Other modifications can boost the stock engine another 20 hp.Even more if you live in a state or country that alows Turbos.But if your power hungry, try reading this link on engines.(I have seen Corvett motors in a Fiero,but thats definately not a stock motor).
    I belive the most Horse power would be from a Camaro or Fire bird Series II 3.4 (even better if you can get one with a Turbo like the Buick Grand National had or a Corvett motor.But the 3.4 would probubly be the most economical.For safety,I would rule out the V8,unless your willing to install a roll cage.
    Heres an interesting article called All Fierd up.
    Ideas for V6 power gains.
    A number of readers of this list have ask various questions about what they
    can do to improve the performance of their V6 powered Fiero's. The following
    was excerpted from "FIERO KITS-ALL FIRED UP!" by Herb Adams. Herb Adams has
    raced a variety of Fieros over the years, and currently sells some of the
    best suspension upgrade/racing parts for Fieros (see Peter's Fiero WEB page
    for address and phone number). The article was published in the September
    1991 issue of Kit Car. If you would like (and I find the time) I'll enter
    the remainder of the article that covers tires, suspension and handling. (A
    quick tease, Herb Adams on Fiero tires: The stock rear fenders have room for
    Goodyear ZRS 255/50x16 tires on 16x9 wheels, although 255/50x16 on 16x8
    wheels will also provide improvement.)

    ================================================== =============


    Even the fuel-injected V6 Fiero provides only average acceleration and top
    speed, so many Fiero owners want to know what they can do to increase their
    engine's power level, As part of the racing program, I conducted a series of
    power development tests to determine ways to improve the output of a Fiero
    V6 engine. Racing applications were at the IMSA Firestone Firehawk Events,
    which allow open exhausts, so most of the testing was done in this manner.
    The performance improvements, then, should be proportional of those found on
    a car with a street-legal exhaust.

    Before I made any changes, the stock V6 engine was dyno-tested "as
    installed" with the factory's exhaust, air inlet, and electronics management
    systems. As indicated by the power curves and the dyno data sheet, the Fiero
    V6 engine produced a peak corrected horsepower of 110 at 4500 rpm,
    significantly lower than the advertised 125hp. The difference might be
    accounted for by differences in dynos, but the important thing for the
    evaluation was to establish a good baseline.

    Blueprinting an engine refers to the practice of bringing all the internal
    specs and tolerances up to those published in the MVMA book. The process is
    simple, but time-consuming because the engine must be removed from the car
    and completely disassembled, My race team machined the block to provide
    .005-inches of piston fit and to produce the minimum deck height allowed. We
    also decked the heads to provide minimum chamber size. The bearings were fit
    to .0020 / .0025-inch, and all the rotating parts were precision balanced.
    Head porting is not allowed, but a precision valve job was done to ensure
    the best possible air flow through the heads. Out dyno testing showed that
    the blueprinting work increased peak output 3 horsepower at 4500 rpm and 17
    horsepower at 5500 rpm. Less friction and better breathing help at higher
    engine speeds, so if you're interested in using more rpm, it would be worth
    the effort. Note that the test on the blueprinted engine was done with the
    stock intake and exhaust systems.

    Open exhaust tests showed a six horsepower gain from 4500-5500 rpm. This
    system replaced the stock muffler and converter with a six-foot long,
    two-inch diameter straight pipe. Such a system is to noisy for the street,
    but it does show potential with an improved street-legal system. The open
    exhaust test was run with the stock exhaust manifolds and with the stock air
    inlet system.

    The next stage of engine development involved a high-lift camshaft. Most
    stock engines will see a power increase with more valve lift. We needed to
    keep the idle equally smooth and the emission levels the same as the stock
    engine, so we didn't increase valve timing. With a higher lift cam, the
    valves are opened faster as well as farther, but the opening and closing
    point are the same as stock. A high-lift cam increased the power level by 15
    horsepower at 5000 rpm and 14 horsepower at 5500 rpm.

    The level of increase might be less on a car with a street legal exhaust,
    but the effects should still be rewarding. Installing a new camshaft in a
    Fiero with the V6 engine requires removing the engine, so some owners might
    want to switch to 1.60 rocker arms instead. The performance improvement will
    be slightly less, but the installation is easier.

    Inspection of the Fiero exhaust manifolds showed some manufacturing related
    problems that severely restricted flow of exhaust gases. The attached sketch
    shows where the manufacturer left excess metal inside the manifolds. After
    these edges were ground away, power increased eight horsepower at 5000 and
    5500 rpm. You can eliminate these edges on your Fiero exhaust manifold with
    a small die grinder.

    FLANGE __x_________x__ Grinding off excess metal
    |_______________| in the exhaust manifold
    | | can result in a significant
    | | power gain. (Problem is at
    | \ points marked with x's)
    \ \
    __________________\xx xx\_______________________

    -------------------------> Flow of exhaust Gases
    __________________________________________________ ____


    (Approximated from chart) 3500 4000 4500 5000 5500 RPM's

    Ported Exhaust manifolds 109 124 135 143 139 HP

    Installed High-lift cam 103 117 126 135 132 HP

    Blueprinted Engine w/Open Exhaust 99 112 120 119 118 HP

    Blueprinted Engine w/Stock Exhaust 96 108 113 113 111 HP

    Pure Stock Engine w/Stock Exhaust 94 107 110 107 94 HP


    In searching for more power, my race crew tested the Fiero V6 engine on the
    dyno without the stock air cleaner and inlet system, and we were surprised
    to find that this produced no change in power. Apparently, the Pontiac
    engineers did a good job on these parts because they work well, even though
    they look restrictive.

    Another alteration that made little or no difference was cam timing.
    Advancing or retarding both the stock and high-lift cam resulted in power
    level changes of only one horsepower, more at some rpms and less at others.
    This shows that both cams are optimized at their normal position

    Testing various PROM (Programmable Read-Only Memory) computer chips in the
    electronic engine management system also showed that the Pontiac engineers
    did their job well. Different PROMS with various fuel/air ratios and timing
    curves showed no power improvement. We did choose a PROM with less full
    throttle enrichment at high rpm to help our fuel economy during the
    endurance races. This change gave us about five minutes more racing on a
    tank of fuel, so we used it for many events. The last race was run at night.
    The weather was cool so the air was dense. After about an hour of racing, we
    burned a piston from being too
    lean. We weren't too happy, but it showed again that the factory electronic
    engineers usually know what's best for the average customer.

    Owners of Fiero-based kit cars can make a number of performance improvements
    with a relatively small investment of time and money. Using any of all the
    above modifications will substantially improve speed and handling. Like most
    things, though, the results will be proportional to how much effort and
    money you choose to invest.

    ==============================================(Int eresting link on power upgrades,for a simular engine,but for a blazer)

    The road to life is full of flat squirrels, who couldn't make up their mind!

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