Just out of curiosity I was wondering if anyone here ever raced a 3.4 fiero against a turbocharged 2.8 fiero. I think that the turbocharged 2.8 would win against the stock 3.4 but a modified 3.4 would be a challenge.

Using Dragstrip2000 these are the best times I get with a 200 horsepower turbocharged 2.8 vs. the 210 horsepower modified 3.4 I'm building with a 5-speed Getrag transmission and sticky tires.

Turbocharged 2.8 goes 0-60 mph in 5.66 seconds and runs the quarter mile in 13.95 seconds @ 96.5 mph.

Modified 3.4 fiero goes 0-60 mph in 5.51 seconds and runs the quarter mile in 13.79 seconds @ 98.2 mph.

If anyone in the New England area would like to step up to the plate and race me at the race track this summer lets do it and see what happens.

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What's been on my mind lately is swapping out the 2.8 for the 3.4 and using my existing Miller Woods turbo system. I'm already on my second auto tranny. I wander if it could handle a turbo3.4. What do you think? 300 HP?

I couldn't do it, my SE only has 54K miles on it and runs very strong. There's no reason for me to swap engines, it's fast enough.

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"Fast enough" ?? No such thing hehe.

3.4 turbo would be a nice setup.

While were talking turbo's
Does anyone know if the turbo off a late 80's
Sunbird GT would work?

3.4 or 2.8 turbo? Thats the question.

TurboSE 250-270 horsepower depending on your mods with 8-10 psi of boost.

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My Dyno run with a pretty much stock 2.8 with a Design One Systems Stage II turbo system produced only 165 hp 207 ftlbs at the wheels. I think a slightly moded 3.4 would win. I think the turbo that I have would be to small on a moded 3.4.

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quote Originally posted by 88formula: Turbocharged 2.8 goes 0-60 mph in 5.66 seconds and runs the quarter mile in 13.95 seconds @ 96.5 mph. Modified 3.4 fiero goes 0-60 mph in 5.51 seconds and runs the quarter mile in 13.79 seconds @ 98.2 mph.

If you can pull 13 sec at only 96 mph, you are doing some great driving. I bet that program is just quoting what 'could' be run at a given mph, but it can be done.

BTW, I have an IHI turbo that was stock on the 87-88 Tbird turbo coupe for sale, here are some pics:
http://scribers.midwest.net/bbbad50/parts/turbo1.jpg http://scribers.midwest.net/bbbad50/parts/turbo2.jpg http://scribers.midwest.net/bbbad50/parts/turbo3.jpg http://scribers.midwest.net/bbbad50/parts/turbo4.jpg

$100 plus shipping

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BBBAD V8 For Sale

BBBAD 5.0

But...
I think a turboed 2.8 would kick a modded 3.4 all over the place in the mid RPM range where it counts; in day to day driving.
Also remember that Predators' installation is running sickly lean, therefor, has lost power.

I knew someone was going to challenge this! Think about that BBBAD GT, when you look at similar sports cars today with similar horsepower they have similar results. The Honda S2000, Porsche Boxter S and the BMW M roadster all go the quarter mile in the very high thirteen second to low fourteen second range under or at a hundred mph.
The times I posted are the very best you could expect driven perfectly in perfect conditions with good tires and very high launch rpm’s.

Back to the original question.

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I dont think that a 3.4 can beat a turbo setup.

1. The 200 hp from the turbo setup are in the wheels, thats using the dyno sheet from the supercharger from RS Motorsport @9psi. Also i dont see any kind of fuel mod in the kit, btw the sc belt will take some hp too.

2. The 210 hp from the modified 3.4 is based on speculations. I dont see yet a 3.4 dyno sheet to prove the real power of it.

3. The best bet is a 3.4 Turbo. Im in the search of the engine to make it. I create a perfect setup to reach the 300+ hp but im lack of $$$. Also an crazy idea comes to me to build a twin turbo. HEheh I have lots of ideas but not lots of money.

DreX

Why don’t you think that a 3.4 fiero could beat a turbocharged 2.8 fiero, explain your opinion.

You could have entirely different results from the supercharger compared to the turbocharger. Even two different turbochargers could give you very different power outputs. I was talking about a turbocharged fiero and specifically the Design one turbocharger. The condition and modifications made to the engine also have considerable results on power output.

Norris Racing, which is now New Tec, made a high performance 3.4-liter Camaro engine that put 169 horsepower to the rear wheels in a Camaro. I think that the fiero’s power train is more efficient than a Camaro’s power train, which means that, that motor in a fiero would put more power to the rear wheels. This guy http://www.angelfire.com/on/freddysplace/Page1.html built up a similar engine and with his G-Tech says he has 185 horsepower to the rear wheels. I’m almost positive that my engine will make at least 210 horsepower if not more, which translates to 168 horsepower to the rear wheels. This program I have has been so far pretty accurate when I compare it to real dynos and drag results of real cars. Using this program is a whole lot better than guessing and the best part is you can see the power characteristics of each camshaft in a particular engine and how it would perform in your car. To me that’s valuable information and it saves time and money.

For example When I put together the specifications for the stock 2.8-liter engine I get 134 horsepower @ 4500 rpm and 180 ft. lbs. of torque @ 3000 rpm. When I load that engine into the Drag program with an 88 formula weighing 2925 lbs. with the driver and the five speed transmission I get 0-60 mph in 8.15 seconds and the quarter mile in 15.92 seconds @ 83.6 mph. I used a launch rpm of 2500 and shift @ 6000 rpm. If I use a launch rpm of 2500 rpm and shift @ 5700 rpm those times drop to 0-60 mph in 7.91 seconds and the quarter mile comes in at 15.82 seconds @ 84.3 mph.

Looks pretty close to what my car did when it was stock.

I guess no one has ever tried this before. Anyone have a turbocharged fiero in the New England area?

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Weeelll. This explains MY opinion; http://www.turbofast.com.au/TFmatch.html
This is how turbos can make other cars suck dirt. (Assuming you know what you're doing.)
I luv that site (sniff).

quote Originally posted by 88formula: I knew someone was going to challenge this

Just basing this off my past dragstrip experiences, more so than a computer program. It would be more accurate to project MPH than ET based on HP, just for the very fact that you pointed out. Heck, I wish I could say I have a mid 10 sec street 5.0 based on my MPH (127mph at 3400lb), but I can only say its a 11.13 sec machine .

I only managed 150HP at the wheels with my rebuilt 3.4OHV...I assume the 210hp 3.4 you were originally refferring to is the DOHC 3.4...
I had ported heads & intake, Sprint headers, hollow cat, IRM muffler free dual exhaust, 44psi fuel pressure at idle, 1.52 roller rockers, crane 2030 cam, hipo retainers, SS valves, double springs...
so 165hp at the wheels from a turbo 2.8 would definitely beat my setup...

Formula88 - I dont know the parts that the designs 1 turbo kit envolve. I will make the setup on my own. I have been arround looking for info on turbo setup and understand how very simple it works. As far I know, there is no fuel mod made by the kits, Lagrua setup, and frenzy doesnt have any fuel mod(I guess). The turbo engines use way more fuel than the n/a engines, eaven beeing the same model. The turbo kits that i saw for fiero will make more hp, but not all it can give.

The supercharger still some power that it gives, dont know how much but does. Turbo will give more power and is more upgradable than sc. I we say that the same air flow gets inside the engine the turbo will make more power than the sc, cause the pulley.

Why a crx turbo can make -9sec in the 1-4 mile?? Is a 4 cil!! Those engines are perfect matched air/fuel ratio, besides al race stuff. An Eclipse Turbo makes 210hp stock. If you modified it can pass the 300hp, and still a 4 cil engine. For sure the fiero engine is not perfect in any way.

A 3.4 turbo will be exelent. Why?? simple, desplacement. More displacement, more air/fuel you can take in to it.

When I bulid mine I will document everithing with pics and ideas. Im far from it, only have a few parts an still ned the 3.4 engine. This will envolve some money and thats what dont have. 4 Sure it will take me more time to get things done. By now i recieve yersterday the Intrax springs, need to recieve some parts from fiero store to finish the front suspension and brakes, the i will start with the rear part of the car.

I hope to fullfill you question.

Peace

DreX

lou_dias you are actually doing pretty well with that engine. I used Dyno2000 to predict what power you are making with the modifications you have and got 176 horsepower @ 5000 rpm and 223-ft. lbs. or torque from 3000-3500 rpm. With a 20% drive line power loss that should give you about 141 horsepower to the rear wheels. With 150 rear wheel horsepower you should have about 187 horsepower at the flywheel. I think your limiting factor is the sprint manifolds. If you had tuned headers you would probably have over 200 horsepower.

What did you get for torque to the rear wheels? Could you post a picture of your dyno sheet?

If you give me your vehicle information like weight with you in it, transmission, your shift points and launch rpm, gear ratio, and tire size and kind I can test my program against your actual drag strip results. I also need to know the elevation of the track, temperature, wind speed and direction, humidity and barometer, and the condition of the track. Give me as much information as you can possibly think of and I will test my program against your actual results. Don't tell me your times until I post mine. This should be interesting.

The 3.4-liter engine I am referring to is the OHV engine like yours. Could you also describe exactly how and what you ported in the heads?

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