I know down in South Texas they have a 1 1/2 mile run for flat out speed. Does anyone keep track of the FASTEST Fiero?
http://www.texasmile.net/
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When life gives you lemons, thank them for the Fiero.

[This message has been edited by fierocarparts (edited 10-23-2009).]

https://www.fiero.nl/forum/Forum1/HTML/070670.html

quote Originally posted by Australian: https://www.fiero.nl/forum/Forum1/HTML/070670.html

I think he means top speed not 1/4 mile times.


There are a few threads about how fast in terms of top speed certain Fiero's are, But no we don't have a list thread.

There's one guy who said he got over 160mph... But he has a tube-chassis, purpose built race car. I forget the username.

So I guess this is the fastest AND quickest documented Fiero, right?

FieroX: 10.30 @ 132mph (3800-II, turbo / 4T65E-HD / drag radials)

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When life gives you lemons, thank them for the Fiero.

quote Originally posted by fierocarparts: So I guess this is the fastest AND quickest documented Fiero, right? FieroX: 10.30 @ 132mph (3800-II, turbo / 4T65E-HD / drag radials)

No, There is one person here who ran 138mph and video taped it. There are a couple of folks who have went just over 150mph as well.
I also doubt 132mph is as fast as FieroX's car could go on a top end run. That is just how fast it will go in the first 1320 feet.

How would you like us to verify the claimed speeds? Video and/or pictures provide solid evidence that can be used against you in a court of law....compared to the timeslips and video of the 1/4 mile times that are done in a legal and safe environment. Few of us have access to a "Texas Mile" type of run. Most race tracks are not big enough to see the top speed of most cars. The type of speeds some of these Fieros are capable of are far beyond safe, especially on public roads and in a 23 year old car. I feel a thread like this would be promoting illegal and dangerous acts...and I don't care to repeat any of my past legal problems.

quote Originally posted by Archie: My fastest in a Fiero was 138 in a 55. That was in '89 on I-88 West of Chicago. I kept my carbon copy of the ticket for years until the copy faded out. State Trooper with a speed trap. I was living in MI at the time, it cost me $600 in Bond money to get out of the state of IL that day. Archie

I'm not going to go out and get a ticket to prove anything, but according to the Viper GTS next to me, he said we were doing 165 mph when we pulled over to talk (that was many years ago). I was not maxed out with the modified L98 engine, and I know my new engine will push it to a limit that I don't want to go (165 was fast enough for me).

I've done 168 according to my GPS.

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62 Buick Special
86 GT, 5-Speed
87 GT, 3.4l DOHC Turbo 415 WHP, 11.9 @ 118
88 Toyota Supra Turbo

well, get a 3rd party verified speed, and post it up, and start the FASTEST Fiero Thread
I know me & my 4.10 gears will not be making it

will a dyno run, tire size & gear ratio count for an calculated top speed?

is there something like a "top speed" run you can do on a dyno, where you put it in the top gear, and extrapolate?

I would think a 5-spee would have the better gearing for a top speed run.
I too have seen the 160 mark.

there is a race in Big Bend Texas that has caught my eye. different classes, but you can go with the avg.100-125 or 125-155 or more classes ! closed road! how cool does that sound?
I will be looking into that and then some serious wrench turning for tightness and such maybe not next year but within three years from now I might run there.

I considered starting a "Top Speed List" to go along with the Quarter Mile List, but didn't think it would be active enough to stay out of the archives.

Although, if Cliff were to sticky it (and the Quarter Mile List, hint-hint)...

Maybe I could attach it to the Quarter Mile List as an add-on section? Thoughts? Opinions?

[This message has been edited by Blacktree (edited 10-26-2009).]

Not to doubt a single person's word but it would be very easy to apply the same rules to the fastest times as are applied to the 1/4 mile run. We all know that video can be altered. Speedos can be rigged (as well as be off).
Yea let's face it FieroX's car probably isn't topped out at the end of the 1/4 but he has a time slip.
Now for those that have speeding tickets that showed paid to the city/county/state, I think that would be a good benchmark. Who in their right mind would want to pay the impound fee, and ticket just to prove that they have the fastest Fiero? In most places 160mph in a 70 or 80 will get your car impounded and possibly your license.

Just like 1/4 mile tracks aren't "just around the corner" for everyone, I'm sure if someone was to look, there are places that have abandoned airstrips that do this.
I'm not sure that I would take one of these cars up to the speeds that people have claimed.

This was simply a question that came into my mind and out my fingertips to see if there was a verifiable list made for the fastest Fieros when I kept seeing the 1/4 mile list.
I think that it would be good to document a top speed list just like the 1/4 mile list. Some people like quick and some like fast.

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When life gives you lemons, thank them for the Fiero.

I have personally done 140 in my old 3800SC GT at the Texas Mile (need to find the speed slip). Don't know what the V8 will do. I will be gunning for signifacantly more though. Aerodynamics are more important than anything else and I have paid close attention with previous problem areas. For example:
Nose lift solved with deep hood air extraction and non-visible valence dam under the nose.
Heavy turbulance behind the rear glass solved with glasshatch.
Heavy drag from rear wing replaced by lip spoiler.
Body rake increased for positive downforce.
Maybe it will pay off next season.

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87 GT Tilt Clip-Widebody-RamAir-Fastback-GlassHatch Powered by SBC 383 6-speed w/ NOS
Build Thread

"Roads?...Where we're going, we don't need roads." - Emmett "Doc" Brown

I have personally done 140 in my old 3800SC GT at the Texas Mile (need to find the speed slip). -Clay Tonto

They have records online depending on when you ran. I don't have WORD so I can't see it. IF this list were ever put into place, you could at least say that at one point you had the Fastest (documented) Fiero on PFF.

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When life gives you lemons, thank them for the Fiero.

maryjane's wife and I went over 120 and 140mph! so I at least have a witness for that

where is this texas mile? when?

http://www.texasmile.net/

My car, and coincidentally fierox's car tops out around 140/145.

If we were to try to use overdrive to go fast, we most likely wouldn't even make it to 150... People that have with our transmissions just dont make the power we do, or got really lucky.

How about using the search engine for "top speed"?

Duuuhhh

https://www.fiero.nl/forum/A...030531-1-024961.html

And part 2

https://www.fiero.nl/forum/A...060811-1-056622.html

The Texas Mile is the place to go if you want to go really fast. They don't require near the safety equipment as the Salt Flats or the airstrip in North Carolina (I can't remember what it's called) You only have to have a 4 point cage, fire safety system, 5 point harness if you excede 190 MPH in the mile. Anyhing less than 190, all they require are good condition seatbelts, a fire exstiguisher, a helmet, and the general mechanical inspection.
If your going to take a Fiero or any other older car there, I suggest at least installing new factory belts or a 4-5 point harness. Depending on the tech inspector you get, they may or may not let you run with an older stock belt. Some even require proof that the belt is less than 5 years old, though they are not as strict with slower cars. You just have to use common sense.

There is documented proof of a Fiero clocking 147 MPH at the Bonneville Salt Flats in 1998. I have the article if anyone is interested. But that record should be easy to beat, thanks to the plethora of engine / tranny swaps now available.

How to people not get the front end airborne at these speeds?

Could you post more details?
Notchie, Aero-notchie, Fastback, weird hybrid?
Hood scoop, headlights up/down, wing yes/no, etc.?

My 140 run was in a 87 GT Fastback 3800SC pulley mods and methanol injection with hood vents only. Everything else was stock. Headlights were down during the run. The run was finished in 4th gear at about 6400 RPM (a shift to 5th would have been useless)
I would not want to go any faster on the stock front spindle and bearings. After that day my left front bearing starting making noises and had to be replaced.
This is why I am using rear hub assemblies on the front of my current car. They have been tested on a dyno to 210 mph. But, this still doesn't consider hard acceleration or braking forces at those speeds. Though real world testing will be the true judge, I have far less fear with this setup.

quote Originally posted by Austrian Import: How to people not get the front end airborne at these speeds?

Lots of mods:

[This message has been edited by ClayTonto (edited 10-27-2009).]

I've been @ 150mph in my 3.4 DOHC ..I am assuming my Northstar can get to 160 or better at a quicker rate but I am not going to find out unless I do some suspension mods and on a airport runway somewhere

Sorry if I hit a nerve by asking what I thought was a simple question.
I think about how many times I've read questions about how tire size affects speedo readings. Not sure that I would try some of these speeds on "factory" tires.
As far as dyno results it would be difficult (not impossible) to calculate wind resistance.
Tach reading at "such &such" MPH also doesn't figure wind. I know that 3K RPMs going down hill at 75MPH isn't the same as pulling up a hill at 3K RPMs at 55MPH.
In the 1/4 mile times, eyewitness accounts don't seem to carry weight as neither do GPS readings.

So how accurate is the "top speed" threads previously posted?

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When life gives you lemons, thank them for the Fiero.

I'm going to assume that people are doing those runs safely, and in safe conditions.

Please post more info on car mods though. Include tire size and rim size as well with my above questions.

quote Originally posted by Austrian Import: Could you go into a bit more detail about your rear bearing setup on your '87? I thought only '88's had really weak bearings. I didn't know the '87 spindle is considered weak.

The 87 front spindle is not what you would call weak. The problem is that it uses "floating" inner and outer bearings and they may or may not be weak. The rear hub/bearing assembly uses larger sealed bearings and is stronger. I have HTMotorsports slalom kit which utilizes rear hubs on the front. I will also be using a laser height sensor with a dash readout to let me know if I start to get lift on the front of the car. Safety first.