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AUTOCROSS AND SUSPENSIONS... by TRiAD
Started on: 11-09-2001 12:03 PM
Replies: 27
Last post by: cadero2dmax on 11-14-2001 12:28 AM
TRiAD
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Report this Post11-09-2001 12:03 PM Click Here to See the Profile for TRiADSend a Private Message to TRiADDirect Link to This Post
OK,
I have my 1985 GT 4sp now, and I'm in the planning stages of what to do for next season's autocross...

We have a local guy who used to run an 85 GT (and was unstoppable!), but he hasn't been there in quite a while, so I can't ask him...

If anyone here competes with their car, could you post what setup you're using and what you like/dislike about it?

Thanks!

------------------

TRiAD Motorsports \\\\ triadtuning@hotmail.com //// Michael ~ 85 GT 4sp

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Report this Post11-09-2001 12:16 PM Click Here to See the Profile for Turbo88Send a Private Message to Turbo88Direct Link to This Post
Eibach Sportlines, Koni adjustables. Poly everything except the engine cradle. Hard mount that if it can be done. One of the guys in our SCCA region ran a fiero with like 4* negitive camber and 0 toe. If you are running 50 series +, run as hard a spring as you can tolerate. Below that, you might want to go with a slightly softer spring to help your car plant a little better.

This is the best I can remember from what he had. Hope this helps...

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Report this Post11-09-2001 01:20 PM Click Here to See the Profile for Slammed FieroSend a Private Message to Slammed FieroDirect Link to This Post
Koni's
Modified Ground control coil overs
325lbs rear springs
1" front bar
1.25" rear bar
Coilovers up front (I forget the rate)
Good alignment with 1.5 negative camber up front...again forget the rear settings
No steering damper
235/45/17 rear
215/40/17 front
Lotsa poly
very neutral handling , ie nothing like a Fiero.

Join the Fieroracing list on yahoogroups //230 or so people so far. Lots of autocrossers.

when I do an engine swap I'm going to convert to an 88 cradle. Apperently the best setup is an 88 cradle on an 84 to 87 car. Better than the tubular suspensions..ect..ect.

Cadaero2Dmax will post soon , he is an authority on the subject.

JM

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85 gt fiero
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Report this Post11-09-2001 07:04 PM Click Here to See the Profile for 85 gt fieroSend a Private Message to 85 gt fieroDirect Link to This Post
My 85 gt rally car was set up for rally races, it has the following things done to it
Full roll cage, skid plates light bar in front 5 point harness,koni racing suspension the whole body is reinforced with 2" inch metal piping around the whole car, its quite heavy but is a blast to drive. It placed first in three different races across the us before the guy retired. it only has 68000 miles on it. and has a rebuilt tranny new clutch, and new engine.

------------------
RALLY CAR, FULL ROLL CAGE, SKID PLATES AND SOON TO BE BRIGHT YELLOW

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cadero2dmax
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Report this Post11-10-2001 10:25 AM Click Here to See the Profile for cadero2dmaxSend a Private Message to cadero2dmaxDirect Link to This Post
Sorta depends on a number of things.

The absolute first thing to consider before even washing your windshield is to determine what class you will be playing in.

Stock? Well, your options are limited, but you can make a pretty good handling Fiero with a set of Koni's, the right alignment. and some "R" tires. For stock, I would go with the 4 to 41/2 degrees caster already mentioned, I would go to 1/8" toe OUT
front, 1/8" toe IN rear. Try about 1.3 to 1.5
degrees negative camber(the same camber on all 4 corners). These settings would be a good place to start.

Street Prepared, Street Touring? NOW you can do the poly, delrin, or UMHW bushings(I can give you a contact if you need one, for these). Something a lot of autocrossers forget is that heavier springs really help tune a suspension. Of course, bigger swaybars (I like a 1" front on a daily driver) and add a rear swaybar (I just use the stock front bar here). Don't forget to improve your brakes - GA fronts are a good compromise (they add about 6lbs unsprung weight to the corner - I developed a set of racing pads for stock/street prepared cars last year, but they are no longer available to the public for "political" reasons). And here is where you can add a chip, work the ignition, install a header, etc. to eke some more power.

Street Mod 2 (if it becomes a National class) - here is where the lightweight Cad 4.9 should do well, with all the things shown in SP/ST above. Except I would recommend an '88 cradle here to improve handling even more.

But before I even got out of the chair, I would join
FieroRacingList@yahoogroups.com
where about 230 other competitors are there just waiting to help you through your season.

Hope this helps

G

------------------
G
Daily Driver -
85 SE
4.9 Cad
Isuzu 5 speed
'88 cradle
lowered 2 1/2"
Mr. Mikes interior

GRM $2002 Challenge Fiero
86 coupe
4.9 (carburated)
2.86:1 TH-125 w/shift kit

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TRiAD
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Report this Post11-10-2001 11:38 AM Click Here to See the Profile for TRiADSend a Private Message to TRiADDirect Link to This Post
Thanks all!
The SCCA is once again changing many of the classes and the new handbook will be out around New Years. As soon as I get that, I'll be deciding on a class. I know I won't run stock, so it's a matter of which SP or ST class I'll be in.

Thanks!

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Report this Post11-10-2001 05:08 PM Click Here to See the Profile for tomcat06085Click Here to visit tomcat06085's HomePageSend a Private Message to tomcat06085Direct Link to This Post
 
quote
Originally posted by TRiAD:
Thanks all!
The SCCA is once again changing many of the classes and the new handbook will be out around New Years. As soon as I get that, I'll be deciding on a class. I know I won't run stock, so it's a matter of which SP or ST class I'll be in.

Thanks!

Hi guys. I did a lot of autocrossing in the 1960's and 70's when MG's and Triumph's, along with Lotus and Porsche. My first racecar was an MG Midget that went from showroom to full modified in about six years. I owned and raced a lot of others, a monster Mini Cooper S with about 150 HP and weighed less than 1300 lbs. In those days it was a lot of trial and error because it was new and technology wasn't anything compared to today. With all the horsepower and suspension mods, you still didn't have the tires to go with it. Firestone Indy's were my choice...all out racing slicks that were made for oval sprintcars.

Anyway, after about thirty years of being away from it, I started watching some local club racing at LimeRockPark and parking lot autocrosses, along with some airports. At first glance, it seems the same, but I know it's not. My son will be preparing an 88 GT for me so I can race it in the spring. Even though it still looks easy, the stock class will be my starting point and I'm ready to learn it all over again.

Modern technology has changed the auto so that most cars on todays streets would have only been dreams back i the 60's.

I was looking at the pic below and wondered if anyone I ever competed against would have let this guy on the track.

------------------


tomcat...Thanks for the help!

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TRiAD
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Report this Post11-10-2001 05:14 PM Click Here to See the Profile for TRiADSend a Private Message to TRiADDirect Link to This Post
That X-19 ROCKS!

Thanks!

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Report this Post11-10-2001 05:38 PM Click Here to See the Profile for tomcat06085Click Here to visit tomcat06085's HomePageSend a Private Message to tomcat06085Direct Link to This Post

After watching this past season in CT, MASS, NY...it seemed that on most courses the Fiero's did very well, especially the 88 Formula's, but there is a guy with a GT that is always racing for best time of the day. His car is lowered, with coil over adjustable shocks. It seemed when he got it too stiff in the front it would tend to bounce...you couldn't see it from a distance but the stiffness made it bounce and understeer. When he got the back suspension too stiff, the car oversteered...very tail happy. I'm pretty sure he had Koni adjustables because he would get under it (jacked up, of course) and make adjustments to the sway bars and shocks. He used Khumo rubber that was pretty sticky.

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Report this Post11-10-2001 06:30 PM Click Here to See the Profile for shark93726Click Here to visit shark93726's HomePageSend a Private Message to shark93726Direct Link to This Post
I run a 87 SE with stock 4 cyl engine, totally gutless, but with nothing more than Bilstein shocks, solid offset UHMW Polyethylene bushings, solid pillow blocks and end links on the front bar, 14" by 6" rims with 255 Kumhos, (helps lower the car and keeps wheel weight down) 6 degreees caster on the front, 1.5 degrees camber front and 2.25 degrees rear, zero toe on front, 1/8 toe-in on rear, it is starting to beat nearly all the other street prepared cars on most courses that don't have long straights. We also took off the steering stabilizer, feels like we added power steering!!! Handling with this settings is almost perfectly neutral, under all conditions.

You can see the test car and read more info about it and the UHMW bushings on my web site.

Gerald Storvik (8shark.com)

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Report this Post11-10-2001 07:23 PM Click Here to See the Profile for tomcat06085Click Here to visit tomcat06085's HomePageSend a Private Message to tomcat06085Direct Link to This Post
Can you explain why the steering is easier with the stabilizer taken out and why the 255 profile Khumo tires. I can understand going to the 14 inch rims, but from what I've read and heard, this is best for pre-88 suspensions.
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Report this Post11-10-2001 07:30 PM Click Here to See the Profile for cadero2dmaxSend a Private Message to cadero2dmaxDirect Link to This Post
I would post photos of my Quad4 powered all out race "Prepared" Fiero if I could figure how photos are put on this forum.

Anyway, that yellow (currently) E-Mod car shown in the one post is 5 time National Champion Steve Tamandli. The Tamandli brothers are from the Midwest, Indiana, I believe. Steve was actually my instructor in the old McKamey's Driving School.

This car is powered by a racing aluminum Rover V*. It actually is a tube framed Formula chassis (I believe it is a Formula Atlantic, but it may be a Continental) with a Fiero body.

It is pure awesome!!

G

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cadero2dmax
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Report this Post11-10-2001 07:34 PM Click Here to See the Profile for cadero2dmaxSend a Private Message to cadero2dmaxDirect Link to This Post

cadero2dmax

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To add to that post above, the Rover V8 was putting out about 400 horsepower, but the entire car weighs in at 1600lbs.

The tires are Hoosier road racing slicks, 15x10 front and 15x13 rear.

The description Tomcat offered about bounce and understeer does not fit this car. Again, he is 5 time National Champ - - the car is right, it is awesome!!.

G

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cadero2dmax
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Report this Post11-10-2001 07:40 PM Click Here to See the Profile for cadero2dmaxSend a Private Message to cadero2dmaxDirect Link to This Post

cadero2dmax

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The Fiat is owned by a gent in the Midwest Division, I believe he is from Arkansas, I have run with him (sorta, we were in different classes, of course) at several Solotime Divisionals, etc.

Steve Hoelsher,(sic) is his name. And yes, he too is a Nat'l champ in DP. Since I ran in both FP and AP, we rubbed elbows in the pits quite often.

Now, how can I post photos of my racer?

G

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Report this Post11-10-2001 07:44 PM Click Here to See the Profile for cadero2dmaxSend a Private Message to cadero2dmaxDirect Link to This Post

cadero2dmax

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One more time, just to bump?

These photos both appear to be taken at Forbes Field in Topeka, home of the Nationals since they moved in 1995 (?) from Salina, KS.

G

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Report this Post11-10-2001 08:05 PM Click Here to See the Profile for cadero2dmaxSend a Private Message to cadero2dmaxDirect Link to This Post

cadero2dmax

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I give up. If I e-mail one of you my photos, would you post them?

G

[This message has been edited by cadero2dmax (edited 11-10-2001).]

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Report this Post11-10-2001 08:07 PM Click Here to See the Profile for shark93726Click Here to visit shark93726's HomePageSend a Private Message to shark93726Direct Link to This Post
Oooops, (brain fart) The tires are 195/55 series Kumho v700s.

22" diameter, about 7.5 " tread width. The reason is to lower the car about 1.5 to 2 inches without having to cut springs etc.

The steering is much easier, because the stabilizer is a VERY stiff shock absorber, which drags on the steering a LOT. The car can be a little freaky to drive on the street that way though, because every little bump feeds back a little through the steering wheel, so you have to keep your hands and attention on your driving. But it is a VERY nice improvement in ease and feel of what the car is doing.

Gerald Storvik (9Shark.com)

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Report this Post11-10-2001 08:24 PM Click Here to See the Profile for Slammed FieroSend a Private Message to Slammed FieroDirect Link to This Post

Here you go George!

And I thought I was serious about autocrossing! I would give my left.....To Drive that!

JM


[This message has been edited by Slammed Fiero (edited 11-10-2001).]

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Report this Post11-10-2001 08:30 PM Click Here to See the Profile for Slammed FieroSend a Private Message to Slammed FieroDirect Link to This Post

Slammed Fiero

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[IMG]https://www.fiero.nl/uploads/
dsc00002.jpg[/IMG]
One last engine shot

232hp , 1900lbs ...Giddy Up!

JM


[This message has been edited by Slammed Fiero (edited 11-10-2001).]

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Report this Post11-10-2001 08:48 PM Click Here to See the Profile for cadero2dmaxSend a Private Message to cadero2dmaxDirect Link to This Post
Thanks, SlammedFiero.

Below is a link to my Photopoint page with lots more, with the car on the banked oval at Texas Motor Speedway (I will BET it is the only Fiero on THAT track!!), Pro Solo, Drag Strip,etc:
http://albums.photopoint.com/j/AlbumIndex?u=142520&a=1342821

Another showing the suspension, and some of the mods:
http://albums.photopoint.com/j/AlbumIndex?u=142520&a=1044072

Now, e-mail me off list with a trainer how to publish photos :-)

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Report this Post11-10-2001 08:56 PM Click Here to See the Profile for PontiaddictSend a Private Message to PontiaddictDirect Link to This Post
 
quote
Originally posted by Slammed Fiero:

One last engine shot

232hp , 1900lbs ...Giddy Up!

JM


[This message has been edited by Slammed Fiero (edited 11-10-2001).]

There was a line break in the name of the picture that shouldn't have been there.

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Report this Post11-11-2001 04:53 PM Click Here to See the Profile for tomcat06085Click Here to visit tomcat06085's HomePageSend a Private Message to tomcat06085Direct Link to This Post
 
quote
232hp , 1900lbs ...Giddy Up!

JM

[This message has been edited by Slammed Fiero (edited 11-10-2001).][/B]

Giddy up is right! Don't let Cosmo Cramer in that baby. Shark...Thanks for explaining about the steering damper/stabilizer. Those pics I posted..the Fiat and the Fiero...were from a national solo event from the Hoosier Tire website. I didn't kow anything about either, except they were national champs from the mid-west.

I'm getting back into autocrossing after a thirty year forced layoff. Being in a wheelchair, plan to drive with handcontrols and auto tranny. I'd like to think it will be like getting back on a bicycle again, but I know it won't. In the 60's my cars were 1400 lbs tops and being a fit young man on my two feet with half a brain helped. Anyway, my GT will be twice the weight of what I was used to scootin' around. I've been driving with handcontrols for thirty years and most of my vehicles have had power steering, power brakes and very heavy.

I'll take any advice given because the only thing I really know about Fiero's is that they're good looking and mid-engine cars that will tend to understeer. Thanks in advance for any advice, any help...I figure you're never too old to learn.

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Report this Post11-12-2001 10:47 AM Click Here to See the Profile for AutoXerSend a Private Message to AutoXerDirect Link to This Post
 
quote
Originally posted by tomcat06085:

I'll take any advice given because the only thing I really know about Fiero's is that they're good looking and mid-engine cars that will tend to understeer. Thanks in advance for any advice, any help...I figure you're never too old to learn.[/B]

I have been autocrossing a fiero in stock class for 3 years now. I started with an 85 GT and now have a Formula. I am far from an expert but I would like to share a couple of things I learned.

First, the 88 is way better for autocross than the 85 was. The solid mounted cradle and the rear sway bar make the car feel much more stable. I can actual get the 88 to understeer or oversteer at will by using the throttle.

Make sure you get racing tires first and Koni shocks second.

I use the little metal clips for the seatbelt. The ones that people use for child carseats. I put them on my seatbelts to keep them tight and to keep me from sliding around. It is a small thing but it helps.

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Report this Post11-12-2001 11:16 AM Click Here to See the Profile for TRiADSend a Private Message to TRiADDirect Link to This Post
Don't you have to remove the Konis to adjust them?

Are there any adjustable shocks for the Fiero that don't need to be removed?

Thanks!

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Report this Post11-12-2001 02:15 PM Click Here to See the Profile for AutoXerSend a Private Message to AutoXerDirect Link to This Post
You can adjust the rears while on the car. Just set the fronts to full soft and leave them, then stiffen the rears till you get the results you like (about half way).
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Report this Post11-12-2001 06:37 PM Click Here to See the Profile for tomcat06085Click Here to visit tomcat06085's HomePageSend a Private Message to tomcat06085Direct Link to This Post
 
quote
The tires are 195/55 series Kumho v700s. 22" diameter, about 7.5 " tread width. The reason is to lower the car about 1.5 to 2 inches without having to cut springs etc.

The steering is much easier, because the stabilizer is a VERY stiff shock absorber, which drags on the steering a LOT. The car can be a little freaky to drive on the street that way though, because every little bump feeds back a little through the steering wheel, so you have to keep your hands and attention on your driving. But it is a VERY nice improvement in ease and feel of what the car is doing.

Gerald Storvik (9Shark.com)[/B]


Shark...can you give me an idea how difficult it is to remove the dampener/stabilizer and do you (or anyone else) know if your can fit the 14" rims front and back?

BTW...I do plan to run as stock as possible with DOT Khumo or Hoosier solo tires. What do you recommend? I've heard the Hoosier tire is sticky right from the get-go...where the Khumo tends to need warm weather or a long run to warm up.

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Report this Post11-13-2001 01:57 AM Click Here to See the Profile for shark93726Click Here to visit shark93726's HomePageSend a Private Message to shark93726Direct Link to This Post
14" rims should fit all of the 84-87 Fieros, you can even get 13" rims on the 84s, but it would be wise to measure the distance from the center of the spindle to the outer edge of your brake calipers to be sure.

The steering stabilizer is held on by a couple of 15 mm. nuts, if I remember correctly, and is quite easy to get off, once you jack the car up high enough to get under there.

I have been very happy with the kumho v700s, they are not quite as soft as the hoosiers, but they last longer, and cost a lot less. The Hoosiers will probably be a little faster though, so if price and life are not an issue, the Hoosiers would be better.

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Report this Post11-14-2001 12:28 AM Click Here to See the Profile for cadero2dmaxSend a Private Message to cadero2dmaxDirect Link to This Post
BTW, the cheap 14" BFG tires that tire rack has on sale - they call them rain tires - are the old 206 compounds that were so fast, but wore the "groove of doom" in the mid to late 90's. I think they are faster (albeit faster wearing) than the current Kumho's and Hoosiers, and at $47 per tire, you can afford to change them a little more often.

SSSSHHHhhhh - - don't tell anybody. I don't want Tire Rack to run out!!

G

------------------
G
Daily Driver -
85 SE
4.9 Cad
Isuzu 5 speed
'88 cradle
lowered 2 1/2"
Mr. Mikes interior

GRM $2002 Challenge Fiero
86 coupe
4.9 (carburated)
2.86:1 TH-125 w/shift kit

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