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Author Topic:   what is going on here?
One87Racing
Dirt Full Roller

Total posts: 68
posted April 08, 2003 08:35 PM  
Having a problem with a 78 firebird. It pushes real bad going into the corner. I have no sway bar, a stock cut LF spring, a pontiac wagon spring cut down in the RF, a stock RR and the LR is stock plus two - half springs. The car is a little tight out, but I run the same size tire on the rear (235/60/15). RF tire is same size as the rears and LF is 225/60/15. Camber is set 2 deg negative RF and 1.5 positive LF. Toe is 1/8 bias to LF. I'm not sure on caster, it's close to stock spec if i recall correctly. Also, a friend said the RF tire looked like it was rolling under (not just the tire, the whole wheel) and thought I needed more camber on the RF. Do I need to put the sway bar back on to control the body roll or is there something else i'm missing here. PLEASE HELP!!!

Pickel
Dirt Forum Champ
Total posts: 784
posted April 08, 2003 09:06 PM  
The first thing I would check would be to see if the shock is binding up. I had some Pro shocks that I was using with spring spacers. They would hit the rim of the spacer and not let the suspension travel. It pushed so bad I hit the wall. Steve Smith suggests -3 degrees of camber on the right. I would set the caster if you could, I think it will help it alot. I know I can tell a world of difference in my car once I set it correctly.

------------------
Scoot
Smith Racing Team
870-365-5989

Eljojo
Dirt Forum Champ
Total posts: 968
posted April 09, 2003 06:20 PM  
I'd suggest cleaning the sidewall of the tires before the heats. That way you can see just how far they're rolling under. Remember that air pressure will not change the roll-out on a radial tire, but will affect the spring rate tremendously. We tested and on our street stock every four pounds of air changes the cross a full half %. That may not sound like much, but our car will push at 50% and be loose at 48%.

dirtracer7
Dirt Freak

Total posts: 337
posted April 10, 2003 11:41 AM  
Had same problem last year ended up being not enough camber in the right front.Tire was rolling bad and wearing quick.After things where in place tire wear went down to hardly any.

66jj
Dirt Forum Champ
Total posts: 823
posted April 11, 2003 08:53 PM  
caster makes a world of difference get a gauge they are as low as 90 bucks now... howe racing.

then get some racing springs all 4 corners. stock rear are tooo soft.. they will lift the front too much for steering to work causing a tight off.

300 bucks on 4 springs is money well spent way better than motor mods..

stock decent shocks are ok for a lot more than people think, i personally have taken of pro welded brg and put stock oem monroes from a junk yard on to prove to whiny (non)competitors that i could make it work. it was hard to hold on to the car and it transfered eratically, but it was faster with the junk, though very uncomfortable to drive. granted i drove the $hit out of it white knuckels and all.

jeff

One87Racing
Dirt Full Roller

Total posts: 68
posted April 15, 2003 12:53 AM  
I'm going to re adjust the camber and caster this week and slap a sway bar back on it (disconnected first, and then connect it after a couple hot laps) to see what it does. I'm not allowed racing springs in my class, so I'm trying different variations of stock stuff. I'll let you all know what happens! Thanks for the input

b4racing
Dirt Forum Champ
Total posts: 626
posted April 15, 2003 01:28 PM  
I would have all your springs rated at a local race shop they might sharge you a couple dollars but then you will atleast have a baseline and give us some numbers to work with. Bobby

YAZ
Dirt Maniac

Total posts: 147
posted April 16, 2003 10:39 PM  
I could be wrong but Idont think the
sway bar will help with a push. If
I remember right, when I use to run
a sway bar it only helped when I was
loose and got in the way when it was
tight.

One87Racing
Dirt Full Roller

Total posts: 68
posted April 19, 2003 08:39 PM  
Here's some feedback from racing today. I had the car re aligned (more RF camber and more caster all around). I ran the car on a dry, tacky and then a wet track and it seemed to be loose in and about halfway thru the corner, I could stand on the go pedal and it would stick. I put the sway bar on (solid link on RF and just a double nutted bolt on the LF adjusted so it was just putting tension on the bar at rest) and the car would then stick hard everywhere. I finally got it! Thanks for the help!

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