Visit The Dirt Forum for More Information

Author Topic:   TBIRD INDEPENDENT REAR PURE STOCK
pmiracing
Dirt Full Roller

Total posts: 44
posted February 11, 2004 04:53 PM  
I have a 90 t-bird pure stock with an independent rearend. I am looking for any info anybody has on setups. I have to run stock springs w/ no spacers, stock rims + tires. I ran it twice last year but it pushed bad. I unhooked the front swaybar but thats it. I think it will be fast if I can get to turn.

Drogo99
Dirt Maniac

Total posts: 120
posted February 11, 2004 05:43 PM  
What size and banking is the track?

There was one down in our area that ran on a 3/8 high bank and was a bullet!

pmiracing
Dirt Full Roller

Total posts: 44
posted February 11, 2004 06:07 PM  
the track I ran it at was a 3/8 mile flat, maybe 10-15deg. bank. I want to run it in an enduro at a 1/4 mile high bank this year to. thanks

Drogo99
Dirt Maniac

Total posts: 120
posted February 11, 2004 06:20 PM  
I know the guy down here always feathered the throttle all the way through the turns. He never tossed the back end....

Or you could get some stiffer springs and paint 'em black....odds are no one will ever notice the difference except you.

circledirt
Dirt Roller

Total posts: 22
posted February 11, 2004 06:51 PM  
Did you scale it? What's rear percentage?, left and right rear weight? A push is usually too much nose weight.

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

pmiracing
Dirt Full Roller

Total posts: 44
posted February 11, 2004 07:01 PM  
I haven't had a chance to scale it, but I have removed anything that's allowed, moved anything I could to the right rear and with a full cell it is 75lbs. over weight.

dirtracer7
Dirt Freak

Total posts: 337
posted February 11, 2004 07:03 PM  
lucky you try to get them to let me run one at our track and they said no!!!! but we can run boat parts.

pmiracing
Dirt Full Roller

Total posts: 44
posted February 11, 2004 07:17 PM  
yeah, I checked almost all of the track rules in our area and found only a few that didn't say "no independent rears". The first time I took it to the track the teck guy told me it was front wheel drive! He looked all over the car trying to find something that didn't fit their rules.

dode
Dirt Forum Champ
Total posts: 613
posted February 12, 2004 12:08 PM  
I'd think you should be able to get it hooked up pretty good. I have a 91 SC and a 95 Cougar 4.6. The SC has been extensively modified but the Cougar is pretty stock. The non-SC springs (except 96-97 sports) pretty much suck. Find some used SC or sport springs and shocks. If they're SC shocks, lock them in the firm mode, although even in soft mode they're stiffer than standard pieces.

Weight wise (depending on motor) it should be pretty good out of the box. I believe one of the things the development team was striving for was balanced weight. I think I'd heard it was like 51-52% front and 48-49% rear with the SC's (added weight of blower, intercooler and a ton of option equipment compared a standard car).

Have you checked tire temps? With the wide ajustability of the suspension (camber, caster, toe in front. Camber and toe in rear) you should have the range to get the rear's working. Maybe hook the front bar back up and disconnect the rear bar?

Good luck!

pmiracing
Dirt Full Roller

Total posts: 44
posted February 12, 2004 04:03 PM  
Thanks for all the info! Right now it has the stock 3.8L springs and shocks. I tried unhooking the rear sway first and that didn't help any (I think it gains too much camber in the rear) I think I know of a super coupe I can steal the springs and shocks off of. Right now I am running a 289 motor.
thanks

pmiracing
Dirt Full Roller

Total posts: 44
posted February 12, 2004 05:06 PM  
Thanks for all the info! Right now it just has the stock 3.8L springs and shocks but I think I know of a super coupe I can steal them off of. I tried unhooking the rear sway first and that didn't help any. Right now it has a 289 motor and I dont know how that figures in.
thanks

circledirt
Dirt Roller

Total posts: 22
posted February 12, 2004 06:09 PM  
Are you allowed to lock the rear end? Smaller diameter tires on left side would help. Lots of things you can do to get rid of push if rules allow.

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

pmiracing
Dirt Full Roller

Total posts: 44
posted February 12, 2004 06:16 PM  
70 series tires bought from track (track stamped) and no limited slip or locked rears
thanks

Eljojo
Dirt Forum Champ
Total posts: 968
posted February 12, 2004 07:22 PM  
Hook your sway bar back up. (I can't believe I'm saying this) Unload the right front by putting a short spacer in your swaybar link on the right side and a long one on the other. You moight even try the opposite on the rear. You've probably got too much cross and you can remove it that way. There was a guy who ran one of those things here and he was awesome in the corner! 302 didn't have the power to run the straights tho!

Raz_900
Dirt Forum Champ
Total posts: 635
posted February 13, 2004 09:19 AM  
quote:
Originally posted by Eljojo:
Hook your sway bar back up. (I can't believe I'm saying this) Unload the right front by putting a short spacer in your swaybar link on the right side and a long one on the other. You moight even try the opposite on the rear. You've probably got too much cross and you can remove it that way. There was a guy who ran one of those things here and he was awesome in the corner! 302 didn't have the power to run the straights tho!

The MN12 Tbird/Cougar (89-97) don't have sway bar endlinks like normal cars. They're more like hemi joints or maybe a tie rod end. But, they're not really adjustable with shorter or longer pieces unless you were to cut them and reweld shorter or longer.

Check out this site, www.mn12performance.com. Rich has alot of polyurethane bushings available that will help your suspension work better. He has kits that cover the entire front suspension, rear diff mounts, rear spindle bushings, shock bushings and even bushings for the tranny and crossmember.

If you call him.. tell him Steve sent you and he better help you out or I'm not answering any more of his SC engine questions.



pmiracing
Dirt Full Roller

Total posts: 44
posted February 14, 2004 08:58 AM  
THANKS I went on the mn12 website and they have a lot of good info on how to strenghten the rear suspension. as far as the swaybar links when I unhooked the bars I just cut one of the links and when I hooked the rear back up I lapped the link over about 2 inches and welded it to preload the RR- I can do the same with the front.

thanks again for all the great info

pmiracing
Dirt Full Roller

Total posts: 44
posted February 14, 2004 09:03 AM  
Anybody know if you can fit a 351w carburated in one of these things? The 289 is awfully tight to the hood.

Raz_900
Dirt Forum Champ
Total posts: 635
posted February 15, 2004 11:12 PM  
quote:
Originally posted by pmiracing:
Anybody know if you can fit a 351w carburated in one of these things? The 289 is awfully tight to the hood.

I know a guy that has put a 460 in a MN12 car. A 351W would be a piece of cake. If you want info or advice, go to www.sccoa.com and ask ProStreetRich. He's the one that did the 460 swap with no butchering of the car.


eborcim
Dirt Freak

Total posts: 303
posted February 19, 2004 10:42 AM  
I like to see this one in action.

Back to the Archives