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Author Topic:   Adjustable coil overs. Which way?
clevelandstyle
Gearhead

Posts: 800
From: Connersville, IN
Registered: Jul 2001

posted 04-28-2003 11:00 PM     Click Here to See the Profile for clevelandstyle     Edit/Delete Message   Reply w/Quote
Over the winter I installed a set of Strange single adjustable coil overs on the rear on the Fairmont. Everything went great and I have a lot more tire clearance. I went to the track last week so I could dial in the stocks. I got my best 60' time to date. 1.56 The only problem I had was the car pulled to the right on the launch. I was keeping the shock setting even from side to side. I am assuming that I need to stagger the settings. Which way do I adjust the shocks to correct this?

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Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 351C 4V

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clevelandstyle
Gearhead

Posts: 800
From: Connersville, IN
Registered: Jul 2001

posted 04-29-2003 06:19 PM     Click Here to See the Profile for clevelandstyle     Edit/Delete Message   Reply w/Quote
ttt

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kid vishus
Gearhead

Posts: 5248
From: middle of NC
Registered: Oct 2000

posted 04-29-2003 06:46 PM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
When my car had a tendency to go left off the line, I ran the shocks set with the passenger side shock 2 clicks stiffer than the driver's side. So, based on that, it would appear you need to stiffen up the drivers side shock.

Is the weight bias even across the rear of the car with you in it? That tends to make them not go very straight too. And now that you have good shocks, it may just be amplifying that.

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clevelandstyle
Gearhead

Posts: 800
From: Connersville, IN
Registered: Jul 2001

posted 04-29-2003 07:18 PM     Click Here to See the Profile for clevelandstyle     Edit/Delete Message   Reply w/Quote
Thanks Kid. I haven't weighed the car from left to right. It sets level without driver. My fat ass is a problem.
So you are saying that I need to stiffen the shock opposite of the direction the car is going? Cool. Thanks.

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Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 351C 4V

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kid vishus
Gearhead

Posts: 5248
From: middle of NC
Registered: Oct 2000

posted 04-29-2003 07:21 PM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by clevelandstyle:

So you are saying that I need to stiffen the shock opposite of the direction the car is going? Cool. Thanks.



I'm not going to guarentee it will work, but that worked with my car. The tire on the opposite corner of the direction the car wants to go has more bite, so you slow down the shock speed on that side to try and take some of the bite out of that side. At least, that's my understanding of it.

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clevelandstyle
Gearhead

Posts: 800
From: Connersville, IN
Registered: Jul 2001

posted 04-29-2003 07:26 PM     Click Here to See the Profile for clevelandstyle     Edit/Delete Message   Reply w/Quote
If the car is low on the drivers side with me in it, should I raise it or just mess with the shocks?

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Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 351C 4V

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jsracingbbf
Gearhead

Posts: 2160
From: Batesville,MS. , U.S.A.
Registered: Mar 2002

posted 04-29-2003 08:30 PM     Click Here to See the Profile for jsracingbbf   Click Here to Email jsracingbbf     Edit/Delete Message   Reply w/Quote
Ride heigth should be with driver included. This is right out of Dave Morgan's Chassis book. I asked Alex about setting the QA1's and he gave me a starting point. However your's is a different deal. he may be able to suggest something for you like KV did. One thing I would ask is this:
1. is this a ladder bar car?
2. is there any preload in one side or the other with the ladder bars.
3. Preload MAY exist once you get in the car even though there is none with you out of it.
I always get a bunch of weights and sit in the drivers seat to set my car up. Also, my car is light enough to set it on 4 55 gallon drums ( using a lift ) then set up all the rear suspension. You have to get it LEVEL like it is sitting on the ground then get under it and adjust the bars, 4 links whatever. Once you sit some weights in the seat and crawl under your car the problem may become obvious. Lord knows I am no chassis expert but I Hope this helps.

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Jerry
69 Mustang Pro ET Drag
70 Mustang retired former footbrake car

HOLLA IF YA HEAR ME

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kid vishus
Gearhead

Posts: 5248
From: middle of NC
Registered: Oct 2000

posted 04-29-2003 10:40 PM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
That's what I always did. I set weights equal to me in the seat before I adjusted anything serious (pre load, ride height, etc). I also run some pre load in the right rear spring, about 3/4" of preload in the spring. I've got the car working well enough now that I run both rear shocks on the same settings. That is, unless the track is doing something goofy that day.

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clevelandstyle
Gearhead

Posts: 800
From: Connersville, IN
Registered: Jul 2001

posted 04-29-2003 11:56 PM     Click Here to See the Profile for clevelandstyle     Edit/Delete Message   Reply w/Quote
The car is not a ladder car. It is still a factory 4 link(fox chassis) that is mini tubed. In addition to the coil overs I installed new adjustable control arms with no rubber bushings. The geometry can't be changed, but there may be some adjustment as far as preload. I can also preload the spring easily.
Thanks guys. You have given me some things to try.

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Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 351C 4V

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