Previous Thread
Next Thread
Print Thread
Page 1 of 3 1 2 3
Front coil over guys. Need some advise #2095289
06/20/16 10:56 PM
06/20/16 10:56 PM
Joined: Jun 2003
Posts: 9,225
Charleston
S
sixpackgut Offline OP
Drag Week Mod Champion
sixpackgut  Offline OP
Drag Week Mod Champion
S

Joined: Jun 2003
Posts: 9,225
Charleston
Ok, so I have made changes to my car. And it doesnt work anymore.

Im wondering what weight spring you guys run in the front of your car. I would like to hear from race car guys at or under 3100lbs


Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram

performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
Re: Front coil over guys. Need some advise [Re: sixpackgut] #2095334
06/20/16 11:48 PM
06/20/16 11:48 PM
Joined: Oct 2013
Posts: 36
michigan
J
junior636 Offline
member
junior636  Offline
member
J

Joined: Oct 2013
Posts: 36
michigan
Are you talking about coil overs on stock or an aftermarket rack and pinion set up? The rack and pinion set ups seem to get away with lighter springs due to shock angles and the mounting points of the arms. Coil over conversions on stock stuff would be around a 450lb spring.

Re: Front coil over guys. Need some advise [Re: sixpackgut] #2095341
06/20/16 11:54 PM
06/20/16 11:54 PM
Joined: Jan 2003
Posts: 8,018
Tulsa OK
Bad340fish Offline
master
Bad340fish  Offline
master

Joined: Jan 2003
Posts: 8,018
Tulsa OK
Still no hook? How much travel do you have now with the coil overs? Calvert likes to see 5" of travel and that seems like it could be difficult with a coil over in the stock shock location.


68 Barracuda Formula S 340
Re: Front coil over guys. Need some advise [Re: Bad340fish] #2095343
06/20/16 11:56 PM
06/20/16 11:56 PM
Joined: Oct 2013
Posts: 36
michigan
J
junior636 Offline
member
junior636  Offline
member
J

Joined: Oct 2013
Posts: 36
michigan
Originally Posted By Bad340fish
Still no hook? How much travel do you have now with the coil overs? Calvert likes to see 5" of travel and that seems like it could be difficult with a coil over in the stock shock location.


Shouldn't be, I was building coil over kits for awhile and my kits had dead on 5" of travel at the spindle.

Re: Front coil over guys. Need some advise [Re: sixpackgut] #2095350
06/21/16 12:02 AM
06/21/16 12:02 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
Depending on the front weight... 350 would be close
or 400... put it on a scale
The length also matters
wave

Last edited by MR_P_BODY; 06/21/16 12:06 AM.
Re: Front coil over guys. Need some advise [Re: junior636] #2095352
06/21/16 12:05 AM
06/21/16 12:05 AM
Joined: Aug 2003
Posts: 43,097
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,097
Bend,OR USA
Most of the coil over and strut front end drag cars with four links or ladder bars cars I've heard of have three inches front travel confused

Last edited by Cab_Burge; 06/21/16 12:40 AM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Front coil over guys. Need some advise [Re: sixpackgut] #2095354
06/21/16 12:07 AM
06/21/16 12:07 AM
Joined: Jun 2003
Posts: 9,225
Charleston
S
sixpackgut Offline OP
Drag Week Mod Champion
sixpackgut  Offline OP
Drag Week Mod Champion
S

Joined: Jun 2003
Posts: 9,225
Charleston
Im at 4.75" of drop now. I only had like 3.5 before when the car was working.

I have a 300lb spring in it now and really dont have it compressed at all


Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram

performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
Re: Front coil over guys. Need some advise [Re: sixpackgut] #2095358
06/21/16 12:11 AM
06/21/16 12:11 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
Originally Posted By sixpackgut
Im at 4.75" of drop now. I only had like 3.5 before when the car was working.

I have a 300lb spring in it now and really dont have it compressed at all


Then put a 250 or 275 on it...the front must be light
but you will have to control the lift with good shocks
EDIT
more than likely your looking at a 6" spring in the
250-275 range... that will give you stored energy
and wont let it fall out... but again you will have to
slow it up on extension so you dont get full travel...
if it dont need the travel... but I would rather have to
much than to little
wave

Last edited by MR_P_BODY; 06/21/16 12:59 AM.
Re: Front coil over guys. Need some advise [Re: sixpackgut] #2095368
06/21/16 12:20 AM
06/21/16 12:20 AM
Joined: Nov 2004
Posts: 6,890
North Alabama
M
Monte_Smith Offline
master
Monte_Smith  Offline
master
M

Joined: Nov 2004
Posts: 6,890
North Alabama
Seldom is it how MUCH travel, it's usually RATE of travel. This is a moderate HP car, so while it won't need much travel, it will need some stored energy to get things started. So the issue is likely a combination of shock settings and the fact that the car is just sitting on the springs

Re: Front coil over guys. Need some advise [Re: Monte_Smith] #2095381
06/21/16 12:42 AM
06/21/16 12:42 AM
Joined: Jun 2003
Posts: 9,225
Charleston
S
sixpackgut Offline OP
Drag Week Mod Champion
sixpackgut  Offline OP
Drag Week Mod Champion
S

Joined: Jun 2003
Posts: 9,225
Charleston
Monte, thats exactly what Im thinking . I really dont know how to compare a /6 torsion bar to a coil spring


Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram

performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
Re: Front coil over guys. Need some advise [Re: sixpackgut] #2095383
06/21/16 12:43 AM
06/21/16 12:43 AM
Joined: Aug 2003
Posts: 43,097
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,097
Bend,OR USA
If you push up and down on the front of the car does the front of the car move up and down or is it stiff?

Last edited by Cab_Burge; 06/21/16 12:44 AM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Front coil over guys. Need some advise [Re: sixpackgut] #2095393
06/21/16 12:55 AM
06/21/16 12:55 AM
Joined: Nov 2004
Posts: 6,890
North Alabama
M
Monte_Smith Offline
master
Monte_Smith  Offline
master
M

Joined: Nov 2004
Posts: 6,890
North Alabama
Originally Posted By sixpackgut
Monte, thats exactly what Im thinking . I really dont know how to compare a /6 torsion bar to a coil spring
A torsion bar is a spring, so it has a spring rate............where to find that rate, I don't know. It also depends on how you mounted the shock. The more straight up, the less spring it needs

Re: Front coil over guys. Need some advise [Re: Monte_Smith] #2095403
06/21/16 01:01 AM
06/21/16 01:01 AM
Joined: Jun 2003
Posts: 9,225
Charleston
S
sixpackgut Offline OP
Drag Week Mod Champion
sixpackgut  Offline OP
Drag Week Mod Champion
S

Joined: Jun 2003
Posts: 9,225
Charleston
I guess the way the top mount piece comes out on the angle makes the shock more verticle. The front is very stiff, not like it was with the torsion bars. However, stiffer rebound setting on front shock was helping so I wasnt sure it needed to be loser


Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram

performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
Re: Front coil over guys. Need some advise [Re: sixpackgut] #2095419
06/21/16 01:29 AM
06/21/16 01:29 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
Originally Posted By sixpackgut
I guess the way the top mount piece comes out on the angle makes the shock more verticle. The front is very stiff, not like it was with the torsion bars. However, stiffer rebound setting on front shock was helping so I wasnt sure it needed to be loser


You said the shock compresses very little.. you
need lighter springs to get the shock down in farther
but stiffer shock setting... you had 3" before when you
lifted it up.. but now with the 300# your not working
thats because you dont have the 3" anymore.. you have a
lot of non stored energy... get the shock(rod) in farther
but be prepared to stiffen the shock rate to slow it down
wave

Re: Front coil over guys. Need some advise [Re: sixpackgut] #2095428
06/21/16 01:57 AM
06/21/16 01:57 AM
Joined: Jun 2003
Posts: 9,225
Charleston
S
sixpackgut Offline OP
Drag Week Mod Champion
sixpackgut  Offline OP
Drag Week Mod Champion
S

Joined: Jun 2003
Posts: 9,225
Charleston
Shock is compressed. Coil is not. I just ordered #250s.


Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram

performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
Re: Front coil over guys. Need some advise [Re: sixpackgut] #2095431
06/21/16 02:07 AM
06/21/16 02:07 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
Originally Posted By sixpackgut
Shock is compressed. Coil is not. I just ordered #250s.


This is a coil over shock correct... how do you
get the shock compressed and not the coil.. unless
the spring is way too short.. if thats the case like
I said a 6" at 250
wave

Re: Front coil over guys. Need some advise [Re: MR_P_BODY] #2095441
06/21/16 02:47 AM
06/21/16 02:47 AM
Joined: Jan 2011
Posts: 511
florida dade
C
cesar perez Offline
mopar
cesar perez  Offline
mopar
C

Joined: Jan 2011
Posts: 511
florida dade
my spring rate is 300 0r 350 and i have 3.75 inch of upword travel

Re: Front coil over guys. Need some advise [Re: MR_P_BODY] #2095523
06/21/16 10:23 AM
06/21/16 10:23 AM
Joined: Jun 2003
Posts: 9,225
Charleston
S
sixpackgut Offline OP
Drag Week Mod Champion
sixpackgut  Offline OP
Drag Week Mod Champion
S

Joined: Jun 2003
Posts: 9,225
Charleston
Originally Posted By MR_P_BODY
Originally Posted By sixpackgut
Shock is compressed. Coil is not. I just ordered #250s.


This is a coil over shock correct... how do you
get the shock compressed and not the coil.. unless
the spring is way too short.. if thats the case like
I said a 6" at 250
wave


When you compress the coil on a coilover shock then the shock extends and vice versa


Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram

performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
Re: Front coil over guys. Need some advise [Re: sixpackgut] #2095686
06/21/16 03:27 PM
06/21/16 03:27 PM
Joined: Aug 2003
Posts: 43,097
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,097
Bend,OR USA
Originally Posted By sixpackgut
Originally Posted By MR_P_BODY
Originally Posted By sixpackgut
Shock is compressed. Coil is not. I just ordered #250s.


This is a coil over shock correct... how do you
get the shock compressed and not the coil.. unless
the spring is way too short.. if thats the case like
I said a 6" at 250
wave


When you compress the coil on a coilover shock then the shock extends and vice versa
confused When I let my car down on the suspension the coil overs and spring compress, not extend shruggy They extend when I jack the car up and let the suspension hang down on of the coil overs, front or rear work

Last edited by Cab_Burge; 06/21/16 03:28 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Front coil over guys. Need some advise [Re: Monte_Smith] #2095721
06/21/16 04:15 PM
06/21/16 04:15 PM
Joined: Sep 2014
Posts: 4,457
Washington
M
madscientist Offline
master
madscientist  Offline
master
M

Joined: Sep 2014
Posts: 4,457
Washington
Originally Posted By Monte_Smith
Originally Posted By sixpackgut
Monte, thats exactly what Im thinking . I really dont know how to compare a /6 torsion bar to a coil spring
A torsion bar is a spring, so it has a spring rate............where to find that rate, I don't know. It also depends on how you mounted the shock. The more straight up, the less spring it needs




Seems to me that you can find the torsion bar rates in an old circle track chassis book. I have an old drag chassis book and I will look and see if it's in there.

I know I have seen the rates published.


Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
Page 1 of 3 1 2 3






Powered by UBB.threads™ PHP Forum Software 7.7.1