info on leaf springs

87fox72mach

Well-known member
Joined
Apr 22, 2011
Messages
818
Reaction score
5
Location
pa
My Car
1995 firebird rebuilt motor 5 spd dail driver
1987 grand wagoneer plow truck
1987 mustang lx 5.0 work custom engine bay and paint
1972 mach 1 project
Ok im looking at new leafs but i cant find any clear reccomendation for what i want for my car. 72 q code going to have about 450 horse nice weather cruiser and show car . I want the rear end of the car to be slightiy higher than frnt to give it that old school look! Any input im looking at cjs 4 leaf replacement but not sure of stance.

 
Last edited by a moderator:

Austin Vert

Benefactors
Joined
Jul 27, 2012
Messages
2,877
Reaction score
74
Location
Brisbane - Australia
My Car
1973 Mustang Convertible
I installed new 5 leaf springs with a standard eye shakle bolt setup.This raised my rear end up nicely and gave me that raked look that you're after.

Greg:)

 

Kermit 460

VIP Members
Joined
Dec 13, 2012
Messages
906
Reaction score
3
Location
Maine
My Car
73 Mach 1 460 crites headers,summit cam ,edelbrock dual plane hi-rise intake,edelbrock 780 carb,C-6 trans,Pertronix flamethrower 2 billet distributor & coil
Ok im looking at new leafs but i cant find any clear reccomendation for what i want for my car. 72 q code going to have about 450 horse nice weather cruiser and show car . I want the rear end of the car to be slightiy higher than frnt to give it that old school look! Any input im looking at cjs 4 leaf replacement but not sure of stance.
Sounds like you're trying for the same look I am.I have not put mine in yet,but I went with 429 springs,extra front clamp to help with spring wrap up,1" longer shackle kit from M.U. I know just new springs will be a perk up from the tired originals,but I figured I'd try the 1" longer shackles & if it was too much,I could just use the new bolts & bushings in the original shackles.

 

87fox72mach

Well-known member
Joined
Apr 22, 2011
Messages
818
Reaction score
5
Location
pa
My Car
1995 firebird rebuilt motor 5 spd dail driver
1987 grand wagoneer plow truck
1987 mustang lx 5.0 work custom engine bay and paint
1972 mach 1 project
Any pictures austin? I keep hearing 5s will be a much rougher ride on the street

 

Austin Vert

Benefactors
Joined
Jul 27, 2012
Messages
2,877
Reaction score
74
Location
Brisbane - Australia
My Car
1973 Mustang Convertible
Rake 2 - l.jpg Rake 4 - .JPG Hi 87 Fox,

See my pics as you requested. Yes, the 5 leaf setup does give you a firmer, stiffer ride, but not enough to cause conflicting problems that you can't put up with. I must say though, that i installed a rear sway bar as well but ended up taking it off as it made the ride way too stiff and hard.Watch out for your choice of rear shocks as well. I went for a Pedder's brand standard gas shock.(not factory standard). I tried KYB sports shocks and took them off as they were way too hard a ride as well. (Rear wheels - 295/50/15 Mastercraft on 8x15 Magnum 500's.) With the sports shocks, and rear swaybar combo, and the 5 leaf all together, i would have ended up needing back spinal surgery as she was a real bone jarrer!

I'm happy with my ride now. (Not too hard, not too soft.) Giddyup, Lil' Pony!::beer::

Thanks,

Greg:)

Rake 1 - .jpg

Rake 3 - .JPG

 
Last edited by a moderator:

mustang7173

VIP Members
Site Supporters
Joined
Sep 7, 2011
Messages
2,027
Reaction score
31
Location
Wake Forest, NC
My Car
1971 Sports Roof Fastback (early model)
1973 Coupe -Under rebuild/restore
Hello 87fox72mach.

According to this book, How to Make Your Car Handle by Fred Puhn, It is recommended to replace the leaf springs with the same rate and load. If you want to lower or up the height, then you would choose the front mounting eye, either upwards per factory, straight line or reversed. The area to improve on is the sway bar and shock absorbers. I would recommend checking out Eaton Detroit Springs. They have some darn good information regarding front and rear springs.

How to Make Your Car Handle by Fred Puhn: http://books.google.com/books?id=cr4IyD5l1NQC&source=gbs_similarbooks

Eaton Detroit Springs

http://eatonsprings.com/64-73mustangrear.html

mustang7173

 

Kermit 460

VIP Members
Joined
Dec 13, 2012
Messages
906
Reaction score
3
Location
Maine
My Car
73 Mach 1 460 crites headers,summit cam ,edelbrock dual plane hi-rise intake,edelbrock 780 carb,C-6 trans,Pertronix flamethrower 2 billet distributor & coil
Hi 87 Fox,

See my pics as you requested. Yes, the 5 leaf setup does give you a firmer, stiffer ride, but not enough to cause conflicting problems that you can't put up with. I must say though, that i installed a rear sway bar as well but ended up taking it off as it made the ride way too stiff and hard.Watch out for your choice of rear shocks as well. I went for a Pedder's brand standard gas shock.(not factory standard). I tried KYB sports shocks and took them off as they were way too hard a ride as well. (Rear wheels - 295/50/15 Mastercraft on 8x15 Magnum 500's.) With the sports shocks, and rear swaybar combo, and the 5 leaf all together, i would have ended up needing back spinal surgery as she was a real bone jarrer!

I'm happy with my ride now. (Not too hard, not too soft.) Giddyup, Lil' Pony!::beer::

Thanks,

Greg:)
Love the rear view of those back tires,Greg, BEEFY !:cool:
 

87fox72mach

Well-known member
Joined
Apr 22, 2011
Messages
818
Reaction score
5
Location
pa
My Car
1995 firebird rebuilt motor 5 spd dail driver
1987 grand wagoneer plow truck
1987 mustang lx 5.0 work custom engine bay and paint
1972 mach 1 project
Agreed those pics are sweet love the stance !

 

Austin Vert

Benefactors
Joined
Jul 27, 2012
Messages
2,877
Reaction score
74
Location
Brisbane - Australia
My Car
1973 Mustang Convertible
Thanks very much Kermit and 87 for your kind words. It means a lot.

I don't know if the word raked is used in America any more to describe a car that has the rear jacked up higher than the front. I seem to recall that word being in vogue many years ago.(Starsky & Hutch's Torino/ Sixties TV Batmobile/Aloha Bobby & Rose Camaro to name a few good lookers from the past)

Anyway, iv'e always liked and preferred American cars with that high end stance. I think it's a real cool look indeed.Hope my feeback helped and thanks guys again.

Greg:)

 

jeff8877

VIP Members
Joined
Feb 3, 2013
Messages
1,233
Reaction score
33
Location
So Cal
My Car
1972 Q Code Convertible
Greg...great looking car with a nice "rake". I am in the same boat trying to figure out what rear setup to go with on my Mach. Which KYB's did you try that were too stiff?

Jeff

Thanks very much Kermit and 87 for your kind words. It means a lot.

I don't know if the word raked is used in America any more to describe a car that has the rear jacked up higher than the front. I seem to recall that word being in vogue many years ago.(Starsky & Hutch's Torino/ Sixties TV Batmobile/Aloha Bobby & Rose Camaro to name a few good lookers from the past)

Anyway, iv'e always liked and preferred American cars with that high end stance. I think it's a real cool look indeed.Hope my feeback helped and thanks guys again.

Greg:)
 

Austin Vert

Benefactors
Joined
Jul 27, 2012
Messages
2,877
Reaction score
74
Location
Brisbane - Australia
My Car
1973 Mustang Convertible
Hi Jeff,

Thanks for your kind words also. I bought KYB Gas Adjusts all round but found them too hard for my personal liking.I think the main thing to bare in mind here is that when it comes to the ride, it comes down to a personal preference thing. We all know that it's a trade off between handling and ride.I made the mistake of going crazy on the hanling side and so sacrificed ride. ( too hard). My Mustang handled like a dream around corners, but felt like i was driving a cement mixer. I had to go back to the start again and rethink the whole thing through from scratch.

Some guys prefer a soft ride while others want and don't mind a firmer, harder ride.

Unfortunately, i think one has to experiment until you find what suits yourself in that regard. It took me a fair amount of money and time with different combinations before i ended up being happy with both my handling and ride together. You can read books and take all the advice in the world, but in the end, it's how happy and satisfied you are with your suspension that matters.

By the way, i used rubber shackle bushes and not poly when i set up my 5 leaf rear springs.

Thanks,

Greg:)

 

jeff8877

VIP Members
Joined
Feb 3, 2013
Messages
1,233
Reaction score
33
Location
So Cal
My Car
1972 Q Code Convertible
Thanks Greg...the info helps. Will probably steer away from the gas adjusts as I have seen several others say they are too stiff.

Jeff

Hi Jeff,

Thanks for your kind words also. I bought KYB Gas Adjusts all round but found them too hard for my personal liking.I think the main thing to bare in mind here is that when it comes to the ride, it comes down to a personal preference thing. We all know that it's a trade off between handling and ride.I made the mistake of going crazy on the hanling side and so sacrificed ride. ( too hard). My Mustang handled like a dream around corners, but felt like i was driving a cement mixer. I had to go back to the start again and rethink the whole thing through from scratch.

Some guys prefer a soft ride while others want and don't mind a firmer, harder ride.

Unfortunately, i think one has to experiment until you find what suits yourself in that regard. It took me a fair amount of money and time with different combinations before i ended up being happy with both my handling and ride together. You can read books and take all the advice in the world, but in the end, it's how happy and satisfied you are with your suspension that matters.

By the way, i used rubber shackle bushes and not poly when i set up my 5 leaf rear springs.

Thanks,

Greg:)
 

droptop73

VIP Members
Staff member
Moderator
Joined
Jul 5, 2010
Messages
6,390
Reaction score
181
Location
Grand Rapids, MI
My Car
73 Convertible
I just put the Gas A Just shocks on my car with stock springs and the ride is firm but I would say far from harsh. I could see the ride being harsh with stiffer springs though. I drove it today for the first time for any kind of distance with the new shocks and love the ride, even on crappy Michigan roads.

 
Last edited by a moderator:

sharpstang72

Well-known member
Joined
Apr 3, 2011
Messages
111
Reaction score
0
Location
MD
My Car
1972 Mustang Convertible
351C 2v, 4bbl,FMX, 9" Rear 3.50 gears
Hey guys, I need to replace my 40 year old leafsprings as the ride seems to be getting bouncier. Any recomendations? I want to use 5 leaf and keep the stock height, but a lot of people say the car will rise a little with new leafsprings. I like the low profile look now because the old leafsprings are saggy, so I was told to order them with one inch drop and standard shackles. Any idea's if that makes sense? Any difference going for 5 leafs instead of 4? Any particular brand? I heard Scott Drake is good.

Thanks,

 

CZ-75

Benefactors
Joined
Jan 14, 2013
Messages
1,547
Reaction score
8
Location
Ohio
My Car
1973 Convertible 351c 2V
I recently changed out my 40 year old sprimgs with new JLS (I think it was JLS?) 4-leaf springs, and doing so raised my rear end a little more than 2 inches... But my car had a severe case of the rear end droop. I was bottoming out on small bumps. So I may have been saging more than yours to begin with.

 

73vertproject

VIP Members
Joined
Aug 7, 2010
Messages
5,074
Reaction score
7
Location
McDermitt, NV
My Car
1973 Convertible H Code, 351C 2V FMX
Hey guys, I need to replace my 40 year old leafsprings as the ride seems to be getting bouncier. Any recomendations? I want to use 5 leaf and keep the stock height, but a lot of people say the car will rise a little with new leafsprings. I like the low profile look now because the old leafsprings are saggy, so I was told to order them with one inch drop and standard shackles. Any idea's if that makes sense? Any difference going for 5 leafs instead of 4? Any particular brand? I heard Scott Drake is good.

Thanks,
I got mine as a kit from Laurel Mountain Mustang and I'm happy with them and the price.

Doc

 
Top