Rear coil springs...

[Scott S.]

I've been tossing around the idea of upgrading my rear springs. Montelishi's starting to sag a bit since I got her.

Been going through the old posts and there were a few articles regarding using El Camino springs, (Moog cc507). 

Was just wonder if those of you who did the swap are still happy with the results you got ??? 

Scott.

[420ponies]

I'll have a pair to get rid of soon. Been on my car for the last 8 yrs? Moog Vari Rate springs. Best upgrade to the suspension since I owned the car. I'm upgrading to coil over and these will be available in the near future. PM me if interested.

[Scott S.]

Hey James,

So you liked them ???

I'd probably be interested...... Depending on what kind of shipping fees are involved. $$$$ !!!

I'll keep you in mind.

Scott.

[alain boileau]

🙂Depends which look you are going for

Factory look stay with original coils .More custom look go with a different coil

Remember if you modify it may affect road manners of vehicle

Alain🙂

[Scott S.]

Hey Alain,

I'm trying to maintain something fairly stock, but with all the weight I keep in the trunk, Montelishi's definitely riding about 1 1/2"-2" lower at the back then when I got her.

Not sure if it's just age, or swapping in the 12 bolt may have effected this, but she sits "front end high".

I'd like to get a bit more clearance at the back tires too, just incase I upsize them. 

Scott.

[Scott S.]

Before.

After.

And NO !!! It's NOT because I'm a "Big Guy" 

[Chevy Dave]

My  first choice would be to use the Moog Cargo Coils, they are progressive and become stiffer as you load more weight in the trunk.  The ride height should be stock. Another solution is to install air shocks and use only enough air pressure to level the car based on the load.

 

 

 

 

 

 

 

[Michael Boyte]

Wow, that is a lot !! I'm going to have to go with the Big guy theory 😂 sorry !

[Grant MacPherson]

Used moog cargo coils 50 years ago in my 71 and when I  bought my 70 SS 5 years ago used them again. Ride height works perfect with the ALC on the SS's.

[alain boileau]

🙂Did you or previous owner put big block coils on the car?

Small block and big block coils are different 

Alain🙂

[Robnhood]

16 hours ago, 420ponies said:

I'll have a pair to get rid of soon. Been on my car for the last 8 yrs? Moog Vari Rate springs. Best upgrade to the suspension since I owned the car. I'm upgrading to coil over and these will be available in the near future. PM me if interested.

Just out of curiousity what were you thinking about for coil over?

[Scott S.]

19 hours ago, Chevy Dave said:

My  first choice would be to use the Moog Cargo Coils, they are progressive and become stiffer as you load more weight in the trunk.  The ride height should be stock. Another solution is to install air shocks and use only enough air pressure to level the car based on the load.

 

 

 

 

 

 

 

Montelishi had air shocks when I bought her, but they were shot.

Still sat that high with them broken, so I'm thinking springs. 

The second picture is after I installed KYB shocks. 

[Scott S.]

9 hours ago, alain boileau said:

🙂Did you or previous owner put big block coils on the car?

Small block and big block coils are different 

Alain🙂

Hard to say what the previous owner did...... She was a bit of a Frankenstein when I got her.

But according to the V.I.N. she is a 350 cid car and has a 350 cid in her. 

[alain boileau]

🙂So to bring the car to original ride height

I would go with the standard suspension coils.

Which should bring the car back to original height.

You would like a little bit better ride and handling medium gas shocks and a rear sway bar

This should help a lot.This is my 2cents worth

Alain🙂

[72 Monte Carlo]

22 hours ago, 420ponies said:

I'll have a pair to get rid of soon. Been on my car for the last 8 yrs? Moog Vari Rate springs. Best upgrade to the suspension since I owned the car. I'm upgrading to coil over and these will be available in the near future. PM me if interested.

James, PM sent.

I have a brand new set of Monroe air shocks in the rear of my 72, but I have to air them all the way up to get the muscle car stance. I know my coil springs are the OEM factory 1972 it came with from the factory, but I definitely need a newer set that will give me more height, so I don't have to air the shocks all the way up. 

 

[420ponies]

Sorry, they are already spoken for. I have ran these coil springs with air shocks ( at 25 psi ,so they work ) , and the coil springs bring the car just a little above level. But the big thing is that the more weight in the trunk , no sag. Plus they ride the same with or without the extra weight.

Edited October 31, 2024 by 420ponies
added content

[420ponies]

Just to be clear on what we are talking about. MOOG moog-cc507 . These are the Vari-Rate rear coil springs.

[Chevy Dave]

Some members have used CC501, what is the difference between them and cc507?

[Scott S.]

The "501" is 1 1/3" shorter unloaded, and 1/2" shorter loaded...... 

[jft69z]

2 hours ago, Chevy Dave said:

Some members have used CC501, what is the difference between them and cc507?

Spring rates, free height, compressed height, etc

CC501

CC507

[Chevy Dave]

Which one will give you a level ride?

[Scott S.]

With 2" difference in loaded height, I'm thinking that the 501's will be closer but a bit stiffer...... 

[Scott S.]

41 minutes ago, jft69z said:

Spring rates, free height, compressed height, etc

CC501

CC507

Hi Joe,

 Thanks for the specs..... The info I'd found said that the 507's had a loaded height of 8.5". Good to know that they're actually 10".

[Scott S.]

22 hours ago, alain boileau said:

🙂So to bring the car to original ride height

I would go with the standard suspension coils.

Which should bring the car back to original height.

You would like a little bit better ride and handling medium gas shocks and a rear sway bar

This should help a lot.This is my 2cents worth

Alain🙂

Hey Alain....

It's 3 cents here in Canada, could go higher depending on the exchange rate.

I'm actually looking to give it a bit of a boost/rake in the back. I notice the sag when driving it the way it is now. Like the feel of a raised rear. 

Thanks.

[alain boileau]

🙂Ok Scott I am a die hard OE restoration guy that is just me.'Any restoration done properly will look great.

Whether it is day2 or original there is no wrong way to restore a car

If you take your time Remember it is your vision of said vehicle.

I start project with a bare frame but when I look at the frame I see the completed restoration

Just my 3cents CDS

Alain🙂