Here's my concern old v. new



thanks

 

Whats the specs or brand of the new one?

 

MOOG 5758--that's all I have and the vendor's annotation that it fits a 69 sb w/o ac.

 

Spring rate is 474, so maybe I am ok--another member sstopczy thought I would be ok with this. I was quite surprised by the difference in height, but can see the shorter spring is a thicker coil.

Thanks,

 

Replied in other thread. Nothing to worry about. You will like the new springs.
Mike

 

Just installed my a-arms and springs today. My springs are 550 lb springs and also much shorter. Makes the reinstall easier.

 

How is the ride and handling with the 500 lb spring? Compared to what you replaced? I need to replace mine and have considered the 500 lb set up. thanks

 

Wish I could answer your questions but car is still jacked up. Still got to install the new borgeson steering system and re-install all steering parts before she is ready to drive. I did a lot of research on spring rates before deciding on the 550. Some say it rides too rough while others say it's just fine. I'll probably come out somewhere in the middle of these opinions. That's ok as I don't mind a little rougher ride.

Jim

 

It's quite common for higher rate replacement springs to be shorter than the stockers out of the car. Judging from the pic's, the replacement wire size if definitely bigger than the originals. Just make sure these aren't marketed as lowering springs, if not what you're wanting. Unfortunately, some of these will change the ride height a bit anyway, so maybe have to cut a bit off, or add a a spacer on top. Your pic, also shows someone tried to put some band aid boosters in the originals.

 

Thanks to all for the help. I will let you know how it all turns out, but won't be for awhile.

 

I had what most now seem to call 'long tube' headers with the base SB springs. It was like riding on Cloud 9. But the collectors scraped the macadam on only slightly rolling secondary roads. I replaced with the F41 front and rear and Koni shocks...I also switched to sidepipe headers at the same time.

It rides like the proverbial stonepile but is totally flat when cornering.

 

I bought 550# spring for my front. It lowered front about 1" and I love the ride. Others say ride it is too stiff, so it's realitive. How are the roads in your area? If roads are good, you should like. If roads are bad then it may beat you to death. Like others have already said, the shorter spring is SOOOOO much easier to install. I wrestled with getting the stock springs back in using a spring compressor. The 550s went right in -- no spring compressor needed.

 

Difference between the 460# and 550# is minimal. I've driven cars with the base setup (~300# front) and it's HUGE. The base cars ride very very smoothly. The 550# setups(gymkhana, ~550fr/300rr, a little variance depending on year and configuration) are more like a typical sports car. Not godawful, but firm and certain roads will upset you.

 

Moog 5758 sring webesite says; Coil Spring Dimensions:
OD 3.825 , wire dia. 0.656, install height 10.00, load 1400, spring rate 474, free height 12.94

I got mine from Summitt for about $50 when I did my front end. After the car was aligned it was a pleasure to drive. Smooth, lowered the ride height, no bounce, flat in the turnes and no tire nose.

The front end job should have been the second job on the car after brakes.

 

[QUOTE=bhk2;1579925015]Here's my concern old v. new



after installation, the spring on left side is catching the frame and making unpleaseant noises. It iis seated correctly on lower ca, upper ca looks pretty close but not centering through hole.

Do I separate ball joint from steering knuckle to reset spring or is there another way to go?

Guessing that is why the previous spring had those spacers.

 

When the lower is still loose put the shock on.

This will help center the spring and let you know all is well.

Ralph

Why does Summit say the MOOG 5758 will not fit a 75?

 

I replaced my gymkhana OEM front springs a few years ago with 550's 1 inch shorter than stock. The new springs lowered the front end about 1 inch which was great. The ride is very good even with the 550's especially with the Bilstein HD's in the front-by far the biggest improvement in ride besides totally soft springs would be shocks-Bilsteins-They dramatically improved the ride with the OEM springs. The other 2 BIG improvements to the ride and handling were:

1. BETTER tires than the crap 15's offered with the OEM rims. I run 255/45/17 SLP rims with ZR ultra high performance summer only tires.

2. All these cars need a front spreader bar between the upper control arms to stop frame flex which will dramatically improve the ride and handling-no more shaking on rough roads-This with 550 springs and Bilstein HD's along with 255/45/17 ZR tires! I use speedirects front spreader bar with the OEM mechanical fan.

I have a host of other items that are BIG mprovements over the OEM suspension both front and rear, and people who own C3's that have ridden in my car cannot believe that it rides like it does with a taut firm ride that is NOT jarring with outstanding handling.



Hope that helps!

 

550lb springs with 1/2 coil cut... Perfect:-)

 

Are you the original owner of the car?

A gymkhana 78 would have 550s stock. Someone put the 460# spring in my 78 when the front suspension was rebuilt back in the early 90s.

 

"2. All these cars need a front spreader bar between the upper control arms to stop frame flex which will dramatically improve the ride and handling-no more shaking on rough roads-"

What is this Front spreader bar your talking about?

Nice looking ride.. You have great taste.

Ralph