I am looking at getting some new leaf springs for my challenger. I was looking at the Mopar Heavy Duty (Same as the stock 6/7 leafs on Heave Duty Cars) or the Super Stocks which i do not know much about. Does anyone have any input on these parts and/or pics of the difference from stock to them?

Thanks,

Steve

The "Extra Heavy Duty" springs are stock length with a 22" front spring segment. They are a bias design with one side stiffer to compensate for torque reaction but don't make the car noticably "tilted" at rest. As originally designed they put the rear somewhat low. The reproductions have a reputation of sagging after a fairly short time and tend to put it really low. I'm running a set on a Challenger set up for handling and want it a little low. The XHD's are still a little too low for me and I'm going to get them re-worked by the local spring shop to stiffen them and add 1/2-3/4" height.

The "Super Stock" springs are designed for drag racing and have a shorter 20" front segment. They require an extended front hanger to compensate for the short length. They are quite stiff and heavily biased to the point the car may look like its leaning at rest. Some folks buy two right hand springs to gain the stiffness without the tilt for road use.

You can see pics and get more description on Mancini's web site.

There are lots of choices and several vendors. It depends on what you want to do with the car. If you want standard length springs that aren't too low, I'd call ESPO or Firm Feel.

ss springs will be quite stiff for a street car,but are good and will not sag

My 65 dart came as a roller w SS 003's on both sides & not up & running yet but they look stout w a healthy bow which required shock extensions. I got a feeling I'll have 2 swap em out

If you go with SS springs I would recomend the 3400 pound springs, the spring rate is a little less IE not so stiff.

Buy em from Spring's and Things(ESPO). I think that's what there called. Either standard height or 1 or 2" over. They don't sag and have held up good for me on 2 challengers.I would not trust much from MP anymore and not springs for sure.
If you want a drag car that sits funny go with the super stock springs from MP with longer front hangers.

Welcome back...

Maybe call Eaton Detroit Spring and see what they have. I was happy with the stock reproduction springs I got from them.

Any car I've ever had with SS springs rode like an empty dump truck on the street.

Thanks for the input guys, I'll have to check out these other places, seems like i keep hearing the same feedback on the MP springs being junk after time.

Steve

needless to say; the SS springs reside in my "paid a bunch of money for stuff that is never going to get used" pile!



Dave

I have XHD's on my '74 Challenger. They are ok. No real complaints.

I had the 3800 lb automatic superstocks grafted onto my Volare for about 30 years. They did their job at the track, and I was surprised how well the car still handled. They never sagged. It was a little work to get the car to sit level from left to right. I had the complete police suspension on the Volare for a couple years and that handled really well. So I would know the difference.

I don't know why everyone bashes superstocks. There is more to suspensions and ride quality than springs alone.

ESPO, ESPO, did I mention ESPO? Get their 6 leaf stock height or +1 if you want a little more. Good quality and no sag.

3400 lb SS springs on my 63 I bought from Mancini. And it dont ride like a dump truck. It rides great and hooks good at the track for the rest of the suspension being stock. I would bet it rides as good as any Mopar on HD leaf springs. It dont bounce all over it just rides normal. Ron

I have SS springs on my Cuda and they ride just fine.