Rear Suspension Question

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321Scamp

321Scamp

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I am looking at changing up the rear suspension. I want to keep the car from squatting under hard acceleration and maybe even stand up when you punch it while you are cruising. Getting it to stand up is probably a HP thing. Can this be done with springs, shocks, pinion snubber, or all of them? I really don't want to jack up the rear and also would like a mostly comfortable ride. It is a cruiser not drag car, so to speak, if you get what mean. Hope this makes some sense. Looking at longer air shocks for rear and/or helper springs for the shocks or springs right now.

Thanks
 
IMHO a new stock set up will get you 95% of the way to where you want to be. Get some new HD springs from Mopar (not SS springs), a pinion snubber and a fresh set of quality shocks.
 
I run a triangular 4 link from air ride. The air bag set up is pricey but gives a lot of adjustability for any type of ride you are looking for. If you do decide to go this route let me know and I will fill you in on the dos and donts.
 
Just an adjustable snubber and some 90/10 front shocks should do what your looking for. If your trying to raise the ride height maybe add new leaf springs in rear.
 
321Scamp said:
I am looking at changing up the rear suspension. I want to keep the car from squatting under hard acceleration and maybe even stand up when you punch it while you are cruising. Getting it to stand up is probably a HP thing. Can this be done with springs, shocks, pinion snubber, or all of them? I really don't want to jack up the rear and also would like a mostly comfortable ride. It is a cruiser not drag car, so to speak, if you get what mean. Hope this makes some sense. Looking at longer air shocks for rear and/or helper springs for the shocks or springs right now.

Thanks
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Do you have a pinion snubber?

Honestly, and others will correct me if Im wrong, but it doesn't take any fancy high dollar suspension for a high power Mopar to launch like that. A correctly adjusted pinion snubber will eliminate almost all squat.

I would suggest drag shocks and 6 cylinder torsion bars but you stated you want a normal ride height and a nice ride.

I would go with my above suggested rear suspension and a budget (cheep) front shock that well control the front movement in normal driving but will be just crappy enough to let the front end come up easy during a hard launch.
 
fwaugh said:
I run a triangular 4 link from air ride. The air bag set up is pricey but gives a lot of adjustability for any type of ride you are looking for. If you do decide to go this route let me know and I will fill you in on the dos and donts.
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reilly motorsports will sell that kit with coilovers.. saves allot cash.....
 
SS springs would give it a harsh ride in lower speeds won't it?
 
i had SS springs on my demon years ago and i liked the ride...


there is gonna be a comprimise any way you go... you need to decide what exactly you want to do with the car and go with that.
 
I am fabing up my own pinion snubber, what is a good distance for the body to the rubber bump stop at static condition? The way I have it now, before modifications to adjust, will put it .50" away. I have another bump stop for it also that will put it a 1" away. But that may be close for the suspension travel. Any thoughts?
 
When I had the pinion snubber set up right for the track, it was to close to the floor for driving on the street and killed the floor of the car. So when on the street I had it backed off and didn't work as well. So you will have to find a distance that works well for street and track. Nice ride on the street and it won't work right. For the track I had 3/8" space and at an inch for street, and it would hit the floor on occasion.
I personally like the ride of the SS springs. The thing I didn't like as much was the car sits a little bit of an angle from side to side, but I bet that guy in the Video has SS springs with a snubber set up close to the floor
 
321Scamp said:
And my car has had air shocks on it for 20+ years and there are no problems with the shock mounts.
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That is probably only because it does not have enough power and traction to do the damage. The weak links are exposed only when added power and traction starts causing breakage.
 
Ace said:
That is probably only because it does not have enough power and traction to do the damage. The weak links are exposed only when added power and traction starts causing breakage.
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i had slant six springs and air shocks on my dart for years and years... had a stout 340 in it for a long time and now the 360. it pulled 1.69 60' times and got an inch of air under the tire with them and nothing ever broke..... i always hear about the shock mounts breaking with air shocks.. i have seen too many cars with them and not have any problems to believe that old wives tale....
 
Joe, Post the picture of your cars launch with the new rear suspension.

Its bad *** !
 
lol.. here ya go... 1.63 60' times with it... triangular 4 link set up..

dartlaunch2.jpg


dartlaunch2.jpg


dartlaunch2.jpg
 
here is the stock suspension.. 100,000 mile slant six springs and air shocks.... 1.69 60' times...


dartlaunch.jpg


dartlaunch.jpg


dartlaunch.jpg
 
It all depends on what happened at the factory. Evidently you got a good one. One bad spot weld and the upper shock mounts will give way under hard use like pictured. I've used air shocks one several Mopars in the past that never had the problem. It's just not a good idea when better alternatives are available.
 
This is probably a stupid question, but can't you put on two of the rights or lefts springs so that you have an level rear?
 
Of course, but that would defeat the purpose of why the springs are different in the first place.
 
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