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Old 09-08-2010, 07:25 PM
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need advice on rear coilovers on prostreet nova

i have a prostreet nova that never hits the track anymore, looking for a way to soften the rear suspension . it is to stiff to drive on the road, i tried turning the damper down on shocks but no good spring just to heavy, also need some type of poly or rubber in heims on shocks any ideas?

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Old 09-08-2010, 07:37 PM
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I wouldn't worry about poly or rubber for the end links of the shocks, just get springs with the correct rate will do wonders. Most drag cars are typically oversprung.

Do you know the vehicle weight?? Even better would be just the rear weight.
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Old 09-09-2010, 05:55 AM
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i think i scaled bout 1500 lbs rear only and run 300 lb springs with monroe matic shocks, seems to ride ok for the street (64 nova pro street)
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Old 09-09-2010, 03:11 PM
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car is a 69 not sure of the weight but i can check on that . thanks for the advice
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Old 09-09-2010, 11:58 PM
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Competition Engineering has a chart for rear weight and spring choice. 300lbs on a 1500lb rear weight is double what it should be, correct spring would be 130-150lbs area. For reference the stock '68-74 Nova rear spring was in the 140-160lb rate.

THERACER, you are probably getting more spring action out of the big balloony tires than you are out of your rear shock/spring combo, your springs are extremely stiff for that light a weight, I don't even have 300lbs springs in the front of mine.
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Old 09-10-2010, 05:30 AM
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ericnova72 , it does ride a little stiff, but not bad. it soften up a little when i put the monroe matics on.
those are the springs chris alston sent with the back half kit for that car (64nova) ? im pretty sure they were 300 lb, im still trying to find the little metal tags that were on them , ill confirm . im curious now .
thanks eric.

roger
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Old 09-10-2010, 06:34 AM
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ericnova72 , your right, the fronts are 300lbs and my backs are 200 lbs
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Old 09-16-2010, 09:48 AM
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Eric is right.... commonly coil overs cars are typically way oversprung causing a bad ride quality. In fact more often than not I see them oversprung to the point where they will not even preload the coil an inch or two and still riding at the top of the shock / coil. The only thing you are going to do at that point to get a good ride quality is to get a goodhigh quality spring and shock combo. and yes.... there is huge differences in coils and you get what you pay for! By some cheap overseas spring and you will end up with a spring with an inconsitant rate and will have an steeper inclinating rate long before it gets to coil bind. A high quality spring with a good cold wound high tensil wire will remain consistant and linear through a wider compression band and it will have a considerably smaller wire diameter so you get more spring compression before it nears coil bind. The second part of the equasion is to use a high quality shock, preferably a monotube construction. If you get it right, you will not be able to notice the difference between teflon or kevlar heim ends or poly bushings... other than you wont be replacing worn out or torn poly bushings.
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Old 09-16-2010, 10:30 AM
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thanks tony, good info
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Old 09-16-2010, 10:52 AM
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I run 130lbs on my nova, but S&W recommended 150 for the strip. I chose 130 since I wanted it on the street and it just felt better. It is a ladder bar and wishbone setup with metal heims and shear washers.
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