progress CS-II Coilover Spring rate
01-30-2014, 08:45 AM
#1
progress CS-II Coilover Spring rate
Looking for some quick opinions. I read the website and I'm pretty sure I'm in the 350/350 spring rate range. I do, on occassions, drive this car to work though. Which is only 2 miles or so, but the roads aren't very smooth. Would I still be okay with 350/350 or should I step it down to 350/250?
The car is a 1989 hatchback, boosted B16A, intended purpose is drag racing. I don't care for any particular look, but I do want some decent, entree level, performance coilovers.
Thanks
http://www.progressauto.com/products.../productID/778
The car is a 1989 hatchback, boosted B16A, intended purpose is drag racing. I don't care for any particular look, but I do want some decent, entree level, performance coilovers.
Thanks
http://www.progressauto.com/products.../productID/778
STREET PERFORMANCE:
These kits use 350# front and 250# rear springs. This calibration rides well on uneven road conditions if set up at a reasonable ride height around 1.0 in. to 1.5 in. less than OEM. Expect a dramatic improvement in handling capability and steering response. This is the choice for sport-tuned "daily drivers".
STREET-SPORT
These kits use 350# front and 350# rear springs. This calibration is more aggressive and transitions faster for the "sport" driver. Expect a dramatic improvement in handling capability and response, and some reduced ride quality. This is the great choice for "street and track day" multi-use vehicles, and vehicles driven hard on better (smoother) roads.
These kits use 350# front and 250# rear springs. This calibration rides well on uneven road conditions if set up at a reasonable ride height around 1.0 in. to 1.5 in. less than OEM. Expect a dramatic improvement in handling capability and steering response. This is the choice for sport-tuned "daily drivers".
STREET-SPORT
These kits use 350# front and 350# rear springs. This calibration is more aggressive and transitions faster for the "sport" driver. Expect a dramatic improvement in handling capability and response, and some reduced ride quality. This is the great choice for "street and track day" multi-use vehicles, and vehicles driven hard on better (smoother) roads.
01-30-2014, 09:30 AM
#2
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Re: progress CS-II Coilover Spring rate
350/350 is 100% fine.
my ef is only lowered by 1.5" with the csII kit.
the wife and i have taken the car out on date nights, midnight drives on curvy & bumpy roads.
wify approved.
we are considered old too.... 31.. lol
my ef is only lowered by 1.5" with the csII kit.
the wife and i have taken the car out on date nights, midnight drives on curvy & bumpy roads.
wify approved.
we are considered old too.... 31.. lol
01-30-2014, 10:08 AM
#4
Re: progress CS-II Coilover Spring rate
I run the AutoX kit on my EF 500/350. It makes the car feel solid.
I also have a 350/200 on my integra. A very nice ride. I don't race the integra.
Also, if Charlie is old then I must be ancient....46... lol.
I also have a 350/200 on my integra. A very nice ride. I don't race the integra.
Also, if Charlie is old then I must be ancient....46... lol.
01-30-2014, 10:20 AM
#5
Re: progress CS-II Coilover Spring rate
I'm honestly open to spring rate suggestions. I thought 350/350 would be a good start. It is for 'drag racing' mostly. So I think a higher rear would help keeping the nose down during launch. Cornering aspects are NOT nearly as important to me.
EDIT: Had to add the not portion.
01-30-2014, 10:44 AM
#6
Re: progress CS-II Coilover Spring rate
Stiffer rear rates are better for drag racing I think because they result in the chassis responding quicker to weight transfer. I'm not sure if extra compliance in the front helps anything although Progress recommends 350/500 for drag racing (with the CSIIs).
However I think for DD 350/350 is probably the best compromise. It'll be safer on the road, too. There is room for opinion on how tolerable the 350 rear rate is. Less room for opinion on the 500 rear. Certainly some people DD 500 rear but I would not want to. Particularly on a car as light as your hatch.
However I think for DD 350/350 is probably the best compromise. It'll be safer on the road, too. There is room for opinion on how tolerable the 350 rear rate is. Less room for opinion on the 500 rear. Certainly some people DD 500 rear but I would not want to. Particularly on a car as light as your hatch.
01-30-2014, 10:48 AM
#7
Re: progress CS-II Coilover Spring rate
Stiffer rear rates are better for drag racing I think because they result in the chassis responding quicker to weight transfer. I'm not sure if extra compliance in the front helps anything although Progress recommends 350/500 for drag racing (with the CSIIs).
However I think for DD 350/350 is probably the best compromise. It'll be safer on the road, too. There is room for opinion on how tolerable the 350 rear rate is. Less room for opinion on the 500 rear. Certainly some people DD 500 rear but I would not want to. Particularly on a car as light as your hatch.
However I think for DD 350/350 is probably the best compromise. It'll be safer on the road, too. There is room for opinion on how tolerable the 350 rear rate is. Less room for opinion on the 500 rear. Certainly some people DD 500 rear but I would not want to. Particularly on a car as light as your hatch.
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02-02-2014, 05:11 PM
#10
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Re: progress CS-II Coilover Spring rate
350/350 is perfect for a dd. Very comfortable. I recently upgraded the rear to 450 since I autox it a lot. On the hwy, the back end tends to have a little bounce when going overpasses.
02-03-2014, 08:45 AM
#11
Re: progress CS-II Coilover Spring rate
Could I get a couple quick opinions on 350 vs 500 for drag racing. Obviously, 500 will be better, but how much more based on the fact that I have a 2300 lb car (with me) that only makes 280 whp.
02-03-2014, 09:35 AM
#12
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Re: progress CS-II Coilover Spring rate
When I was 350/350, I was having issues getting into the 13's. After upgrading the rear to 450, I ran my best time of 13.6. That's with prob 160 whp.
02-03-2014, 10:51 AM
#13
Re: progress CS-II Coilover Spring rate
So, with 450, how was the ride? 1-10
1. Awful, eBay coilover ride or 4x4s instead of shocks.
5. Stock for being 20 years old.
10. Brand new high end luxury car. Pretty much like riding an elevator.
I am looking to be in the 3~ range. Which is rough, not good for potholes, but with a decent seat will be more than doable for regular driving.
02-03-2014, 04:43 PM
#14
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Re: progress CS-II Coilover Spring rate
The 350/350 were comparable to the ride of my lexus minus all the body roll. The 450 is great but at hwy speed, you get a little bounce. My only complaint. 350/450 I would rate a 7.5-8.
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