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Old 09-25-2010, 01:50 AM   #21
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I've driven half way cross the country with 700/400 even with the wife in the car and I drive them regualarly on the street too. Revalved Koni sports with extended travel shock tops. I also have ISC sway bars. the car is suprisingly comfy on the street and you had better be a hell of a driver and bring some pretty dam good hardware to beat me on the track as well.

Bob
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Old 09-25-2010, 03:17 AM   #22
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my problem is turn in right now. It feel very neutral and I can stomp the gas around corners, but, when i want to turn the wheel fast and induce oversteer for a quick u-turn or something it just plows. this could be partly due to my lack of an alignment, but without my rear bar I really lost the turn-in response.

when I had FM springs and no rear bar I didn't notice this as much, so I think bringing the FRC back down a little should solve it still without being tail happy in other situations.
Same problem I was having. I'm extremely happy to have the rear bar back on. I'm pretty much in the same boat alignment wise as well. Its been well over a year since I had one done and I have the old shitty eccentric bolts that move around.

I actually got to play on a skid pad with and without the rear bar on and the difference is significant.
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Old 09-25-2010, 01:40 PM   #23
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how many of you are running spring rates within the limits of stock koni yellows?
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Old 09-26-2010, 09:49 AM   #24
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how many of you are running spring rates within the limits of stock koni yellows?
Stock yellows, 450/300. Car handles great for such an inexpensive setup. I will eventually move to higher rates with r-comps, but this is a good compromise street/track setup if you want to just arrive & drive on street tires.
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Old 09-26-2010, 11:50 AM   #25
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Stock yellows, 450/300. Car handles great for such an inexpensive setup. I will eventually move to higher rates with r-comps, but this is a good compromise street/track setup if you want to just arrive & drive on street tires.
that's good to hear, cause I just ordered 450/300 springs yesterday. I hope 7" was the right length.
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Old 09-26-2010, 08:48 PM   #26
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I hope 7" was the right length.
Yep, what I run.
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Old 09-26-2010, 11:21 PM   #27
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i ran 550/300 in 7" it works.


stock rear sway definitely helped, still feels the same on high speed, but in low-speed tight corners the weight transfers much better.
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Old 09-27-2010, 12:01 AM   #28
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great, can't wait for my springs to come in.
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Old 10-04-2010, 12:08 PM   #29
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from what I can gather on the fat cat calculator abs feedback I'm getting is that in a sense, FRC is neutral at 50%.


No, that would be super tail happy. It all depends on the driver but you want to stay in the 56-60 range, do more research.
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Old 10-09-2010, 01:55 PM   #30
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got my 450/300 springs and put it all together. I'm pleasantly surprised that the koni's at full soft, ride much smoother than stock. car feels neutral for The most part and a hair loose powering off the corner, although I'll be adding sways soon to dial that in and raise the FRC a bit. immediately increased my twisty road test track by 10mph, without an alignment. happy camper
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Old 10-10-2010, 09:54 PM   #31
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There is no way that the Konis on full soft are properly damping those spring rates. Start experimenting with cranking them up and it should improve handling and ride quality. Find a road with some speed humps and hit them at 15-20 mph. If the car bounces more than 1 rebound event after coming down off the hump, it can use more damping. It's been a while since I did mine but I think I'm around 1.5 turns in the front and 1 in the back with those same spring rates.
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Old 10-10-2010, 10:42 PM   #32
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That was just the first run. I have it at 2 turns front and 1-1/2 rear. I'm getting an alignment tomorrow and I'll do some more tinkering after that.

I'm running stock tophats in front and a 2-1/2" spring which doesn't exactly seat on the hat. Is everyone running spring isolators or is it not a problem?
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Old 10-10-2010, 11:00 PM   #33
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My front tophats are some custom made units that don't have any kind of spring isolators. Not sure if that caused the clunking I heard on the first drive after installation, but it hasn't done it since, and the springs aren't moving around at all.
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Old 10-11-2010, 09:26 AM   #34
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Quote:
Originally Posted by ScottFW View Post
There is no way that the Konis on full soft are properly damping those spring rates. Start experimenting with cranking them up and it should improve handling and ride quality. Find a road with some speed humps and hit them at 15-20 mph. If the car bounces more than 1 rebound event after coming down off the hump, it can use more damping. It's been a while since I did mine but I think I'm around 1.5 turns in the front and 1 in the back with those same spring rates.

I have mine at full soft with 400/250. If i increase rebound the ride quality gets worse. But it could be that they are 2011 years old now and leak at the adjusters and are just plain dead.
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Old 10-11-2010, 06:31 PM   #35
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I'm running stock tophats in front and a 2-1/2" spring which doesn't exactly seat on the hat. Is everyone running spring isolators or is it not a problem?
I have some older FCM shock mounts and I run an upper isolator from Energy Suspensions that's a generic application (# 9.6103G). There may be a tiny gap on the top side of the spring when the car is jacked up in the air and things are at max droop, but it doesn't matter because the suspension never droops enough during any kind of driving for the spring to be free enough to move around. I've checked the little paint marks I put on the perches, springs, etc and nothing has moved one iota since I had it corner balanced last year. It probably doesn't matter if you run without an isolator, aside from a little more NVH maybe.
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Old 10-11-2010, 06:37 PM   #36
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btw, stock 1.6 springs on Bilstein HD's with FM rear mounts and front NB mounts from FCM are awesome for daily Cadillac surfing.
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Old 10-11-2010, 06:54 PM   #37
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cool, my springs haven't moved in the hat so far, but I haven't pushed the new system yet. unless I get some clunky noise, I'll let it be. the FM rear mounts seem fine and way to pretty to hide in the trunk.
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Old 10-11-2010, 06:59 PM   #38
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Out of curiosity, do the FM rear hats impinge on the spare tire space (lame, I know). I'm running ISC rear hats and they are tall enough that the spare tire can't be centered and screwed down normally.
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Old 10-11-2010, 07:09 PM   #39
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No, the FM rear mounts are still tucked under the access hole. Mine were free and since I don't care about the rear pillow ball I would have done the ISC ones since they're cheaper.
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Old 10-11-2010, 07:38 PM   #40
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iscracing tophats only make sense if you're running < 11" ride height.
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